A method for interrupted landing test flights applicable to tropospheric manned airships

Abstract

This invention discloses a method for aborted landing test flights applicable to tropospheric manned airships, comprising the following steps: Step 1: Selecting test conditions; Step 2: Reducing throttle and maneuvering down the elevator; Step 3: Descent into the predetermined landing point range; Step 4: Pulling the elevator lever all the way back and holding it, pushing the throttle to maximum continuously, maintaining a positive climb rate for a set time to complete the maneuver; Step 5: Normal return and landing. This invention fills the gap in test flight methods for aborted landing type certification of tropospheric manned airships.

Description

Technical Field

[0001] This invention belongs to the field of airship test flight technology, and in particular relates to a method for interrupted landing test flights applicable to tropospheric manned airships. Background Technology

[0002] The Civil Aviation Administration of China (CAAC) issued the type certification for the airship (AC-21-AA-2009-09R1), which adopted Article 2.12 of the (FAA P-8110-2) airship design guidelines for aborted landing. The guidelines explicitly require the airship to demonstrate and verify its ability to glide and land at maximum landing weight and then transition to an aborted landing climb. No special piloting skills are required during this process, and the airship must not descend excessively. The airship's configuration at this time includes: auxiliary gasbags deployed for glide and landing trim, and landing gear in the down position.

[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 method for interrupted landing test flights applicable to tropospheric manned airships.

[0006] Invention Technology Solutions

[0007] A method for aborted landing test flights applicable to tropospheric manned airships includes the following steps:

[0008] Step 1: Select experimental conditions;

[0009] Step 2: Reduce throttle and use the elevator to maneuver downwards;

[0010] Step 3: Descend into the designated landing area;

[0011] Step 4: Pull the elevator lever all the way down and hold it, push the throttle to the maximum continuously, and hold the positive climb rate for the set time to complete the operation;

[0012] Step 5: Return to base and land normally.

[0013] Preferably, the maximum landing weight and front center of gravity of the airship are selected as the test conditions in the first step.

[0014] Preferably, the time set in the third step is 5 seconds.

[0015] Preferably, the second step is performed after the airship takes off normally and climbs to the set altitude.

[0016] Preferably, in the third step, when the plane descent enters the predetermined landing point range, the landing recovery maneuver is executed at a set altitude, and then the fourth step is performed.

[0017] Preferably, the entire test flight process must ensure that the airship is easy to control during the transition from landing approach to aborted landing recovery and climb.

[0018] Preferably, the entire test flight process must also meet the requirement that the pilot does not need special flying skills.

[0019] Preferably, the entire test flight process must also meet the pilot's expectations regarding the airship's descent and attitude changes during the test flight.

[0020] Preferably, the entire test flight process must also meet the requirement that after the landing is interrupted and the flight is converted to a stable climb, the climb gradient is not less than 1 / 30.

[0021] Advantages of this invention: This invention fills the gap in the test flight method for the qualification certification of tropospheric manned airships during aborted landing, realizes a repeatable and standardized test flight scheme, forms unified verification requirements, and improves the test flight efficiency and quality of tropospheric manned airships during aborted landing. Attached Figure Description

[0022] Figure 1 This is a flowchart of a method for interrupted landing test flights applicable to tropospheric manned airships according to the present invention. Detailed Implementation

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

[0024] A method for aborted landing test flights of manned tropospheric airships, comprising the following steps:

[0025] Step 1: Select the airship's maximum landing weight and front center of gravity as the test conditions;

[0026] Step 2: Reduce throttle and use the elevator to maneuver downwards;

[0027] Step 3: Descend into the designated landing area;

[0028] Step 4: Pull the elevator lever all the way and hold it, push the throttle to the maximum continuously, and hold the positive climb rate for 5 seconds to complete the action;

[0029] Step 5: Return to base and land normally;

[0030] Step Six: The process of transitioning the airship from landing approach to aborted landing and subsequent climb is easy to control and does not require special flight skills. During this process, the airship's descent and attitude changes are in line with the pilot's expectations. After aborting landing and stabilizing the climb, the climb gradient should not be less than 1 / 30. Special flight skills refer to piloting techniques that exceed the operational capabilities of ordinary pilots and require special training to master.

[0031] Implementation Example: The test flight process for the type certification of a manned airship during aborted landing is as follows:

[0032] 1) Before the test, set the weight, center of gravity position, etc. according to the test requirements;

[0033] 2) The airship took off normally and climbed to an altitude of 100m;

[0034] 3) When the airship is at an altitude of 100m, adjust the bow to face the wind, reduce the throttle and start the approach and descent in combination with the elevator. Adjust the descent speed to about 50km / h and stabilize the descent with a pitch angle of about -10°.

[0035] 4) When the plane glides into the area of ​​the predetermined landing point, the landing recovery maneuver shall be performed when the altitude is not less than 20m.

[0036] 5) Pull the elevator lever all the way down and hold it, push the throttle to the maximum continuously, and hold the positive climb rate for 5 seconds to complete the action;

[0037] 6) Adjust altitude, return to base normally, and land;

[0038] 7) The process of transitioning from landing approach to aborted landing and recovery is easy to control, requiring no special flying skills. During this period, the airship's descent and attitude changes are in line with the pilot's expectations.

[0039] After aborting the landing and resuming a stable climb, the climb gradient should be no less than 1 / 30.

[0040] 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 interrupted landing test flights applicable to tropospheric manned airships, characterized in that, Includes the following steps: Step 1: Select experimental conditions; Step 2: Reduce throttle and use the elevator to maneuver downwards; Step 3: Descend into the designated landing area; Step 4: Pull the elevator lever all the way down and hold it, push the throttle to the maximum and run continuously. When the climb rate is positive, hold it for the set time to complete the operation. Step 5: Return to base and land normally.

2. The method for interrupted landing test flights applicable to tropospheric manned airships as described in claim 1, characterized in that, In the first step, the maximum landing weight and front center of gravity of the airship were selected as the test conditions.

3. The method for interrupted landing test flights applicable to tropospheric manned airships as described in claim 1, characterized in that, The time set in step four is 5 seconds.

4. The method for interrupted landing test flights applicable to tropospheric manned airships as described in claim 1, characterized in that, After the airship takes off normally and climbs to the set altitude, the second step will be carried out.

5. The method for interrupted landing test flights applicable to tropospheric manned airships as described in claim 1, characterized in that, The third step is to perform an abort landing and recovery maneuver at a set altitude when the plane is descending into the area of ​​the predetermined landing point, and then proceed to the fourth step.

6. The method for interrupted landing test flights applicable to tropospheric manned airships as described in claim 1, characterized in that, The entire test flight process must ensure that the airship is easy to control during the transition from landing approach to aborted landing recovery and climb.

7. The method for interrupted landing test flights of a tropospheric manned airship as described in claim 6, characterized in that, The entire test flight process must also meet the requirement that the pilot does not need special flying skills.

8. The method for interrupted landing test flights of a tropospheric manned airship as described in claim 7, characterized in that, The entire test flight process also needs to ensure that the airship's descent and attitude changes during the test flight meet the pilot's expectations.

9. A method for interrupted landing test flights applicable to tropospheric manned airships as described in claim 8, characterized in that, The entire test flight process must also meet the requirement that after the landing is interrupted and the flight is converted to a stable climb, the climb gradient is not less than 1 / 30.

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