Power turbine nozzles in gas turbine engines

Abstract

A power turbine nozzle for a gas turbine engine includes at least one of a third-stage nozzle, a fourth-stage nozzle, or a fifth-stage nozzle. The power turbine nozzle includes a platform and an airfoil that extends in a spanwise direction from the platform to a tip shroud. The airfoil has an external airfoil surface formed in conformance with multiple cross-section airfoil profiles described by a set of Cartesian coordinates.

Description

1 POWER TURBINE NOZZLES IN GAS TURBINE ENGINES TECHNICAL FIELD

[0001] This disclosure relates to gas turbine engines and, more particularly, to power turbine nozzles of gas turbine engines. BACKGROUND

[0002] A gas turbine engine includes turbine blades and / or nozzles having airfoils subject to harsh temperatures and pressures. To achieve the best possible overall engine efficiency, these airfoils must meet several design criteria that help ensure these airfoils have a solid balance between aerodynamic and structural optimization. The design criteria for these airfoils are constantly being evaluated to improve, for instance, total power capability of the engine. In conducting such evaluations, specific thermal and mechanical requirements such as, for example, heat loading, parts life and manufacturing, use of combustion gases, throat area, vectoring, and / or interaction between different stages of airfoils of the turbine blades and / or nozzles of these engines are taken into consideration. BRIEF DESCRIPTION OF THE DRAWINGS

[0003] A better understanding of the features and advantages of the disclosed technology will be obtained by reference to the following detailed description that sets forth illustrative aspects, in which the principles of the technology are utilized, and the accompanying drawings of which:

[0004] FIG. 1 is a schematic, cross-sectional view of an exemplary gas turbine engine according to various embodiments of the present subject matter;

[0005] FIG. 2 is a cross-section, side view of a low pressure (LP) turbine section of the gas turbine engine of FIG. 1;

[0006] FIGS. 3A-3C are isometric views illustrating a pair of LP nozzles of the gas turbine engine of FIG. 1;

[0007] FIG. 3D is a schematic top view of one of the LP nozzles of FIGS. 3A-3C illustrating directional references;

[0008] FIG. 4A is an isometric view of an exemplary LP nozzle airfoil corresponding to the directional references of FIG. 3D; CA 3302988 Date reçue / Received date 2026-02-25 2

[0009] FIG. 4B is a pressure side view of the exemplary LP nozzle airfoil shown in FIG. 4A;

[0010] FIG. 4C is a suction side view of the exemplary LP nozzle airfoil shown in FIG. 4A; and

[0011] FIG. 5 depicts span positions and local axial chords referenced in Tables below.

[0012] Further exemplary aspects of the disclosure are described in more detail below with reference to the appended figures. Aspects of this disclosure may be combined without departing from the scope of the disclosure. DETAILED DESCRIPTION

[0013] Reference will now be made in detail to present embodiments of the disclosure, one or more examples of which are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the disclosure.

[0014] The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any implementation described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other implementations. Additionally, unless specifically identified otherwise, all embodiments described herein should be considered exemplary.

[0015] The terms “forward” and “aft” refer to relative positions within a turbine engine or vehicle, and refer to the normal operational attitude of the turbine engine or vehicle. For example, with regard to a turbine engine, forward refers to a position on the turbine engine that is closer to the propeller or the fan and aft refers to a position on the turbine engine that is further away from the propeller or the fan. When the turbine engine is configured in a pusher configuration, the propeller or the fan is positioned on an aft side of the turbine engine such that forward refers to a position that is further away from the propeller or the fan and aft refers to a position that is closer to the propeller or the fan.

[0016] The terms “upstream” and “downstream” refer to the relative direction with respect to fluid flow in a fluid pathway. For example, “upstream” refers to the direction from which the fluid flows, and “downstream” refers to the direction to which the fluid flows. CA 3302988 Date reçue / Received date 2026-02-25 3

[0017] All directional references (e.g., radial, axial, proximal, distal, upper, lower, upward, downward, left, right, lateral, front, back, top, bottom, above, below, vertical, horizontal, clockwise, counterclockwise, upstream, downstream, forward, aft, etc.) are only used for identification purposes to aid the reader’s understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of aspects of the disclosure described herein. Connection references (e.g., attached, coupled, connected, joined, etc.) are to be construed broadly and can include intermediate structural elements between a collection of elements and relative movement between elements unless otherwise indicated. Accordingly, connection references do not necessarily infer that two elements are directly connected and in fixed relation to one another. The exemplary drawings are for purposes of illustration only and the dimensions, positions, order and relative sizes reflected in the drawings attached hereto can vary.

[0018] As used herein, the terms “first,” “second,” “third,” etc. may be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components. Unless otherwise specified or understood based on their context of use, such descriptors are not intended to impute any meaning of priority, physical order or arrangement in a list, or ordering in time but are merely used as labels for referring to multiple elements or components separately for ease of understanding the disclosed examples. In some examples, the descriptor “first” may be used to refer to an element in the detailed description, while the same element may be referred to in a claim with a different descriptor such as “second” or “third.” In such instances, it should be understood that such descriptors are used merely for ease of referencing multiple elements or components.

[0019] The singular forms “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise.

[0020] Although this disclosure will be described in terms of specific aspects, it will be readily apparent to those skilled in this art that various modifications, rearrangements, and substitutions may be made without departing from the spirit of this disclosure.

[0021] For purposes of promoting an understanding of the principles of this disclosure, reference will now be made to exemplary aspects illustrated in the drawings, and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of this disclosure is thereby intended. Any alterations and further CA 3302988 Date reçue / Received date 2026-02-25 4 modifications of the inventive features illustrated herein, and any additional applications of the principles of this disclosure, as illustrated herein, which would occur to one skilled in the relevant art and having possession of this disclosure, are to be considered within the scope of this disclosure.

[0022] The aspects disclosed herein are examples of the disclosure and may be embodied in various forms. For instance, although certain aspects herein are described as separate aspects, each of the aspects herein may be combined with one or more of the other aspects herein. Specific structural and functional details disclosed herein are not to be interpreted as limiting, but as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ this disclosure in any appropriately detailed structure.

[0023] The phrases “in an aspect,” “in aspects,” “in various aspects,” “in some aspects,” “in other aspects,” or the like, may each refer to one or more of the same or different aspects in accordance with this disclosure.

[0024] Referring now to the drawings, wherein identical numerals indicate the same elements throughout the figures, FIG. 1 is a schematic, cross-sectional view of a gas turbine engine in accordance with an exemplary embodiment of the present disclosure. More particularly, for the embodiment of FIG. 1, the gas turbine engine is a turboshaft engine, referred to herein as “turboshaft engine 10.” It will be appreciated, however, that in other exemplary embodiments, the turboshaft engine 10 may instead be configured in any other suitable manner. For example, in other exemplary embodiments, the turboshaft engine 10 may instead be configured as a turboprop engine, or any other suitable gas turbine engine.

[0025] As shown in FIG. 1, the turboshaft engine 10 defines a longitudinal centerline 12 that extends in an axial direction X. The turboshaft engine 10 is also defined by directions transverse to axial direction X, namely, a radial direction Z and a circumferential / tangential direction Y (see e.g., FIG. 3A). In general, the turboshaft engine 10 includes a core turbine engine 14 and an output shaft assembly 16.

[0026] The exemplary core turbine engine 14 depicted generally includes a substantially tubular outer casing 18 that partially encloses an annular, radial inlet duct 20. The radial inlet duct 20 includes at least a portion extending generally along the radial direction Z, and is further configured to turn a direction of an air flow therethrough, such that the resulting airflow is CA 3302988 Date reçue / Received date 2026-02-25 5 generally along the axial direction X. Additionally, the outer casing 18 encases, in serial flow relationship, a compressor section 22 including a compressor 22a; a combustion section 24 including a reverse flow combustor 24a; a turbine section 25 including a high pressure (HP) turbine 26 and a low pressure (LP) turbine 28 (also known as the power turbine); and an exhaust section 30. Moreover, the turboshaft engine 10 depicted is a dual-spool engine, including a first, high pressure (HP) shaft or spool 32 coupling the HP turbine 26 to the compressor 22a, and a low pressure (LP) shaft or spool 34 coupled to the LP turbine 28, and drivingly connecting the LP turbine 28 to the output shaft assembly 16.

[0027] Compressor section 22, combustion section 24, turbine section 25, and exhaust section 30 together define a core air flow path 36 through the core turbine engine 14 and which includes a stage of inlet guide vanes 38, which may be configured as variable inlet guide vanes 38 that are rotatable, completely or partially, about a pitch axis 40. The guide vanes 38 to direct an airflow through the radial inlet duct 20 into the compressor 22a of the compressor section 22 in a desired direction. Additionally, in other exemplary embodiments, the stage of inlet guide vanes 38 may instead be located at any other suitable location within the radial inlet duct 20.

[0028] The compressor 22a of the compressor section 22 includes at least three stages of compressor rotor blades. More specifically, for the embodiment depicted, the compressor 22a of the compressor section 22 includes at least four stages of radially oriented compressor rotor blades 42, and an additional stage of centrifugal compressor rotor blades 44. The core turbine engine 14 further includes a transition duct 46 downstream of the compressor 22a. The transition duct 46 has at least a portion extending generally along the radial direction Z to provide a compressed air flow from the compressor 22a to the reverse flow combustor 24a. The stage of centrifugal compressor rotor blades 44 is configured to assist with turning the compressed air within the compressor section 22 radially outward into the transition duct 46. Notably, however, in other exemplary embodiments, the combustion section 24 may not include the reverse flow combustor 24. With such an exemplary embodiment, the compressor 22a may not include the stage of centrifugal compressor rotor blades 44.

[0029] Additionally, between each stage of compressor rotor blades 42, 44, the compressor section 22 includes a stage of compressor stator vanes for converting part of the airflow's dynamic pressure (velocity) into static pressure to increase the air pressure before entering the combustion CA 3302988 Date reçue / Received date 2026-02-25 6 section 24. In certain aspects, one or more stages of the compressor stator vanes can be configured as a stage of variable compressor stator vanes 48, such that each of the variable compressor stator vanes 48 may rotate about a respective pitch axis 50. Additionally, or alternatively, one or more of the compressor stator vanes are configured as fixed compressor stator vanes 52.

[0030] Similarly, as illustrated in FIG. 1, HP turbine 26 includes one or more sequential stages of HP turbine nozzle guide vanes (HP nozzles) 56 and HP turbine rotor blades (HP turbine blades) 58 (e.g., first stage, second stage). HP nozzles 56 are coupled to the outer casing 18 and HP turbine blades 58 are coupled to the HP shaft 32. Likewise, LP turbine 28 includes one or more sequential stages of LP turbine nozzle guide vanes (LP nozzles) 60 and LP turbine rotor blades (LP turbine blades) 62 (e.g., third stage, fourth stage, fifth stage). LP nozzles 60 are coupled to the outer casing 18 and LP turbine blades 62 are coupled to the LP shaft 34. As can be appreciated, any number of stages of turbine blades 58, 62 and / or nozzles 56, 60 can be provided (e.g., one-stage, two-stage, three-stage, four-stage, five-stage, etc.) in the respective HP or LP turbines 26, 28. In addition, each stage can include an array of circumferentially spaced-apart blades or vanes.

