Liquid propellant modular gun incorporating hydraulic pressuriza

Ordnance – Pneumatic

Patent

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Details

89 11, F41F 104

Patent

active

041619048

ABSTRACT:
A liquid propellant modular gun has a main cam which is driven at a multiple of the gun firing rate and which has internal cam surfaces operatively associated with the bolt while the bolt is driven forward to load and fire and backward to accept another projectile.
The gun incorporates a control cam driven at the gun firing rate and effective to unlock the bolt after firing of a projectile so that the bolt can be returned to its rearward position under the control of the main cam.
The main cam acts to time all the remaining mechanisms of the gun to the bolt motion.
The accelerating force for the bolt is provided by hydraulic pressure applied directly to the bolt area.
Energy stored in the bolt from the force of the accelerating hydraulic pressure is converted into rotary energy and is stored in the main cam and other rotating devices geared to the main cam.
The stored rotary energy in the main cam is used in combination with residual gas pressure remaining in the gun barrel for a part of the bolt return stroke to accelerate the bolt rearward.
Energy losses, including those caused by hydraulic pressure drop, friction and windage, are made up by a pumping system receiving its energy from the gas pressure added to the gun as a part of the firing of each projectile.

REFERENCES:
patent: 3800657 (1974-04-01), Broxholm et al.
patent: 4062266 (1977-12-01), Elmore et al.

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