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NASA Technical Note
None
Investigation of the Air-compression Process During Drop Tests of an Oleo-pneumatic Landing Gear
A brief study has been made to evaluate the importance of the type of air-compression process on the loads produced on an oleo-pneumatic landing gear during impact and to determine the type of air compression process actually obtained during drop tests. A simplified analysis to determine the effect which different air-compression processes might have indicates that the value of the air-compression exponent should have relatively little effect on the landing-gear loads throughout most of the impact. The analysis of experimental data obtained in these tests shows that the polytropic exponent ranged from 1.01 to 1.10 for the condtions tested. The general trend of the data appears relatively independent of vertical contact velocity.