[0031] It will be appreciated that during operation of the turboshaft engine 10, a volume of air 54 enters the turboshaft engine 10 through the radial inlet duct 20, and flows across the variable inlet guide vanes 38 and into the compressor 22a of the compressor section 22. A pressure of the air is increased as it is routed through the compressor 22a, and is then provided to the reverse flow combustor 24a of the combustion section 24, where the air is mixed with fuel and burned to provide combustion gases. The combustion gases are routed through the HP turbine 26 where a portion of thermal and / or kinetic energy from the combustion gases is extracted via sequential stages of HP nozzles 56 and HP turbine blades 58 that cause the HP shaft 32 to rotate and thereby support operation of the compressor 22a. The combustion gases are then routed through the LP turbine 28 where a second portion of thermal and kinetic energy is extracted from the combustion gases via sequential stages of LP nozzles 60 that cause the LP shaft 34 to rotate, thereby supporting operation of the output shaft assembly 16. The combustion gases are subsequently routed through the exhaust section 30 of the core turbine engine 14.

[0032] Notably, the drive shaft assembly 16 includes a gearbox 68 and a driveshaft 70. The LP shaft 34 is mechanically coupled to the drive shaft 70 of the drive shaft assembly 16 through the gearbox 68. As will be appreciated, the driveshaft 70 may be coupled to any suitable device. CA 3302988 Date reçue / Received date 2026-02-25 7 For example, in certain exemplary embodiments, the turboshaft engine 10 of FIG. 1 may be utilized to drive a propeller of a helicopter, may be utilized in aeroderivative applications, or may be attached to a propeller for an airplane, in which case the turboshaft engine 10 may instead be referred to as a turboprop engine.

[0033] Referring to FIG. 2, each stage of LP or HP turbine blades and / or nozzles is mounted in a position along a stacking line that extends in the radial direction Z corresponding to a Z axis based on a Cartesian coordinate system. For instance, in the power turbine, namely LP turbine 28, third-stage LP nozzles 603 are mounted in position along a stacking line corresponding to axis ZS3N, fourth-stage LP nozzles 604 are mounted in position along a stacking line corresponding to axis ZS4N, and fifth stage LP nozzles 605 are mounted in position along a stacking line corresponding to axis ZS5N. Similarly, third-stage LP turbine blades 623 are mounted in position along a stacking line corresponding to axis ZS3B, fourth-stage LP turbine blades 604 are mounted in position along a stacking line corresponding to axis ZS4B, and fifth-stage LP turbine blades 625 are mounted in position along a stacking line corresponding to axis ZS5B. The stacking lines define the axial location (X) where the respective nozzles or turbine blades are mounted along the centerline 12 of the engine 10.

[0034] With reference to the FIGS. 3A to 3D and 4A to 4C, each LP nozzle 60 includes an airfoil 100 having an external airfoil surface 102 extending in a chordwise direction CW between a leading edge 104 and a trailing edge 106 and in a spanwise direction Z from a platform 108 to a tip shroud 110. As can be appreciated, the platform 108 can have any suitable shape and / or configuration and may be coupled directly and / or indirectly (e.g., via a root; not shown) to a rotor disk (not shown). In some aspects, platform 108 is integrally formed with the rotor disk (e.g., a radially outward portion of the rotor disk). The airfoil 100 is provided between pressure and suction sides 112, 114 in an airfoil thickness direction T.

[0035] As can be appreciated, the disclosed turbine blades and / or nozzles can be constructed from any suitable material such as a high-strength, heat-resistant material such as a nickel-based or cobalt-based superalloy, or of a high-temperature, stress-resistant ceramic or composite material, for example. In cooled configurations, internal fluid passages and external cooling apertures provide for a combination of impingement and film cooling. In addition, one or more CA 3302988 Date reçue / Received date 2026-02-25 8 thermal barrier coatings (TBC), abrasion-resistant coatings, and / or other protective coatings may be applied to the turbine blades and / or nozzles.

[0036] Referring to FIG. 5, the geometries of external surfaces of the airfoil are described in terms of Cartesian coordinates defined along X, Y, and Z axes, which respectively correspond to the axial (X), circumferential / tangential (Y), and span / radial (Z-span) (Z) directions shown in FIGS. 3A-3D. The span coordinate is provided as a radial distance (ΔZI-ΔZ3) from the rotation axis X of the airfoil. The “0” span is taken at a point P where the airfoil meets the platform 108, as schematically illustrated in FIG. 5. The overall or full span is 100% the distance from the point P to point Q at the tip shroud 110 in the span direction Z. By way of example, the “¼ span” (ΔZ1) is 25% the distance from the point P toward the tip shroud 110 in the span direction Z. As best shown in FIG. 2, the X axis extends axially along the rotation axis of the turbine airfoil 100. The positive X direction is axially towards the aft of the turbine engine 10. The Y axis (FIG. 3A) extends tangentially with the positive Y direction which is in the direction of rotation of the airfoil 100.

[0037] The axial (X) and circumferential (Y) coordinates are normalized by a local axial chord (AXN) for the (3) given span location (AX1-AX3). By way of example, local axial chord (AX1) for axial (X) and circumferential (Y) coordinates associated with the 1 / 4span (ΔZI) corresponds to the width of the airfoil between the leading and trailing edges 104, 106 at the ¼ span location (ΔZI). As another example, local axial chord (AX2) for axial (X) and circumferential (Y) coordinates associated with the 1 / 2 span (ΔZ2) corresponds to the width of the airfoil between the leading and trailing edges 104, 106 at the 1 / 2 span location (ΔZ2). According to yet another example, local axial chord (AX3) for axial (X) and circumferential (Y) coordinates associated with the 3 / 4 span (ΔZ3) corresponds to the width of the airfoil between the leading and trailing edges 104, 106 at the 3 / 4 span location (ΔZ3).

