A single-engine parking climb performance test flight method suitable for tropospheric manned airships

Abstract

This invention discloses a single-engine shutdown climb performance test method suitable for tropospheric manned airships. The method involves first taking off the airship according to a conventional flight procedure, climbing to a selected altitude, and then transitioning to level flight. The heading angle is adjusted, and one engine is set to idle while the other operates at maximum continuous power. Once the left and right engine speeds stabilize, stable level flight is maintained. Using the engine speeds maintained in the third step, the airship is maneuvered to climb to a designated altitude. During the climb, the vertical speed is monitored to ensure a stable climb rate, the gasbag pressure remains within the normal range, and the gasbag pressure system is in automatic control mode. The throttle is then adjusted to normal, the airship's state is adjusted, and the airship descends along a normal flight path to the initial selected altitude. This method improves the efficiency and quality of single-engine shutdown climb performance tests for tropospheric manned airships.

Description

Technical Field

[0001] This invention belongs to the field of airship test flight technology, and in particular relates to a single-engine shutdown climb performance test flight method suitable for tropospheric manned airships. Background Technology

[0002] The Civil Aviation Administration of China issued the type certification for the airship (AC-21-AA-2009-09R1), which adopted Article 2.9 of the (FAAP-8110-2) airship design guidelines, which specifies the single-engine shutdown climb performance and clearly requires that the sea-level steady climb rate of multi-engine airships must be at least 100 feet per minute.

[0003] Currently, China lacks flight test technologies and methods for the qualification certification of tropospheric airships. There is a need to implement repeatable and standardized flight test requirements for airships, standardizing flight test weight, center of gravity, procedures, and methods to form unified verification requirements and improve the efficiency and quality of manned airship flight tests. Summary of the Invention

[0004] Purpose of the invention

[0005] In order to improve the efficiency and quality of manned airship test flights, this invention provides a single-engine shutdown climb performance test flight method suitable for tropospheric manned airships.

[0006] Invention Technology Solutions

[0007] A single-engine shutdown climb performance test method suitable for tropospheric manned airships includes the following steps:

[0008] Step 1: Selecting airship test conditions;

[0009] Step 2: Take off according to the conventional flight procedure. After the airship climbs to the selected field altitude, it changes to level flight.

[0010] Step 3: Adjust the heading angle, select one engine to idle and the other engine to maximum continuous power, and continue to maintain stable level flight after the left and right engine speeds stabilize.

[0011] Step 4: Using the engine speed maintained in Step 3, maneuver the airship to climb to the designated altitude;

[0012] Step 5: Monitor whether the vertical speed reaches a stable climbing rate during the climbing process, whether the airbag pressure remains within the normal range, and whether the airbag pressure system is in automatic control mode;

[0013] Step 6: Adjust the throttle to normal, adjust the airship's status, and let the airship descend to the initially selected altitude along the normal route.

[0014] Preferably, the maximum static weight and forward center of gravity of the airship are selected as the experimental conditions in the first step.

[0015] Preferably, in the third step, the opposite heading is adopted, and the engine is set to maximum continuous power while the other engine is idling. Once the speeds of the left and right engines stabilize, stable level flight is maintained. Then, the fourth and fifth steps are repeated to complete the idling test flight of the other engine.

[0016] Preferably, in the fourth step, the airship climbs at a rate of climb of not less than 1 m / s.

[0017] Preferably, in the fifth step, the stable climb rate is a climb rate of not less than 0.5 m / s.

[0018] Preferably, if any condition in step five is not met, the test flight is repeated; if all conditions are met, step six is ​​continued.

[0019] Preferably, the third step is performed after the airship has been flying stably at level for more than 10 seconds in the second step.

[0020] Preferably, the airship's display instruments can show the climb rate in real time.

[0021] Advantages of this invention: This invention fills the gap in the test flight method for the single-engine shutdown climb performance of tropospheric manned airships, realizes a repeatable and standardized test flight scheme, forms unified verification requirements, and improves the test flight efficiency and test flight quality of the single-engine shutdown climb performance of tropospheric manned airships. Attached Figure Description

[0022] Figure 1 This is a flowchart of a single-engine shutdown climb performance test method for a tropospheric manned airship, according to the present invention. Detailed Implementation

[0023] The present invention is achieved through the following technical solution.

[0024] A single-engine shutdown climb performance test method suitable for tropospheric manned airships includes the following steps:

[0025] Step 1: Select airship test conditions; preferably, the maximum static weight and forward center of gravity of the airship selected in Step 1 are the test conditions.

[0026] Step 2: Take off according to the conventional flight procedure. After the airship climbs to the selected field altitude, it changes to level flight.

[0027] Preferably, the third step is performed after the airship has been flying stably at level for more than 10 seconds in the second step.

[0028] Step 3: Adjust the heading angle, select one engine to idle and the other engine to maximum continuous power, and continue to maintain stable level flight after the left and right engine speeds stabilize.

