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research-article

Design and Testing of a Crashworthy Landing Gear

[+] Author and Article Information
Tae-uk Kim

Korea Aerospace Research Institute, 169-84 Gwahangno, Daejeon 305-806, South Korea
tukim@kari.re.rk

JeongWoo Shin

Korea Aerospace Research Institute, 169-84 Gwahangno, Daejeon 305-806, South Korea
jeongdal@kari.re.kr

Sang Wook Lee

Korea Aerospace Research Institute, 169-84 Gwahangno, Daejeon 305-806, South Korea
lsw@kari.re.kr

1Corresponding author.

ASME doi:10.1115/1.4036663 History: Received January 28, 2016; Revised April 24, 2017

Abstract

The development of a crashworthy landing gear is presented based on the civil regulations and the military specifications. For this, two representative crashworthy requirements are applied to helicopter landing gear design; the nose gear is designed to collapse in a controlled manner so that it does not penetrate the cabin and cause secondary hazards, and the main gear has to absorb energy as much as possible in crash case to decelerate the aircraft. To satisfy the requirements, the collapse mechanism triggered by shear-pin rupture and the shock absorber using blow-off valve are implemented in the nose and main gear, respectively. The crash performance of landing gear is demonstrated by drop tests. In the tests, performance data such as ground reaction loads and shock absorber stroke are measured and crash behaviors are recorded by high-speed camera. The test data shows a good agreement with the prediction by simulation model, which proves the validity of the design and analysis.

Copyright (c) 2017 by ASME
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