[0038] The contour or profile of the airfoil is set forth in Tables 1-3, which provide the axial (X) and circumferential (Y) coordinates (in inches) scaled by the local axial chord (AXN) for given span locations or positions regarding respective third-, fourth-, or fifth-stage LP nozzles. 3-D airfoil surfaces are formed by joining adjacent points in the respective Tables 1-3 in a smooth manner and joining adjacent sections or sectional profiles along the span. The manufacturing tolerance relative to the specified coordinates is ± 0.004 inches and / or ± 0.05 inches. The CA 3302988 Date reçue / Received date 2026-02-25 9 coordinates define points on a cold, uncoated, stationary airfoil surface at nominal restagger, in a plane at the corresponding span positions. Additional elements such as cooling holes, protective coatings, fillets, and seal structures may also be formed onto the specified airfoil surface, or onto an adjacent platform surface, but these elements are not necessarily described by the normalized coordinates. For example, a variable coating may be applied between 0.001 inches and 0.0035 inches thick. In one aspect, a variable coating is up to 0.02 inches thick. TABLE 1 – Power Turbine Stage 3 Nozzle (603) Z1 (25%) span Z2 (50%) span Z3 (75%) span Z1 Axial Chord = AX1 Z2 Axial Chord = AX2 Z3 Axial Chord = AX3 Point # X Y Point # X Y Point # X Y 1 -1.31855 0.85820 1 -0.67177 0.12443 1 -0.70490 0.22871 2 -1.31098 0.84496 2 -0.59062 0.05431 2 -0.62962 0.15023 3 -1.25661 0.75311 3 -0.50216 -0.00626 3 -0.54778 0.07866 4 -0.99581 0.49198 4 -0.40460 -0.05038 4 -0.45797 0.01747 5 -1.31484 0.93331 5 -0.29653 -0.01417 5 -0.35909 -0.02737 6 -1.33879 0.97343 6 -0.38353 0.04783 6 -0.25230 -0.04376 7 -1.02303 0.41435 7 -0.47386 0.10570 7 -0.24403 0.02834 8 -0.93581 0.30841 8 -0.56072 0.16866 8 -0.33674 0.08491 9 -0.94576 0.31996 9 -0.64371 0.23663 9 -0.42915 0.14225 10 -0.95564 0.33158 10 -0.72276 0.30915 10 -0.51748 0.20568 11 -1.11380 0.63694 11 -0.83765 0.30483 11 -0.60123 0.27504 12 -1.25699 0.84088 12 -0.76787 0.22334 12 -0.73546 0.26390 13 -1.06579 0.57560 13 -0.70471 0.15651 13 -0.66261 0.18316 14 -1.33354 0.88476 14 -0.62621 0.08343 14 -0.58375 0.10830 15 -1.15107 0.68688 15 -0.54108 0.01822 15 -0.49751 0.04214 16 -1.00601 0.50376 16 -0.44758 -0.03410 16 -0.40260 -0.01070 17 -1.03241 0.42637 17 -0.34493 -0.06405 17 -0.29876 -0.04203 18 -1.29860 0.90673 18 -0.34406 0.02424 18 -0.21485 -0.00740 19 -0.90090 0.38881 19 -0.43553 0.08030 19 -0.29616 0.06198 20 -0.95433 0.44549 20 -0.52395 0.14104 20 -0.38999 0.11697 21 -1.01614 0.51559 21 -0.60863 0.20691 21 -0.48017 0.17774 22 -1.07552 0.58777 22 -0.68936 0.27755 22 -0.56591 0.24462 23 -1.36648 0.98185 23 -0.28602 -0.05484 23 -0.76514 0.29984 CA 3302988 Date reçue / Received date 2026-02-25 10 24 -1.10433 0.62457 24 -0.79824 0.25787 24 -0.69449 0.21716 25 -1.33878 0.97345 25 -0.72615 0.17842 25 -0.61836 0.13952 26 -1.08746 0.49944 26 -0.66057 0.11398 26 -0.63569 0.30644 27 -1.30675 0.92000 27 -0.57846 0.04498 27 -0.53547 0.06919 28 -1.17836 0.72481 28 -0.48881 -0.01379 28 -0.44441 0.00987 29 -1.32287 0.94666 29 -0.38992 -0.05479 29 -0.34423 -0.03192 30 -0.92249 0.41128 30 -0.30731 -0.00329 30 -0.23704 -0.04091 31 -1.13256 0.66181 31 -0.39662 0.05580 31 -0.25633 0.03782 32 -1.29569 0.81857 32 -0.48649 0.11438 32 -0.35015 0.09276 33 -0.99452 0.37857 33 -0.57281 0.17807 33 -0.44203 0.15093 34 -0.91173 0.40001 34 -0.65524 0.24673 34 -0.52973 0.21523 35 -1.21391 0.77599 35 -0.73373 0.31985 35 -0.61281 0.28540 36 -1.02621 0.52748 36 -0.82791 0.29300 36 -0.72537 0.25208 37 -1.28797 0.80542 37 -0.75758 0.21199 37 -0.65174 0.17206 38 -1.29039 0.89348 38 -0.69384 0.14571 38 -0.57192 0.09823 39 -1.14185 0.67432 39 -0.61448 0.07355 39 -0.48451 0.03363 40 -1.05600 0.56349 40 -0.52829 0.00977 40 -0.38828 -0.01672 41 -0.94379 0.43402 41 -0.43343 -0.04001 41 -0.28333 -0.04380 42 -1.28213 0.88028 42 -0.32965 -0.06527 42 -0.22241 0.00613 43 -1.30336 0.83175 43 -0.35718 0.03217 43 -0.30975 0.06952 44 -1.23993 0.81481 44 -0.44837 0.08867 44 -0.40312 0.12527 45 -1.19626 0.75032 45 -0.53629 0.15014 45 -0.49270 0.18693 46 -0.98554 0.48027 46 -0.62040 0.21672 46 -0.57778 0.25465 47 -1.27381 0.86711 47 -0.70057 0.28800 47 -0.75534 0.28779 48 -1.09643 0.51177 48 -0.28189 -0.04065 48 -0.68398 0.20572 49 -1.20511 0.76313 49 -0.78820 0.24629 49 -0.60697 0.12896 50 -1.12321 0.64935 50 -0.71548 0.16742 50 -0.64698 0.31710 51 -0.89000 0.37768 51 -0.64924 0.10365 51 -0.52298 0.05993 52 -1.12301 0.54901 52 -0.56616 0.03584 52 -0.43067 0.00263 53 -1.10535 0.52415 53 -0.47527 -0.02096 53 -0.32922 -0.03593 54 -1.23255 0.71420 54 -0.37508 -0.05864 54 -0.22287 -0.03469 55 -1.23132 0.80183 55 -0.31899 0.00663 55 -0.26923 0.04649 56 -0.98490 0.36674 56 -0.40965 0.06387 56 -0.36350 0.10071 57 -1.15766 0.59921 57 -0.49906 0.12316 57 -0.45483 0.15974 58 -1.26543 0.85398 58 -0.58483 0.18758 58 -0.54189 0.22491 59 -1.18734 0.73754 59 -0.66669 0.25691 59 -0.62429 0.29587 60 -1.18309 0.63723 60 -0.74463 0.33063 60 -0.71519 0.24035 CA 3302988 Date reçue / Received date 2026-02-25 11 61 -1.26452 0.76614 61 -0.81809 0.28123 61 -0.64074 0.16108 62 -1.28021 0.79230 62 -0.74719 0.20071 62 -0.55993 0.08835 63 -1.17466 0.62452 63 -0.68286 0.13501 63 -0.47133 0.02540 64 -1.01359 0.40237 64 -0.60262 0.06384 64 -0.37377 -0.02229 65 -1.16933 0.71212 65 -0.51532 0.00160 65 -0.26781 -0.04449 66 -1.06935 0.47491 66 -0.41910 -0.04544 66 -0.23253 0.01789 67 -1.05100 0.45055 67 -0.31434 -0.06494 67 -0.32327 0.07717 68 -1.22264 0.78889 68 -0.37038 0.03995 68 -0.41617 0.13370 69 -1.36294 0.93820 69 -0.46115 0.09713 69 -0.50513 0.19624 70 -1.21627 0.68841 70 -0.54854 0.15935 70 -0.58955 0.26479 71 -1.34834 0.91142 71 -0.63210 0.22663 71 -0.74545 0.27580 72 -1.14044 0.57403 72 -0.71170 0.29854 72 -0.67335 0.19439 73 -1.06020 0.46271 73 -0.28741 -0.02647 73 -0.59544 0.11855 74 -1.24849 0.82783 74 -0.77808 0.23478 74 -0.65819 0.32787 75 -1.24062 0.72714 75 -0.63779 0.09346 75 -0.51033 0.05091 76 -1.11420 0.53656 76 -0.55370 0.02691 76 -0.41673 -0.00424 77 -1.35089 0.98402 77 -0.46152 -0.02774 77 -0.31407 -0.03935 78 -0.97521 0.35497 78 -0.36008 -0.06178 78 -0.21364 -0.02265 79 -0.96480 0.45702 79 -0.33129 0.01577 79 -0.28256 0.05447 80 -1.13175 0.56150 80 -0.42262 0.07204 80 -0.37678 0.10878 81 -1.22444 0.70129 81 -0.51154 0.13205 81 -0.46754 0.16868 82 -1.37354 0.96745 82 -0.59677 0.19720 82 -0.55395 0.23471 83 -0.97521 0.46861 83 -0.67806 0.26719 83 -0.77486 0.31197 84 -1.14908 0.58660 84 -0.29928 -0.06221 84 -0.70211 0.37184 85 -1.37021 0.95162 85 -0.80820 0.26951 85 -0.77564 0.45197 86 -1.07843 0.48715 86 -0.73672 0.18952 86 -0.84524 0.53554 87 -1.24864 0.74011 87 -0.79799 0.38563 87 -0.91122 0.62200 88 -1.00409 0.39045 88 -1.08545 0.65485 88 -0.97382 0.71094 89 -1.27239 0.77921 89 -1.02764 0.56447 89 -1.04063 0.71312 90 -1.33085 0.96004 90 -0.96719 0.47584 90 -0.98578 0.61920 91 -1.19978 0.66276 91 -0.90394 0.38918 91 -0.92818 0.52694 92 -1.32607 0.87146 92 -0.81881 0.40813 92 -0.86754 0.43665 93 -1.37017 0.95163 93 -0.88944 0.48888 93 -0.80348 0.34876 94 -1.34096 0.89808 94 -0.95674 0.57243 94 -0.66930 0.33873 95 -1.16023 0.69948 95 -1.02090 0.65842 95 -0.74463 0.41717 96 -1.09479 0.61225 96 -0.76620 0.35241 96 -0.81587 0.49934 97 -1.04613 0.55143 97 -1.10946 0.69407 97 -0.88337 0.58462 CA 3302988 Date reçue / Received date 2026-02-25 12 98 -1.04174 0.43843 98 -1.05273 0.60301 98 -0.94739 0.67255 99 -1.03620 0.53943 99 -0.99343 0.51360 99 -1.00960 0.65926 100 -1.19146 0.64998 100 -0.93140 0.42606 100 -0.95322 0.56626 101 -1.35566 0.92480 101 -0.86646 0.34066 101 -0.89392 0.47508 102 -1.20805 0.67557 102 -0.85959 0.45391 102 -0.83138 0.38610 103 -1.08519 0.59998 103 -0.92830 0.53630 103 -0.71286 0.38306 104 -0.93317 0.42262 104 -0.99378 0.62129 104 -0.78582 0.46372 105 -0.96546 0.34324 105 -1.05621 0.70853 105 -0.85489 0.54772 106 -1.16619 0.61185 106 -1.13302 0.73355 106 -0.92036 0.63456 107 -0.87903 0.36662 107 -1.07735 0.64184 107 -0.98250 0.72383 108 -0.72041 0.09297 108 -1.01917 0.55170 108 -1.03295 0.69961 109 -0.92579 0.29691 109 -0.95833 0.46333 109 -0.97772 0.60591 110 -0.69672 0.07375 110 -0.89467 0.37698 110 -0.91971 0.51391 111 -0.86798 0.35564 111 -0.82911 0.41948 111 -0.85861 0.42394 112 -0.74361 0.11275 112 -0.89926 0.50065 112 -0.79403 0.33643 113 -0.61870 0.14432 113 -0.96610 0.58457 113 -0.68033 0.34968 114 -0.67253 0.05519 114 -1.02982 0.67088 114 -0.75505 0.42870 115 -0.66872 0.18146 115 -0.77687 0.36341 115 -0.82574 0.51135 116 -0.79979 0.16430 116 -1.10151 0.68096 116 -0.89273 0.59703 117 -0.88502 0.25155 117 -1.04442 0.59013 117 -0.95626 0.68530 118 -0.70548 0.21033 118 -0.98474 0.50097 118 -1.00172 0.64588 119 -0.75505 0.12284 119 -0.92231 0.41372 119 -0.94493 0.55311 120 -0.74155 0.24004 120 -0.85693 0.32866 120 -0.88520 0.46222 121 -0.75342 0.25012 121 -0.86961 0.46551 121 -0.82216 0.37359 122 -0.87465 0.24037 122 -0.93784 0.54829 122 -0.72354 0.39435 123 -0.60601 0.13527 123 -1.00288 0.63362 123 -0.79591 0.47553 124 -0.91570 0.28548 124 -1.06489 0.72116 124 -0.86445 0.55997 125 -0.64385 0.16270 125 -1.12522 0.72036 125 -0.92944 0.64718 126 -0.84567 0.33390 126 -1.06920 0.62886 126 -1.02522 0.68613 127 -0.81074 0.17491 127 -1.01064 0.53896 127 -0.96961 0.59266 128 -0.84307 0.20727 128 -0.94941 0.45087 128 -0.91118 0.50092 129 -0.66022 0.04618 129 -0.88533 0.36482 129 -0.84961 0.41127 130 -0.78858 0.28091 130 -0.83934 0.43089 130 -0.78448 0.32417 131 -0.83237 0.19640 131 -0.90900 0.51248 131 -0.69126 