[0029] Step 4: Using the engine speed maintained in Step 3, maneuver the airship to climb to the designated altitude;

[0030] Preferably, in the fourth step, the airship climbs at a rate of climb of not less than 1 m / s.

[0031] Preferably, the airship's display instruments can show the climb rate in real time.

[0032] Step 5: Monitor whether the vertical speed reaches a stable climbing rate during the climbing process, whether the airbag pressure remains within the normal range, and whether the airbag pressure system is in automatic control mode;

[0033] Preferably, in the fifth step, the stable climb rate is a climb rate of not less than 0.5 m / s.

[0034] Preferably, if any condition in step five is not met, the test flight is repeated; if all conditions are met, step six is ​​continued.

[0035] Step 6: Adjust the throttle to normal, adjust the airship's status, and let the airship descend to the initially selected altitude along the normal route.

[0036] After completing the engine's idle flight test, the third step involves adopting the opposite heading and setting the engine to maximum continuous power while the other engine idles. Once the left and right engine speeds stabilize, continue maintaining stable level flight. Then, repeat the fourth and fifth steps to complete the idle flight test of the other engine.

[0037] Take the single-engine shutdown climb performance test flight process of a manned airship as an example.

[0038] A single-engine shutdown climb performance test method suitable for tropospheric manned airships includes the following steps:

[0039] (1) Before the test, set the weight, center of gravity position, etc. according to the test requirements;

[0040] (2) The airship takes off normally and climbs to an altitude of 150m, and remains stable in level flight for more than 10 seconds;

[0041] (3) Adjust the heading angle of the airship, put the right engine in the off state (simulating single engine failure), increase the power of the left engine to the maximum continuous power, and wait for the speed of the left and right engines to stabilize, and maintain stable level flight for more than 10 seconds.

[0042] (4) Maneuver the airship to climb with the right engine at idle speed and the left engine at maximum continuous power (stable speed) with a single engine, and climb to about 500m at a climb rate of not less than 1m / s.

[0043] (5) Monitor whether the vertical speed during the climb is not less than 0.5 m / s, whether the airbag pressure is kept within the normal range, and whether the airbag pressure system is in automatic control mode. If any of the above conditions are not met, the test flight shall be repeated. If all the above conditions are met, the subsequent test flight shall continue.

[0044] (6) After the test mission of the right engine idling speed and the left engine maximum continuous power is completed, adjust the throttle of both engines to the normal state, adjust the state of the airship, and the airship descends to the field height of 150m according to the normal route.

[0045] (7) Using the same operation but with the opposite heading, complete the single-engine climb with the left engine at idle speed and the right engine at maximum continuous power. Repeat steps (3), (4), and (5).

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent transformations or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention. The technologies, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A method for single-engine shutdown climb performance test flight of a tropospheric manned airship, characterized in that, Includes the following steps: Step 1: Selecting airship test conditions; Step 2: Take off according to the conventional flight procedure. After the airship climbs to the selected field altitude, it changes to level flight. Step 3: Adjust the heading angle, select one engine to idle and the other engine to run at maximum continuous power, and continue to maintain stable level flight after the left and right engine speeds stabilize. Step 4: Using the engine speed maintained in Step 3, maneuver the airship to climb to the designated altitude; Step 5: Monitor whether the vertical speed reaches a stable climbing rate during the climbing process, whether the airbag pressure remains within the normal range, and whether the airbag pressure system is in automatic control mode; Step 6: Adjust the throttle to normal, adjust the airship's status, and let the airship descend to the initially selected altitude along the normal route.

2. The single-engine shutdown climb performance test method for a tropospheric manned airship as described in claim 1, characterized in that, In the first step, the maximum static weight and front center of gravity of the airship were selected as the experimental conditions.

3. The single-engine shutdown climb performance test method for a tropospheric manned airship as described in claim 1, characterized in that, After completing the engine's idle flight test, the third step involves adopting the opposite heading and running the engine at maximum continuous power while the other engine idles. Once the left and right engine speeds stabilize, continue to maintain stable level flight. Then, repeat the fourth and fifth steps to complete the idle flight test of the other engine.

4. The single-engine shutdown climb performance test method for a tropospheric manned airship as described in claim 1, characterized in that, In the fourth step, the airship climbs at a rate of climb of no less than 1 m / s.

5. The single-engine shutdown climb performance test method for a tropospheric manned airship as described in claim 1, characterized in that, In step five, the stable climb rate is no less than 0.5 m / s.

6. The single-engine shutdown climb performance test method for a tropospheric manned airship as described in claim 1, characterized in that, If any condition in step five is not met, the test flight must be repeated. Once all conditions are met, proceed to step six.

7. A single-engine shutdown climb performance test flight method for a tropospheric manned airship as described in claim 1, characterized in that, In the second step, the airship must maintain stable level flight for more than 10 seconds before proceeding to the third step.

8. A single-engine shutdown climb performance test flight method for a tropospheric manned airship as described in claim 1, characterized in that, The airship's display instruments can show the climb rate in real time.

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