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Technical Note

Optimisation of vibration absorbers for aircraftcannon

Published online by Cambridge University Press:  04 July 2016

P.S. Heyns  and
W.N.v.d.S. Benadé
P.S. Heyns
Affiliation:
Department of Mechanical and Aeronautical EngineeringUniversity of Pretoria, South Africa
W.N.v.d.S. Benadé
Affiliation:
Department of Mechanical and Aeronautical EngineeringUniversity of Pretoria, South Africa
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Extract

It is widely accepted that the effectiveness of cannonin the air-to-air combat scenarío depends on therate of fire. Present firing rates for 20-30 mmaircraft cannon range from 600 to 1500 rounds perminute. New developments are aimed towards evenhigher rates of fire. With these higher rates offire more energy is likely to be transferred to theaircraft fuselage, resulting in possible structuralfatigue damage. To absorb the recoil forces severaltypes of recoil system have been developed and arepresently in use. Conventional recoil systems arenot, however, ideal for very high rates of fire andhence alternatives must be investigated.

With this work the use of an anti-resonant device toreduce the transmission of forces to the aircraftfuselage for a high rate of fire is investigated.Antiresonant isolators operate on the principle thata condition of little or no motion may be enforcedat specific points of interest on a system atparticular frequencies, through suitable tuning ofthe system. This is essentially achieved bydesigning the isolator system in such a way thatinertial forces are used to react spring forcesunder stationary conditions.

Information

Type
Research Article
Information
The Aeronautical Journal , Volume 100 , Issue 993 , March 1996 , pp. 87 - 90
Copyright
Copyright © Royal Aeronautical Society 1996 

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