0.36072 132 -0.83440 0.32314 132 -0.97539 0.59676 132 -0.76538 0.44030 133 -0.69330 0.20061 133 -1.03868 0.68339 133 -0.83553 0.52341 134 -0.63131 0.15346 134 -0.78747 0.37449 134 -0.90201 0.60949 CA 3302988 Date reçue / Received date 2026-02-25 13 135 -0.76522 0.26030 135 -1.09351 0.66789 135 -0.96507 0.69810 136 -0.70863 0.08328 136 -1.03606 0.57728 136 -0.99377 0.63252 137 -0.90554 0.27410 137 -0.97599 0.48839 137 -0.93659 0.54000 138 -0.76638 0.13305 138 -0.91316 0.40143 138 -0.87640 0.44941 139 -0.77694 0.27056 139 -0.84732 0.31672 139 -0.81286 0.36115 140 -0.65633 0.17203 140 -0.80844 0.39685 140 -0.73412 0.40572 141 -0.71758 0.22014 141 -0.87956 0.47717 141 -0.80593 0.48740 142 -0.78874 0.15378 142 -0.94733 0.56034 142 -0.87395 0.57227 143 -0.82160 0.18561 143 -1.01192 0.64599 143 -0.93845 0.65984 144 -0.68105 0.19099 144 -1.07352 0.73384 144 -1.01744 0.67268 145 -0.72960 0.23004 145 -0.75546 0.34148 145 -0.96145 0.57944 146 -0.77761 0.14336 146 -1.11736 0.70720 146 -0.90258 0.48798 147 -0.85686 0.34473 147 -1.06099 0.61592 147 -0.84053 0.39866 148 -0.89532 0.26279 148 -1.00206 0.52626 148 -1.03325 0.80203 149 -0.64778 0.03737 149 -0.94044 0.43844 149 -1.08963 0.89504 150 -0.86420 0.22926 150 -0.87593 0.35272 150 -1.14294 0.98984 151 -0.68469 0.06439 151 -0.84950 0.44237 151 -1.21051 1.04497 152 -0.80015 0.29135 152 -0.91868 0.52437 152 -1.15031 1.00352 153 -0.59326 0.12633 153 -0.98462 0.60900 153 -1.21246 1.06010 154 -0.73207 0.10279 154 -1.04748 0.69594 154 -1.14299 0.90504 155 -0.81164 0.30186 155 -1.24420 0.93476 155 -1.09299 0.80845 156 -0.85367 0.21823 156 -1.19368 0.84011 156 -1.00816 0.76275 157 -0.82306 0.31246 157 -1.14078 0.74677 157 -1.06584 0.85495 158 -0.59654 0.00430 158 -1.08208 0.74655 158 -1.12047 0.94900 159 -0.37630 -0.02866 159 -1.14041 0.83659 159 -1.18404 0.98874 160 -0.52850 0.08306 160 -1.19592 0.92840 160 -1.17914 1.05858 161 -0.58044 0.11748 161 -1.24864 1.02184 161 -1.16372 0.94679 162 -0.39910 -0.00049 162 -1.26513 0.97570 162 -1.11470 0.84970 163 -0.50214 0.06644 163 -1.21562 0.88052 163 -1.06337 0.75381 164 -0.44871 0.03448 164 -1.16374 0.78661 164 -1.04149 0.81520 165 -0.50023 -0.04129 165 -1.11576 0.79778 165 -1.09744 0.90847 166 -0.54265 -0.02420 166 -1.17248 0.88885 166 -1.20396 1.03089 167 -0.45037 -0.05473 167 -1.22639 0.98160 167 -1.15761 1.01723 168 -0.44869 0.03442 168 -1.27885 1.00311 168 -1.21051 1.04497 169 -0.40202 -0.05825 169 -1.23713 0.92116 169 -1.13599 0.89117 170 -0.39007 -0.05607 170 -1.18627 0.82669 170 -1.08566 0.79475 171 -0.52871 -0.03038 171 -1.09059 0.75930 171 -1.01658 0.77580 CA 3302988 Date reçue / Received date 2026-02-25 14 172 -0.58333 -0.00331 172 -1.14851 0.84960 172 -1.07384 0.86828 173 -0.46226 -0.05220 173 -1.20362 0.94165 173 -1.12803 0.96258 174 -0.56995 -0.01062 174 -1.25958 1.03216 174 -1.17731 0.97474 175 -0.48571 -0.04594 175 -1.25820 0.96203 175 -1.18872 1.07052 176 -0.46214 0.04227 176 -1.20836 0.86702 176 -1.15685 0.93285 177 -0.63520 0.02875 177 -1.15614 0.77330 177 -1.10751 0.83592 178 -0.37371 -0.04042 178 -1.12403 0.81068 178 -1.05584 0.74022 179 -0.47554 0.05023 179 -1.18035 0.90200 179 -0.99111 0.73676 180 -0.54158 0.09152 180 -1.23386 0.99498 180 -1.04967 0.82841 181 -0.62247 0.02036 181 -1.27885 1.00311 181 -1.10518 0.92195 182 -0.37918 -0.05084 182 -1.23001 0.90759 182 -1.19736 1.01682 183 -0.48575 -0.04591 183 -1.17881 0.81330 183 -1.16485 1.03098 184 -0.55460 0.10007 184 -1.09904 0.77209 184 -1.12894 0.87732 185 -0.48887 0.05829 185 -1.15656 0.86265 185 -1.07827 0.78108 186 -0.42802 0.02170 186 -1.21127 0.95494 186 -1.02495 0.78890 187 -0.56755 0.10873 187 -1.27425 1.03105 187 -1.08177 0.88164 188 -0.41416 -0.05877 188 -1.25122 0.94838 188 -1.13552 0.97619 189 -0.41803 0.01476 189 -1.20104 0.85355 189 -1.17053 0.96075 190 -0.55639 -0.01760 190 -1.14848 0.76002 190 -1.20360 1.07219 191 -0.43838 -0.05673 191 -1.13225 0.82362 191 -1.14994 0.91893 192 -0.51535 0.07470 192 -1.18816 0.91518 192 -1.10027 0.82217 193 -0.51457 -0.03609 193 -1.24128 1.00840 193 -1.04826 0.72665 194 -0.40837 0.00739 194 -1.27201 0.98940 194 -0.99967 0.74973 195 -0.42630 -0.05814 195 -1.22284 0.89404 195 -1.05779 0.84166 196 -0.43826 0.02825 196 -1.17130 0.79994 196 -1.11286 0.93545 197 -0.60959 0.01220 197 -1.10743 0.78491 197 -1.19072 1.00277 198 -0.47405 -0.04923 198 -1.16455 0.87573 198 -1.17203 1.04476 199 -0.39039 -0.00896 199 -1.21885 0.96825 199 -1.12184 0.86350 200 -0.38258 -0.01828 200 -1.28147 1.01799 200 -1.07084 0.76743 TABLE 2 – Power Turbine Stage 4 Nozzle (604) Z1 (25%) span Z2 (50%) span Z3 (75%) span Z1 Axial Chord = AX1 Z2 Axial Chord = AX2 Z3 Axial Chord = AX3 Point # X Y Point # X Y Point # X Y 1 -1.10863 0.59374 1 -0.94433 0.41550 1 -1.12867 0.72818 CA 3302988 Date reçue / Received date 2026-02-25 15 2 -1.13934 0.66031 2 -1.14639 0.72222 2 -1.06632 0.67470 3 -1.14539 0.67367 3 -0.98904 0.49091 3 -1.00826 0.55644 4 -1.02134 0.52751 4 -0.88823 0.32997 4 -1.03468 0.60870 5 -1.16650 0.74040 5 -1.12133 0.75144 5 -1.02527 0.48585 6 -1.12100 0.62033 6 -1.01738 0.54204 6 -1.12329 0.71457 7 -1.08351 0.54074 7 -0.93141 0.27464 7 -1.00150 0.54346 8 -1.07714 0.52753 8 -0.96003 0.32561 8 -1.10137 0.66026 9 -1.15328 0.74669 9 -1.03115 0.56782 9 -1.01497 0.56946 10 -1.05024 0.57855 10 -1.11230 0.64143 10 -1.12434 0.76368 11 -1.07136 0.61713 11 -0.95955 0.44045 11 -1.01906 0.47259 12 -1.12559 0.72115 12 -1.07073 0.54796 12 -1.07880 0.60623 13 -1.09204 0.65596 13 -0.95198 0.42795 13 -1.13401 0.74181 14 -1.11483 0.60703 14 -0.91284 0.36625 14 -1.11787 0.70097 15 -1.11897 0.70806 15 -1.05227 0.50820 15 -1.09662 0.74134 16 -1.13217 0.73425 16 -0.86999 0.17519 16 -1.04956 0.53913 17 -1.16934 0.72721 17 -0.93868 0.28732 17 -0.96657 0.47913 18 -1.07075 0.51433 18 -1.00752 0.41621 18 -0.98775 0.51761 19 -1.12714 0.63364 19 -1.09019 0.68534 19 -1.03752 0.51244 20 -1.10240 0.58047 20 -1.00335 0.51640 20 -0.99466 0.53051 21 -1.11230 0.69500 21 -1.12381 0.66830 21 -1.05550 0.55251 22 -1.00655 0.50218 22 -0.87130 0.30614 22 -1.09017 0.63321 23 -1.08983 0.55397 23 -1.10648 0.62803 23 -1.08451 0.61971 24 -1.09613 0.56721 24 -0.96704 0.45300 24 -1.11052 0.76649 25 -1.06437 0.60424 25 -0.85391 0.28265 25 -0.98077 0.50474 26 -1.09884 0.66895 26 -1.06462 0.53469 26 -1.04356 0.52577 27 -1.04309 0.56574 27 -0.74864 0.16134 27 -1.09066 0.72796 28 -1.13955 0.74679 28 -1.08385 0.67218 28 -1.07248 0.68798 29 -1.02864 0.54022 29 -0.98076 0.36424 29 -0.97371 0.49191 30 -1.07830 0.63005 30 -0.87982 0.31801 30 -1.11241 0.68738 31 -1.16339 0.71381 31 -0.93659 0.40310 31 -1.02817 0.59559 32 -1.05733 0.59138 32 -0.75896 0.17169 32 -1.07859 0.70129 33 -1.15742 0.70041 33 -0.90910 0.23690 33 -1.07305 0.59277 34 -1.13325 0.64697 34 -0.81763 0.23682 34 -1.10691 0.67381 35 -1.01397 0.51483 35 -0.92085 0.37847 35 -1.10253 0.75473 36 -1.08520 0.64299 36 -0.87803 0.18739 36 -1.05384 0.64822 37 -1.03589 0.55297 37 -1.01407 0.42927 37 -1.02160 0.58251 38 -1.15142 0.68703 38 -1.11807 0.65486 38 -1.06011 0.66145 CA 3302988 Date reçue / Received date 2026-02-25 16 39 -1.06432 0.50116 39 -1.10063 0.61464 39 -1.09579 0.64673 40 -1.10559 0.68196 40 -1.04603 0.49498 40 -1.06140 0.56591 41 -0.84270 0.25923 41 -1.09648 0.69853 41 -1.04112 0.62185 42 -0.91222 0.35369 42 -0.90149 0.22443 42 -1.06725 0.57933 43 -1.03824 0.44862 43 -0.89653 0.34199 43 -1.04751 0.63502 44 -0.94869 0.28036 44 -0.92406 0.26201 44 -1.13622 0.75577 45 -1.01154 0.39639 45 -0.84503 0.27104 45 -1.03142 0.49913 46 -0.91166 0.21709 46 -1.08880 0.58791 46 -0.95935 0.46640 47 -0.91922 0.22965 47 -0.97445 0.46559 47 -1.08465 0.71462 48 -0.86949 0.29412 48 -1.04467 0.59373 48 -0.82097 0.25986 49 -1.01828 0.40942 49 -0.89377 0.21202 49 -0.80225 0.23735 50 -0.86066 0.28241 50 -0.91663 0.24943 50 -0.92545 0.29032 51 -0.92870 0.37795 51 -1.09473 0.60126 51 -0.94465 0.44108 52 -0.88686 0.31775 52 -0.97392 0.35133 52 -0.81169 0.24854 53 -0.76629 0.17027 53 -1.03794 0.58076 53 -0.89827 0.36649 54 -0.96303 0.30594 54 -0.95299 0.31280 54 -0.75257 0.18362 55 -0.93681 0.39016 55 -0.82690 0.24812 55 -0.92958 0.41597 56 -0.93410 0.25493 56 -1.10273 0.71175 56 -0.93969 0.31590 57 -0.92669 0.24227 57 -0.78897 0.20365 57 -0.92191 0.40351 58 -0.90386 0.34165 58 -1.06451 0.63283 58 -0.78290 0.21538 59 -0.99153 0.47700 59 -1.05847 0.52143 59 -0.96725 0.36756 60 -0.96069 0.42711 60 -1.11507 0.73824 60 -0.91085 0.26493 61 -1.05135 0.47485 61 -1.07746 0.65903 61 -0.84792 0.29454 62 -0.82431 0.23639 62 -0.88595 0.19967 62 -0.85659 0.17803 63 -0.97715 0.33165 63 -0.99426 0.39016 63 -0.88050 0.21486 64 -1.05785 0.48799 64 -1.03339 0.46863 64 -0.99367 0.41982 65 -0.94485 0.40243 65 -0.98178 0.47823 65 -0.98059 0.39363 66 -0.88057 0.16736 66 -1.12951 0.68176 66 -0.91820 0.27760 67 -0.99793 0.37042 67 -1.14763 0.74835 67 -0.88825 0.22728 68 -0.97012 0.31878 68 -1.05134 0.60674 68 -0.91413 0.39110 69 -0.79586 0.20284 69 -1.07680 0.56126 69 -0.85663 0.30630 70 -0.88848 0.17970 70 -0.99623 0.50364 70 -0.90626 0.37876 71 -0.87822 0.30590 71 -0.98754 0.37718 71 -0.89588 0.23977 72 -0.96851 0.43951 72 -1.02700 0.45549 72 -0.95362 0.34165 73 -0.89540 0.32966 73 -1.14080 0.70872 73 -1.01280 0.45935 74 -1.03163 0.43553 74 -1.10892 0.72498 74 -0.98716 0.40671 75 -0.95281 0.41474 75 -0.90474 0.35409 75 -0.88197 0.34217 CA 3302988 Date reçue / Received date 2026-02-25 17 76 -1.00476 0.38339 76 -0.96701 0.33845 76 -0.93716 0.42850 77 -0.99907 0.48957 77 -1.01040 0.52920 77 -0.93261 0.30308 78 -1.04481 0.46173 78 -0.76912 0.18219 78 -0.97396 0.38058 79 -0.92050 0.36579 