Cutting method for emergency opening lock catch of passenger plane test flight service cabin door

Abstract

The invention discloses a cutting method for a lock catch when a service door is emergently opened during test flight of passenger plane. The method includes the followings: (1) choice of cutting position: the cutting position is chosen to be at the inner side of the lock catch close to the edge of the service door; (2) determination of incision parameters: the incision is U-shaped, and the length and the width are respectively equal to the width and depth of a U-shaped groove of the lock catch; (3) choice of cutter: a flexible cutter is used, and the cutting ability is 1.25-1.35 times of the maximum thickness among three sections of the lock catch; (4) installation of cutter: the cutter is configured to be U-shaped and tightly stuck with the surface of the inner side of the lock catch; (5) initiation of cutter: after an insensitive electric detonator receives signals of explosion initiation, a silver micro-primacord fuse is initiated, and the primacord fuse is connected with the cutter through an energy amplifier; the energy amplifier carries out initiation on the cutter and cuts off the lock catch. The cutting method of the lock catch in the invention is fast and high-efficient, thereby avoiding the defect of connection of a plurality of cutters and having the benefit for the safety of test flight staff.

Description

technical field [0001] The invention relates to a method for cutting locks when a flight test service cabin door of an airliner is opened in an emergency. Background technique [0002] According to Article 15 (4) of CCAR-21R2 "Regulations on Certification of Civil Aviation Products and Parts", "except for glider or manned balloon, the applicant shall prove that sufficient measures have been taken for each flight test so that Members of the flight test team were able to disembark and use parachutes 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 must be able to release the emergency pressure in the cabin of the aircraft in accordance with the captain's instructions and actions when necessary, release the restraint betwe...

AI Technical Summary

Problems solved by technology

[0003] In addition, it is required that during the blasting process, the personnel on board should not be harmed, the structure of other parts of the aircraft and equipment on board should not be damaged, and the flight attitude of the aircraft should not be unacceptably affected.

Images