Cutting method for plane body cover during emergency decompression in passenger plane test flight

Abstract

The invention discloses a method for cutting a fuselage skin under the condition of emergent pressure release of test flight of a passenger plane. The method comprises the following steps: firstly, a cutting position is selected to be on the rear of an engine room and bilaterally symmetrical with an axial line of a fuselage; secondly, the shape of a cut is a closed rectangle or a closed circle; thirdly, the cutting ability of a cutter is 1.25 to 1.35 times of the thickness of a cutting object; fourthly, the cutter is set to take the shape of the closed circle or the closed rectangle; and fifthly, after an insensitive electric detonator receives a priming signal, a fine silver detonating cord is primed and connected with the cutter through an energy amplifier which primes the cutter and cuts off the fuselage skin. The method is a quick and high-efficiency pressure release method, reduces the explosive amount, guarantees that an engine is not harmed by a skin block, is favorable for the safety of personnel in a test flight group, and can guarantee that the stability of the flight attitude of the plane is not influenced by the pressure release process due to synchronous priming.

Description

technical field [0001] The invention relates to a cutting method of fuselage skin during high-altitude emergency pressure relief of passenger aircraft. Background technique [0002] According to the provisions of Article 15 (4) of CCAR-21R2 "Civil Aviation Products and Parts Certification Regulations", "except for glider or manned balloon, the applicant shall prove that sufficient measures have been taken for each flight test, So that the members of the flight test team can get out of the plane and use the parachute in an emergency;... ". In order to ensure the safety of the flight test team members during the flight test of the large passenger aircraft, it is necessary to equip the flight test aircraft with an in-flight emergency opening system for the service hatch. The "system" adopts precise blasting technology, and can act in time according to the captain's instructions when necessary, so as to release the emergency pressure in the aircraft cabin, release the constrain...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: the purpose of the present invention is aimed at the structural characteristics of the existing fuselage skin, to provide a cutting method for the fuselage skin during the emergency pressure relief of a passenger aircraft flight test, to solve the emergency pressure relief problem in the aircraft cabin, and to relieve the pressure inside and outside the service cabin. The pressure difference between them opens up a barrier-free passage for the flight test team members to evacuate

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