79 -1.08282 0.57457 79 -1.00010 0.43297 80 -0.97625 0.45197 80 -1.02056 0.44237 80 -0.76286 0.19403 81 -0.99106 0.35747 81 -1.13434 0.75443 81 -0.74211 0.17338 82 -0.83355 0.24777 82 -0.83603 0.25953 82 -1.00648 0.44615 83 -1.02498 0.42246 83 -0.79867 0.21458 83 -0.95204 0.45371 84 -0.95589 0.29314 84 -1.00092 0.40317 84 -0.73145 0.16335 85 -0.78614 0.19186 85 -0.94587 0.30004 85 -0.94670 0.32875 86 -0.80546 0.21392 86 -1.02430 0.55491 86 -0.86520 0.31817 87 -0.90402 0.20457 87 -1.05796 0.61977 87 -0.87365 0.33013 88 -0.98392 0.46446 88 -1.13517 0.69523 88 -0.87265 0.20251 89 -0.81494 0.22511 89 -0.86183 0.16306 89 -0.79266 0.22629 90 -0.85173 0.27078 90 -0.77912 0.19285 90 -0.86468 0.19023 91 -0.89630 0.19211 91 -0.86266 0.29435 91 -0.96048 0.35459 92 -0.98413 0.34454 92 -1.07101 0.64592 92 -0.84837 0.16591 93 -0.94143 0.26763 93 -1.03973 0.48180 93 -0.77297 0.20462 94 -0.77628 0.18100 94 -0.92876 0.39076 94 -0.90342 0.25232 95 -0.77642 0.02570 95 -0.80822 0.22564 95 -0.83908 0.28287 96 -0.66973 0.08048 96 -1.15194 0.73574 96 -0.83010 0.27131 97 -0.83945 0.10667 97 -0.85356 0.15101 97 -0.89018 0.35429 98 -0.81332 0.07128 98 -0.32235 -0.13894 98 -0.52126 0.03340 99 -0.80433 0.05969 99 -0.36160 -0.02160 99 -0.84003 0.15388 100 -0.79519 0.04823 100 -0.78246 0.05827 100 -0.67528 0.11646 101 -0.62249 0.04574 101 -0.49637 -0.13437 101 -0.40777 0.00517 102 -0.76678 0.01465 102 -0.27397 -0.02084 102 -0.49342 0.02437 103 -0.73548 0.13888 103 -0.70568 0.12172 103 -0.79625 0.09523 104 -0.74590 0.14920 104 -0.59204 -0.09880 104 -0.69834 0.13451 105 -0.61023 0.03770 105 -0.51868 0.00972 105 -0.75835 0.05060 106 -0.68110 0.08974 106 -0.47687 -0.00344 106 -0.74843 0.03984 107 -0.63457 0.05405 107 -0.59838 0.04604 107 -0.46517 0.01668 108 -0.54615 0.00218 108 -0.19975 -0.09329 108 -0.53501 0.03844 109 -0.57232 0.01540 109 -0.81023 0.09219 109 -0.37876 0.00119 110 -0.58514 0.02252 110 -0.36579 -0.14468 110 -0.61424 0.07614 111 -0.70333 0.10886 111 -0.27977 -0.12857 111 -0.66346 0.10783 112 -0.72492 0.12871 112 -0.15276 -0.04075 112 -0.56207 0.04960 CA 3302988 Date reçue / Received date 2026-02-25 18 113 -0.71420 0.11870 113 -0.21571 -0.01621 113 -0.58851 0.06219 114 -0.59778 0.02995 114 -0.33676 -0.14137 114 -0.57537 0.05572 115 -0.69230 0.09920 115 -0.40525 -0.01763 115 -0.80531 0.10673 116 -0.87256 0.15507 116 -0.18658 -0.01799 116 -0.71748 0.00869 117 -0.84790 0.11865 117 -0.46774 -0.14020 117 -0.45092 0.01334 118 -0.75617 0.15967 118 -0.76309 0.03638 118 -0.47934 0.02036 119 -0.75696 0.00376 119 -0.40960 -0.14580 119 -0.43659 0.01031 120 -0.82217 0.08297 120 -0.55927 0.02625 120 -0.62683 0.08361 121 -0.83087 0.09477 121 -0.28856 -0.02167 121 -0.72060 0.15351 122 -0.65819 0.07143 122 -0.74299 0.01516 122 -0.63923 0.09139 123 -0.85623 0.13072 123 -0.24484 -0.01845 123 -0.54862 0.04384 124 -0.64647 0.06262 124 -0.61105 0.05332 124 -0.76809 0.06153 125 -0.55933 0.00861 125 -0.25940 -0.01977 125 -0.78703 0.08386 126 -0.78589 0.03689 126 -0.15665 -0.05464 126 -0.50740 0.02871 127 -0.86445 0.14286 127 -0.64243 -0.06924 127 -0.39329 0.00304 128 -0.23085 -0.12011 128 -0.68314 0.10312 128 -0.36421 -0.00039 129 -0.55691 -0.14120 129 -0.48211 -0.13754 129 -0.77765 0.07262 130 -0.34780 -0.04387 130 -0.30803 -0.13599 130 -0.70957 0.14390 131 -0.59703 -0.12321 131 -0.83664 0.12718 131 -0.42221 0.00759 132 -0.51929 -0.00959 132 -0.34700 -0.02222 132 -0.60146 0.06900 133 -0.49180 -0.01977 133 -0.63016 -0.07718 133 -0.83156 0.14194 134 -0.18409 -0.08506 134 -0.62354 0.06091 134 -0.68691 0.12536 135 -0.51508 -0.15474 135 -0.80114 0.08075 135 -0.73831 0.02926 136 -0.17541 -0.07328 136 -0.71668 0.13134 136 -0.72800 0.01887 137 -0.17064 -0.05954 137 -0.41972 -0.01557 137 -0.65144 0.09946 138 -0.45743 -0.16522 138 -0.42420 -0.14516 138 -0.82295 0.13009 139 -0.20184 -0.03476 139 -0.23864 -0.11347 139 -0.81420 0.11836 140 -0.52919 -0.15074 140 -0.21242 -0.10057 140 -0.19340 -0.09285 141 -0.43519 -0.03498 141 -0.23030 -0.01700 141 -0.20335 -0.00568 142 -0.63513 -0.10125 142 -0.81918 0.10374 142 -0.23349 -0.11068 143 -0.21820 -0.11262 143 -0.82798 0.11541 143 -0.24725 -0.00538 144 -0.54314 -0.14623 144 -0.29384 -0.13254 144 -0.32042 -0.00370 145 -0.69389 -0.05750 145 -0.52453 -0.12655 145 -0.33291 -0.13444 146 -0.35512 -0.16244 146 -0.17241 -0.02152 146 -0.58785 -0.08600 147 -0.17533 -0.04618 147 -0.20110 -0.01644 147 -0.30396 -0.13012 148 -0.31848 -0.04321 148 -0.84516 0.13905 148 -0.27653 -0.00518 149 -0.24569 -0.03477 149 -0.43412 -0.01312 149 -0.39136 -0.13730 CA 3302988 Date reçue / Received date 2026-02-25 19 150 -0.64736 -0.09316 150 -0.37618 -0.02063 150 -0.28961 -0.12723 151 -0.42077 -0.03764 151 -0.71138 -0.01521 151 -0.53445 -0.10992 152 -0.27470 -0.03908 152 -0.73266 0.00483 152 -0.67334 -0.02976 153 -0.41351 -0.16730 153 -0.66630 -0.05238 153 -0.46407 -0.12976 154 -0.46373 -0.02827 154 -0.45329 -0.14236 154 -0.31840 -0.13252 155 -0.25700 -0.13337 155 -0.53838 -0.12190 155 -0.14632 -0.05863 156 -0.65935 -0.08472 156 -0.50486 0.00495 156 -0.27536 -0.12386 157 -0.30385 -0.04224 157 -0.26587 -0.12408 157 -0.20653 -0.09928 158 -0.47783 -0.02424 158 -0.64795 0.07698 158 -0.34963 -0.00173 159 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-0.01932 188 -0.47840 -0.12674 189 -0.23082 -0.12009 189 -0.46271 -0.00705 189 -0.26189 -0.00535 190 -0.21643 -0.03336 190 -0.69450 0.11231 190 -0.70676 -0.00128 191 -0.27047 -0.13915 191 -0.33239 -0.02253 191 -0.14749 -0.02080 192 -0.20605 -0.10443 192 -0.57248 0.03250 192 -0.13872 -0.04620 193 -0.42818 -0.16715 193 -0.54589 0.02037 193 -0.23261 -0.00528 194 -0.37710 -0.04276 194 -0.35125 -0.14328 194 -0.44965 -0.13227 195 -0.48646 -0.16108 195 -0.55207 -0.11679 195 -0.43515 -0.13428 196 -0.19457 -0.09530 196 -0.67160 0.09415 196 -0.33503 -0.00283 197 -0.36246 -0.04354 197 -0.30316 -0.02224 197 -0.57479 -0.09261 198 -0.28417 -0.14437 198 -0.44846 -0.01028 198 -0.18059 -0.08577 199 -0.23109 -0.03348 199 -0.67790 -0.04349 199 -0.61335 -0.07162 200 -0.53280 -0.00389 200 -0.70044 -0.02489 200 -0.40599 -0.13679 TABLE 3 – Power Turbine Stage 5 Nozzle (605) Z1 (25%) span Z2 (50%) span Z3 (75%) span Z1 Axial Chord = AX1 Z2 Axial Chord = AX2 Z3 Axial Chord = AX3 Point # X Y Point # X Y Point # X Y 1 -0.14811 -0.01645 1 -0.07713 -0.06993 1 -0.12042 -0.19941 2 -0.19573 -0.11684 2 -0.09221 -0.06678 2 -0.06285 -0.18756 3 -0.19126 -0.01786 3 -0.11036 -0.14829 3 -0.03583 -0.17597 4 -0.10295 -0.07878 4 -0.06254 -0.07485 4 -0.03821 -0.11215 5 -0.13372 -0.01669 5 -0.09585 -0.14312 5 -0.09131 -0.19508 6 -0.25251 -0.12598 6 -0.20123 -0.16355 6 -0.08012 -0.09867 7 -0.14110 -0.09885 7 -0.13825 -0.06296 7 -0.01493 -0.12975 8 -0.07991 -0.03343 8 -0.12288 -0.06400 8 -0.02361 -0.16780 9 -0.09151 -0.07006 9 -0.15361 -0.06162 9 -0.01365 -0.15704 10 -0.18181 -0.11318 10 -0.04501 -0.10979 10 -0.14982 -0.20079 11 -0.11939 -0.01797 11 -0.15525 -0.15916 11 -0.02556 -0.11964 12 -0.15447 -0.10419 12 -0.16893 -0.05997 12 -0.05176 -0.10640 13 -0.09166 -0.02529 13 -0.17051 -0.16131 13 -0.00942 -0.14318 14 -0.20566 -0.01781 14 -0.04932 -0.08267 14 -0.10581 -0.19763 15 -0.16249 -0.01700 15 -0.04100 -0.09526 15 -0.06581 -0.10201 16 -0.12797 -0.09296 16 -0.06807 -0.12986 16 -0.16454 -0.20047 CA 3302988 Date reçue / Received date 2026-02-25 21 17 -0.22004 -0.01744 17 -0.18584 -0.16276 17 -0.13510 -0.20045 18 -0.17687 -0.01758 18 -0.12513 -0.15268 18 -0.04906 -0.18243 19 -0.22394 -0.12250 19 -0.14011 -0.15629 19 -0.08014 -0.09866 20 -0.16805 -0.10897 20 -0.10750 -0.06495 20 -0.11704 -0.09046 21 -0.11519 -0.08634 21 -0.05545 -0.12104 21 -0.09862 -0.09472 22 -0.08169 -0.05957 22 -0.08167 -0.13709 22 -0.07698 -0.19170 23 -0.14112 -0.09883 23 -0.95294 0.71736 23 -0.38483 -0.12481 24 -0.20978 -0.11994 24 -0.87789 0.56540 24 -0.49975 -0.03318 25 -0.23820 -0.12451 25 -0.93323 0.67555 25 -0.43894 0.06265 26 -0.10525 -0.02059 26 -1.00026 0.74485 26 -0.43303 -0.09100 27 -0.07573 -0.04662 27 -1.01526 0.85828 27 -0.57552 0.19305 28 -0.48780 -0.07296 28 -1.00919 0.84412 28 -0.70439 0.23538 29 -0.41605 0.02453 29 -0.97845 0.77347 29 -0.40931 -0.10844 30 -0.50578 0.07011 30 -0.97698 0.68778 30 -0.52382 0.13785 31 -0.56522 0.11062 31 -0.90609 0.62021 31 -0.64648 0.28155 32 -0.45540 0.04228 32 -0.88504 0.57905 32 -0.74085 0.29933 33 -0.44243 0.03605 33 -0.99704 0.81580 33 -0.25147 -0.18596 34 -0.37550 0.00972 34 -0.98469 0.78756 34 -0.47824 -0.05329 35 -0.35287 -0.12121 35 -0.92653 0.66167 35 -0.42391 0.05117 36 -0.33866 -0.12347 36 -1.02838 0.81658 36 -0.68986 0.34352 37 -0.57143 -0.01700 37 -0.96580 0.74537 37 -0.53071 -0.00169 38 -0.29565 -0.12713 38 -0.91297 0.63400 38 -0.26062 -0.04336 39 -0.47506 -0.07966 39 -0.89212 0.59273 39 -0.35961 -0.14000 40 -0.57664 0.11939 40 -0.94064 0.60277 40 -0.58788 0.20736 41 -0.34790 0.00155 41 -0.94643 0.70339 41 -0.15364 -0.08093 42 -0.43574 -0.09746 42 -0.99451 0.73056 42 -0.72654 0.27360 43 -0.54192 0.09372 43 -0.97104 0.67356 43 -0.29501 -0.02762 44 -0.59355 0.00141 44 -0.99089 0.80167 44 -0.27950 -0.17697 45 -0.36175 0.00546 45 -0.96506 0.65936 45 -0.52056 -0.01235 46 -0.28126 -0.12729 46 -0.95940 0.73135 46 -0.27791 -0.03570 47 -0.38101 -0.11520 47 -1.02284 0.80220 47 -0.53709 0.15132 48 -0.40266 0.01926 48 -0.98871 0.71628 48 -0.67352 0.18523 49 -0.32437 -0.12521 49 -0.94682 0.61688 49 -0.32859 -0.01023 50 -0.50035 -0.06591 50 -0.95903 0.64518 50 -0.67928 0.32784 51 -0.60433 0.01095 51 -1.03389 0.83098 51 -0.64925 0.14834 52 -0.51799 0.07773 52 -1.00314 0.82995 52 -0.66853 0.31228 53 -0.48090 0.05564 53 -0.95295 0.63102 53 -0.63247 0.12414 CA 3302988 Date reçue / Received date 2026-02-25 22 54 -0.42931 0.03013 54 -1.01726 0.78784 54 -0.60638 0.08850 55 -0.27739 -0.01258 55 -1.01163 0.77350 55 -0.63517 0.26639 56 -0.29163 -0.01048 56 -0.97215 0.75941 56 -0.54070 0.00913 57 -0.23442 -0.01674 57 -0.89914 0.60645 57 -0.48909 -0.04333 58 -0.24877 -0.01570 58 -0.91978 0.64782 58 -0.23725 -0.18975 59 -0.54853 -0.03445 59 -0.98287 0.70202 59 -0.30691 -0.16622 60 -0.40867 -0.10725 60 -0.93986 0.68946 60 -0.64092 0.13619 61 -0.36700 -0.11845 61 -1.00597 0.75917 61 -0.65745 0.16056 62 -0.51270 -0.05851 62 -1.03935 0.84540 62 -0.20843 -0.19576 63 -0.58258 -0.00791 63 -1.03935 0.84538 63 -0.39310 0.02923 64 -0.53003 0.08561 64 -1.03916 0.86038 64 -0.34671 -0.14710 65 -0.30581 -0.00802 65 -1.02687 0.86751 65 -0.56972 0.04242 66 -0.46214 -0.08599 66 -0.26272 -0.16038 66 -0.32036 -0.16023 67 -0.26310 -0.01432 67 -0.21464 -0.05313 67 -0.26556 -0.18169 68 -0.49342 0.06274 68 -0.30814 -0.15188 68 -0.48251 0.09897 69 -0.42229 -0.10258 69 -0.34743 -0.01406 69 -0.56294 0.17893 70 -0.53679 -0.04277 70 -0.43621 -0.09990 70 -0.68916 0.21018 71 -0.31992 -0.00520 71 -0.43006 0.02724 71 -0.36131 0.00874 72 -0.38914 0.01432 72 -0.41670 0.01956 72 -0.61194 0.23654 73 -0.56008 -0.02585 73 -0.38947 0.00514 73 -0.29329 -0.17180 74 -0.46823 0.04881 74 -0.45625 0.04348 74 -0.69683 0.22275 75 -0.26687 -0.12691 75 -0.49417 0.06991 75 -0.62390 0.11216 76 -0.33395 -0.00200 76 -0.54779 -0.01799 76 -0.70026 0.35931 77 -0.52484 -0.05079 77 -0.24741 -0.16209 77 -0.49653 0.11166 78 -0.31003 -0.12644 78 -0.44947 -0.09205 78 -0.71187 0.24807 79 -0.44903 -0.09193 79 -0.36686 -0.13330 79 -0.22553 -0.05746 80 -0.55365 0.10206 80 -0.23204 -0.16320 80 -0.65760 0.29685 81 -0.39491 -0.11146 81 -0.40317 0.01219 81 -0.17923 -0.19951 82 -0.61494 0.02068 82 -0.27467 -0.03928 82 -0.17179 -0.07563 83 -0.58790 0.12835 83 -0.28946 -0.03493 83 -0.51024 -0.02285 84 -0.81313 0.26665 84 -0.40907 -0.11448 84 -0.73374 0.28644 85 -0.78562 0.33664 85 -0.51255 -0.04789 85 -0.42126 -0.09985 86 -0.64575 0.05092 86 -0.44325 0.03521 86 -0.37232 -0.13256 87 -0.70264 0.23723 87 -0.36159 -0.00799 87 -0.71925 0.26081 88 -0.86635 0.35219 88 -0.33781 -0.14357 88 -0.60002 0.22187 89 -0.81154 0.37118 89 -0.52451 -0.03818 89 -0.46722 -0.06305 90 -0.70325 0.11532 90 -0.27796 -0.15810 90 -0.45601 -0.07259 CA 3302988 Date reçue / Received date 2026-02-25 23 91 -0.82840 0.39451 91 -0.48797 -0.06648 91 -0.45371 0.07445 92 -0.74757 0.17201 92 -0.18421 -0.05801 92 -0.46824 0.08656 93 -0.86119 0.44183 93 -0.50645 0.07922 93 -0.55013 0.16501 94 -0.86920 0.45379 94 -0.25979 -0.04327 94 -0.68139 0.19768 95 -0.82867 0.29088 95 -0.35242 -0.13867 95 -0.22289 -0.19302 96 -0.88099 0.37697 96 -0.46907 0.05203 96 -0.58832 0.06524 97 -0.64207 0.17570 97 -0.24482 -0.04690 97 -0.18984 -0.06996 98 -0.62082 0.15628 98 -0.42274 -0.10738 98 -0.31191 -0.01912 99 -0.88823 0.38941 99 -0.30413 -0.03023 99 -0.33363 -0.15385 100 -0.74058 0.28052 100 -0.29310 -0.15525 100 -0.55052 0.02009 101 -0.69402 0.10428 101 -0.33312 -0.01979 101 -0.13538 -0.08587 102 -0.82001 0.38282 102 -0.32304 -0.14798 102 -0.59742 0.07682 103 -0.73127 0.26955 103 -0.50037 -0.05733 103 -0.44461 -0.08191 104 -0.73894 0.16050 104 -0.47535 -0.07533 104 -0.51030 0.12463 105 -0.73019 0.14906 105 -0.21664 -0.16369 105 -0.24316 -0.05062 106 -0.66550 0.07187 106 -0.31869 -0.02518 106 -0.19387 -0.19793 107 -0.63564 0.04068 107 -0.38112 -0.12746 107 -0.40863 0.04003 108 -0.84494 0.41807 108 -0.48171 0.06084 108 -0.37733 0.01880 109 -0.74979 0.29159 109 -0.46252 -0.08385 109 -0.20775 -0.06391 110 -0.82094 0.27874 110 -0.22976 -0.05019 110 -0.56020 0.03119 111 -0.72133 0.13772 111 -0.53625 -0.02820 111 -0.62366 0.25139 112 -0.60999 0.14680 112 -0.37561 -0.00159 112 -0.66554 0.17286 113 -0.85147 0.32755 113 -0.39519 -0.12118 113 -0.71049 0.37522 114 -0.62537 0.03059 114 -0.19945 -0.05574 114 -0.57909 0.05378 115 -0.71236 0.12647 115 -0.62302 0.05922 115 -0.61521 0.10029 116 -0.83671 0.40626 116 -0.67006 0.24177 116 -0.34507 -0.00094 117 -0.65570 0.06132 117 -0.57024 0.00312 117 -0.39716 -0.11677 118 -0.69286 0.22667 118 -0.68079 0.13138 118 -0.93424 0.72854 119 -0.67294 0.20589 119 -0.76088 0.36618 119 -0.86250 0.55111 120 -0.65249 0.18563 120 -0.77398 0.27287 120 -0.75933 0.45618 121 -0.66278 0.19569 121 -0.73490 0.32794 121 -0.91837 0.68732 122 -0.83634 0.30306 122 -0.55377 0.11870 122 -0.94461 0.75610 123 -0.79435 0.34809 123 -0.58116 0.01399 123 -0.80471 0.53913 124 -0.68296 0.21622 124 -0.54220 0.10851 124 -0.91300 0.67361 125 -0.76790 0.31396 125 -0.59190 0.02505 125 -0.81341 0.55592 126 -0.68466 0.09335 126 -0.60245 0.03628 126 -0.81409 0.44375 127 -0.77285 0.20701 127 -0.72493 0.19451 127 -0.90219 0.74401 CA 3302988 Date reçue / Received date 2026-02-25 24 128 -0.84394 0.31528 128 -0.61960 0.18357 128 -0.77521 0.36443 129 -0.63152 0.16591 129 -0.65261 0.09473 129 -0.87915 0.69216 130 -0.76452 0.19527 130 -0.55912 -0.00754 130 -0.89103 0.61897 131 -0.80524 0.25461 131 -0.63000 0.19494 131 -0.92371 0.70104 132 -0.75610 0.18361 132 -0.77766 0.39202 132 -0.91711 0.77876 133 -0.77681 0.32527 133 -0.68989 0.14381 133 -0.93944 0.74231 134 -0.71230 0.24790 134 -0.67155 0.11905 134 -0.77786 0.48914 135 -0.72184 0.25868 135 -0.75233 0.35336 135 -0.78843 0.39074 136 -0.75890 0.30273 136 -0.63305 0.07092 136 -0.88692 0.70941 137 -0.67515 0.08254 137 -0.68923 0.26590 137 -0.92445 0.79620 138 -0.85894 0.33985 138 -0.80467 0.32632 138 -0.89460 0.72669 139 -0.87370 0.36456 139 -0.69862 0.27812 139 -0.93170 0.81366 140 -0.85310 0.42993 140 -0.74172 0.22036 140 -0.87977 0.59176 141 -0.59902 0.13749 141 -0.78591 0.40504 141 -0.90758 0.65992 142 -0.79727 0.24262 142 -0.66027 0.22987 142 -0.79494 0.40394 143 -0.78922 0.23069 143 -0.69884 0.15635 143 -0.87406 0.57819 144 -0.78108 0.21882 144 -0.81212 0.33981 144 -0.83884 0.60663 145 -0.80298 0.35961 145 -0.65033 0.21810 145 -0.85664 0.53760 146 -1.03008 0.65625 146 -0.56516 0.12907 146 -0.76866 0.47262 147 -1.02370 0.64335 147 -0.57638 0.13963 147 -0.82200 0.57277 148 -1.01003 0.68811 148 -0.60904 0.17234 148 -0.78694 0.50574 149 -1.01693 0.70074 149 -0.59832 0.16128 149 -0.82654 0.47043 150 -0.90255 0.41439 150 -0.64024 0.20645 150 -0.83048 0.58967 151 -1.06778 0.73395 151 -0.66216 0.10683 151 -0.75483 0.32524 152 -1.04276 0.68209 152 -0.51854 0.08876 152 -0.84477 0.51066 153 -0.97485 0.62533 153 -0.53046 0.09853 153 -0.85073 0.52412 154 -0.99128 0.57910 154 -0.74367 0.34061 154 -0.76170 0.33827 155 -1.06157 0.72096 155 -0.72601 0.31535 155 -0.76849 0.35133 156 -0.99610 0.66292 156 -0.71700 0.30285 156 -0.80139 0.41718 157 -0.94582 0.57562 157 -0.76932 0.37906 157 -0.80777 0.43045 158 -0.87715 0.46579 158 -0.73339 0.20740 158 -0.90211 0.64625 159 -1.04410 0.75150 159 -0.76607 0.25965 159 -0.84710 0.62364 160 -1.04906 0.69504 160 -0.70766 0.16899 160 -0.79588 0.52240 161 -0.95119 0.50261 161 -0.79713 0.31289 161 -0.86332 0.65781 162 -0.98469 0.56631 162 -0.74995 0.23339 162 -0.94973 0.76990 163 -0.96767 0.61285 163 -0.64291 0.08276 163 -0.74985 0.43981 164 -1.07391 0.74697 164 -0.78179 0.28616 164 -0.87128 0.67497 CA 3302988 Date reçue / Received date 2026-02-25 25 165 -1.03644 0.66917 165 -0.75806 0.24648 165 -0.88543 0.60536 166 -1.00309 0.67550 166 -0.67972 0.25378 166 -0.83875 0.49723 167 -0.94437 0.48994 167 -0.70787 0.29044 167 -0.86831 0.56464 168 -0.92347 0.53867 168 -0.58743 0.15037 168 -0.74788 0.31226 169 -0.98198 0.63783 169 -0.71636 0.18171 169 -0.83267 0.48382 170 -0.91590 0.52643 170 -0.78951 0.29949 170 -0.74024 0.42352 171 -0.90059 0.50205 171 -0.61282 0.04767 171 -0.89660 0.63260 172 -1.06394 0.76964 172 -0.86217 0.43535 172 -0.72056 0.39122 173 -0.88503 0.47783 173 -0.85524 0.42159 173 -0.82034 0.45708 174 -0.93751 0.47729 174 -0.82679 0.36691 174 -0.78186 0.37757 175 -1.03060 0.72608 175 -0.79405 0.41812 175 -0.92899 0.71478 176 -1.00435 0.60475 176 -0.88258 0.47683 176 -0.90969 0.76137 177 -0.93061 0.46466 177 -0.84116 0.39418 177 -0.85526 0.64070 178 -1.03737 0.73878 178 -0.84854 0.51120 178 -0.73047 0.40733 179 -0.96044 0.60041 179 -0.92179 0.56056 179 -1.00535 0.95437 180 -1.01083 0.61760 180 -0.86904 0.44915 180 -0.96686 0.90144 181 -0.89541 0.40188 181 -0.81950 0.35334 181 -1.00358 0.92263 182 -0.93842 0.56327 182 -0.87066 0.55179 182 -0.97368 0.91908 183 -1.02378 0.71340 183 -0.81006 0.44445 183 -1.00827 0.93659 184 -0.98907 0.65036 184 -0.88926 0.49072 184 -0.93888 0.83116 185 -0.99783 0.59192 185 -0.86337 0.53822 185 -0.95301 0.86624 186 -0.97141 0.54077 186 -0.91539 0.54654 186 -0.97965 0.85302 187 -0.95797 0.51531 187 -0.90244 0.51858 187 -0.98859 0.95364 188 -0.92366 0.45205 188 -0.81793 0.45770 188 -1.00827 0.93657 189 -1.01728 0.63047 189 -0.82571 0.47100 189 -0.95985 0.79755 190 -0.91667 0.43947 190 -0.85599 0.52469 190 -0.98044 0.93674 191 -0.90963 0.42691 191 -0.84823 0.40787 191 -0.96486 0.81140 192 -1.07439 0.76103 192 -0.90895 0.53255 192 -0.98450 0.86691 193 -1.05533 0.70799 193 -0.83340 0.48435 193 -0.94599 0.84868 194 -0.96471 0.52803 194 -0.93441 0.58868 194 -0.95481 0.78372 195 -0.97807 0.55353 195 -0.80210 0.43126 195 -0.95997 0.88383 196 -1.05128 0.76393 196 -0.87584 0.46297 196 -0.99411 0.89475 197 -0.89284 0.48992 197 -0.92813 0.57461 197 -0.99886 0.90868 198 -0.95316 0.58800 198 -0.84102 0.49775 198 -0.97475 0.83913 199 -0.90828 0.51422 199 -0.83401 0.38053 199 -0.96982 0.82526 200 -0.93097 0.55095 200 -0.89588 0.50463 200 -0.98932 0.88083 CA 3302988 Date reçue / Received date 2026-02-25 26

