Testing device for ordnance

Measuring and testing – Ordnance and projectile

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G01L 514

Patent

active

047619988

ABSTRACT:
An ordnance piece is subjected to testing which approximates the time history of forces on the piece during actual firing thereof. A mass of predetermined weight is impelled to a predetermined velocity so that it attains a kinetic energy capable, upon deceleration to standstill, of imposing the desired time history of forces upon the brake and return mechanism of the ordnance piece. The force is applied to the muzzle of the barrel of the piece or to a dummy barrel and the energy transfer is effected in two stages of deceleration, the first stage being a cushioned stage and the second stage being a full impact or uncushioned stage. This results in a time history of forces acting upon the barrel in which the force increases from zero to a peak value and then decreases from this peak value to zero, thus approximating the actual time history of forces during actual firing of the piece. In order to assure that the desired kinetic energy is imparted to the mass, an impelling gas pressure is built up against a plunger and it is then held in this position against the mass and released by destruction of an attachment without significant variation of the gas pressure. Thus, control of the mass weight and the gas pressure allows a precise kinetic energy to be imparted to the mass.

REFERENCES:
patent: 2518466 (1950-08-01), Hanson
patent: 3285052 (1966-11-01), Lothrop, Jr.
patent: 3437291 (1969-04-01), Bochman, Jr.
patent: 3626451 (1971-12-01), