Gimbaled Spinner Fairing Assembly for Tilt Rotor Drag Reduction
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Solution Overview
Problem
Conventional spinner fairings with fixed orientations and large cutouts for hardware connections degrade aerodynamic performance by increasing drag in rotor systems, such as tilt rotor aircraft, due to the need for clearance during operations like flapping and feathering.
Innovation Solution
A spinner fairing assembly with a gimbaled yoke and spinner base that can transition between neutral and canted positions, allowing for reduced port sizes and improved aerodynamic surfaces by maintaining alignment in neutral positions and adjusting axes during operation, thereby minimizing exposure and drag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional fixed spinner fairings are used with large cutouts for hardware connections, then operational functionality is maintained, but aerodynamic drag increases and performance degrades
Solution Approach 1:
The spinner fairing transitions from a fixed structure to a dynamic structure that can change its configuration. The fairing includes movable panels or flaps that can be positioned in different states (retracted, extended, intermediate) to adapt to operational requirements while minimizing drag during non-operational phases
Solution Approach 2:
The spinner fairing is divided into multiple segments or panels that can move independently. This segmentation allows specific portions to be adjusted for hardware clearance during operations while maintaining a streamlined continuous surface during normal flight, effectively resolving the drag issue without sacrificing operational functionality
2Adaptability or versatility
If large fairing cutouts are provided for hardware connections and range of motion, then operational range is maintained, but aerodynamic performance and drag reduction capability are degraded
Solution Approach 1:
The fairing incorporates dynamically adjustable panels that can be reconfigured based on operational needs. During operations requiring range of motion, specific panels extend to provide necessary clearance. During normal flight, all panels are retracted to maintain a smooth aerodynamic surface, thus achieving both adaptability and drag reduction
Solution Approach 2:
Instead of providing large cutouts throughout the fairing, the invention applies local adjustments only where and when needed. Specific localized panels or flaps can extend to provide clearance for hardware connections during operations, while the majority of the fairing surface remains continuous and streamlined, minimizing overall drag
Data Source
AI summary
An apparatus comprising a spinner fairing assembly comprising a spinner configured to be fixed relative to a gimbaled yoke coupled to a mast system, and a spinner base configured to be fixed relative to the mast system. A spinner fairing assembly comprising a spinner aligned along a first axis, and a spinner base aligned along a second axis and configured to interface with the spinner, wherein the spinner is configured to transition between a neutral position and a canted position with respect to the spinner base, wherein the first axis and the second axis are coincident in the neutral position, and wherein the first axis and the second axis are not coincident and meet at an origin within the spinner in the canted position.