[0039] This set of points represents a novel and unique solution to the target design criteria mentioned herein above with respect to LP nozzles of exemplified engine 10. Scaling for these points was achieved by dividing the coordinate by the local axial chord. According to at least some embodiments, the airfoil profiles defined herein are particularly configured to improve the service life of the LP nozzles of exemplified engine 10.

[0040] In general, the airfoils 100, as described herein, have a combination of axial sweep and tangential lean. Depending on configuration, the lean and sweep angles sometimes vary by up to ±10° or more. In addition, the LP nozzles are sometimes rotated with respect to a radial axis or a normal to the platform or shroud surface, for example, by up to ±10° or more.

[0041] Novel aspects of the LP nozzles and associated airfoil surfaces described herein are achieved by substantial conformance to specified geometries. Substantial conformance generally includes or may include a manufacturing tolerance of about ±0.004 inches and / or ± 0.05 inches, in order to account for variations in molding, cutting, shaping, surface finishing and other manufacturing processes, and to accommodate variability in coating thicknesses. This tolerance is generally constant or not scalable, and applies to each of the specified LP nozzle surfaces, regardless of size.

[0042] Substantial conformance is based on sets of points representing a three-dimensional surface with particular physical dimensions, for example, in inches or millimeters, as determined by selecting particular values of the scaling parameters. A substantially conforming airfoil, blade, or vane structure has surfaces that conform to the specified sets of points, within the specified tolerance.

[0043] Alternatively, substantial conformance is based on a determination by a national or international regulatory body, for example, in a part certification or part manufacture approval (PMA) process for the Federal Aviation Administration, the European Aviation Safety Agency, the Civil Aviation Administration of China, the Japan Civil Aviation Bureau, or the Russian Federal Agency for Air Transport. In these configurations, substantial conformance encompasses a determination that a particular part or structure is identical to, or sufficiently similar to, the specified airfoil, blade, or vane, or that the part or structure complies with airworthiness standards applicable to the specified blade, vane, or airfoil. In particular, substantial conformance encompasses any regulatory determination that a particular part or structure is sufficiently similar CA 3302988 Date reçue / Received date 2026-02-25 27 to, identical to, or the same as a specified blade, vane, or airfoil, such that certification or authorization for use is based at least in part on the determination of similarity.

[0044] Further aspects of the present disclosure are provided by the subject matter of the following clauses.

[0045] A power turbine nozzle for a gas turbine engine, the power turbine nozzle comprising: an airfoil having a leading edge and a trailing edge joined by a pressure side and a suction side to provide an external airfoil surface configured to extend from a platform of the gas turbine engine in a spanwise direction to a tip. The external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by a set of Cartesian coordinates set forth in one of Tables 1 to 3, the Cartesian coordinates provided by an axial coordinate scaled by a local axial chord, a circumferential coordinate scaled by the local axial chord, and a span location, wherein the local axial chord corresponds to a width of the airfoil between the leading edge and the trailing edge at the span location.

[0046] The power turbine nozzle according to the preceding clause, wherein the power turbine nozzle is a third-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 1.

[0047] The power turbine nozzle according to any of the preceding clauses, wherein the power turbine nozzle is a fourth-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 2.

[0048] The power turbine nozzle according to any of the preceding clauses, wherein the power turbine nozzle is a fifth-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 3.

[0049] The power turbine nozzle according to any of the preceding clauses, wherein the span location corresponds to a distance from a rotation axis of the airfoil.

[0050] The power turbine nozzle according to any of the preceding clauses, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.004 inches. CA 3302988 Date reçue / Received date 2026-02-25 28

[0051] The power turbine nozzle according to any of the preceding clauses, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.05 inches.

[0052] The power turbine nozzle according to any of the preceding clauses, wherein the Cartesian coordinates define points on a cold, uncoated airfoil surface at nominal restagger, in a plane at the span location.

[0053] A power turbine nozzle for a gas turbine engine, the power turbine nozzle including at least one of a third-stage nozzle, a fourth-stage nozzle, or a fifth-stage nozzle, the power turbine nozzle comprising: a platform and an airfoil extending in a spanwise direction from the platform to a tip shroud, the airfoil having an external airfoil surface formed in conformance with multiple cross-section airfoil profiles described by a set of Cartesian coordinates set forth in one of Tables 1 to 3.

[0054] The power turbine nozzle according to the preceding clause, wherein the Cartesian coordinates in each of Tables 1 to 3 have Cartesian coordinate values for a cold, uncoated condition at nominal restagger.

[0055] The power turbine nozzle according to any of the preceding clauses, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.004 inches.

[0056] The power turbine nozzle according to any of the preceding clauses, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.05 inches.

[0057] The power turbine nozzle according to any of the preceding clauses, wherein the airfoil has a leading edge and a trailing edge joined by a pressure side and a suction side to provide the external airfoil surface.

[0058] The power turbine nozzle according to any of the preceding clauses, wherein the Cartesian coordinates are provided by an axial coordinate scaled by a local axial chord, a circumferential coordinate scaled by the local axial chord, and a span location, wherein the local axial chord corresponds to a width of the airfoil between the leading edge and the trailing edge at the span location.

[0059] The power turbine nozzle according to any of the preceding clauses, wherein the power turbine nozzle is a third-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 1. CA 3302988 Date reçue / Received date 2026-02-25 29

[0060] The power turbine nozzle according to any of the preceding clauses, wherein the power turbine nozzle is a fourth-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 2.

[0061] The power turbine nozzle according to any of the preceding clauses, wherein the power turbine nozzle is a fifth-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 3.

[0062] The power turbine nozzle according to any of the preceding clauses, wherein the span location corresponds to a distance from a rotation axis of the airfoil.

[0063] The power turbine nozzle according any of the preceding clauses, wherein the Cartesian coordinates define points on a cold, uncoated airfoil surface at nominal restagger, in a plane at the span location

[0064] A gas turbine engine comprising: a power turbine nozzle having an array of airfoils, wherein at least one airfoil of the array of airfoils has a leading edge and a trailing edge that are joined by spaced-apart pressure and suction sides to provide an external airfoil surface extending from a platform in a span direction to a tip shroud. The external airfoil surface is formed in conformance with multiple cross-section profiles of the at least one airfoil described by a set of Cartesian coordinates set forth in one of Tables 1 to 3, the Cartesian coordinates provided by an axial coordinate scaled by a local axial chord, a circumferential coordinate scaled by the local axial chord, and a span location, wherein the local axial chord corresponds to a width of the at least one airfoil between the leading edge and the trailing edge at the span location.

[0065] The gas turbine engine according to the preceding clause, wherein the span location corresponds to a distance from a rotation axis of the at least one airfoil.

[0066] The gas turbine engine according to any of the preceding clauses, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.004 inches.

[0067] The gas turbine engine according to any of the preceding clauses, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.05 inches. CA 3302988 Date reçue / Received date 2026-02-25 30

[0068] The gas turbine engine according to any of the preceding clauses, wherein the Cartesian coordinates define points on a cold, uncoated airfoil surface of the at least one airfoil at nominal restagger, in a plane at the span location.

[0069] The gas turbine engine according to any of the preceding clauses, wherein the power turbine nozzle is at least one of a third-stage nozzle, a fourth-stage nozzle, or a fifth-stage nozzle.

[0070] Persons skilled in the art will understand that the structures and methods specifically described herein and shown in the accompanying figures are non-limiting exemplary aspects, and that the description, disclosure, and figures should be construed merely as exemplary of aspects. It is to be understood, therefore, that the present disclosure is not limited to the precise aspects described, and that various other changes and modifications may be effected by one skilled in the art without departing from the scope or spirit of the disclosure. Additionally, the elements and features shown or described in connection with certain aspects may be combined with the elements and features of certain other aspects without departing from the scope of the present disclosure, and that such modifications and variations are also included within the scope of the present disclosure. Accordingly, the subject matter of the present disclosure is not limited by what has been particularly shown and described. CA 3302988 Date reçue / Received date 2026-02-25

Claims

31 WHAT IS CLAIMED IS:

1. A power turbine nozzle for a gas turbine engine, the power turbine nozzle comprising: an airfoil having a leading edge and a trailing edge joined by a pressure side and a suction side to provide an external airfoil surface configured to extend from a platform of the gas turbine engine in a spanwise direction to a tip; and wherein the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by a set of Cartesian coordinates set forth in one of Tables 1 to 3, the Cartesian coordinates provided by an axial coordinate scaled by a local axial chord, a circumferential coordinate scaled by the local axial chord, and a span location, wherein the local axial chord corresponds to a width of the airfoil between the leading edge and the trailing edge at the span location.

2. The power turbine nozzle according to claim 1, wherein the power turbine nozzle is a third-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 1.

3. The power turbine nozzle according to claim 1, wherein the power turbine nozzle is a fourth-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 2.

4. The power turbine nozzle according to claim 1, wherein the power turbine nozzle is a fifth-stage nozzle and the external airfoil surface is formed in conformance with multiple cross-section profiles of the airfoil described by the set of Cartesian coordinates set forth in Table 3.

5. The power turbine nozzle according to claim 1, wherein the span location corresponds to a distance from a rotation axis of the airfoil. CA 3302988 Date reçue / Received date 2026-02-25 32 6. The power turbine nozzle according to claim 1, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.004 inches.

7. The power turbine nozzle according to claim 1, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.05 inches.

8. The power turbine nozzle according to claim 1, wherein the Cartesian coordinates define points on a cold, uncoated airfoil surface at nominal restagger, in a plane at the span location.

9. A power turbine nozzle for a gas turbine engine, the power turbine nozzle including at least one of a third-stage nozzle, a fourth-stage nozzle, or a fifth-stage nozzle, the power turbine nozzle comprising: a platform; and an airfoil extending in a spanwise direction from the platform to a tip shroud, the airfoil having an external airfoil surface formed in conformance with multiple cross-section airfoil profiles described by a set of Cartesian coordinates set forth in one of Tables 1 to 3.

10. The power turbine nozzle according to claim 9, wherein the Cartesian coordinates in each of Tables 1 to 3 have Cartesian coordinate values for a cold, uncoated condition at nominal restagger.

11. The power turbine nozzle according to claim 9, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.004 inches.

12. The power turbine nozzle according to claim 9, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.05 inches.

13. A gas turbine engine comprising: a power turbine nozzle having an array of airfoils, wherein at least one airfoil of the array of airfoils has a leading edge and a trailing edge that are joined by spaced-apart pressure and CA 3302988 Date reçue / Received date 2026-02-25 33 suction sides to provide an external airfoil surface extending from a platform in a span direction to a tip shroud; and wherein the external airfoil surface is formed in conformance with multiple cross-section profiles of the at least one airfoil described by a set of Cartesian coordinates set forth in one of Tables 1 to 3, the Cartesian coordinates provided by an axial coordinate scaled by a local axial chord, a circumferential coordinate scaled by the local axial chord, and a span location, wherein the local axial chord corresponds to a width of the at least one airfoil between the leading edge and the trailing edge at the span location.

14. The gas turbine engine according to claim 13, wherein the span location corresponds to a distance from a rotation axis of the at least one airfoil.

15. The gas turbine engine according to claim 13, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.004 inches.

16. The gas turbine engine according to claim 13, wherein the Cartesian coordinates in each of Tables 1 to 3 have a tolerance of ±0.05 inches.

17. The gas turbine engine according to claim 13, wherein the Cartesian coordinates define points on a cold, uncoated airfoil surface of the at least one airfoil at nominal restagger, in a plane at the span location.

18. The gas turbine engine according to claim 13, wherein the power turbine nozzle is at least one of a third-stage nozzle, a fourth-stage nozzle, or a fifth-stage nozzle. CA 3302988 Date reçue / Received date 2026-02-25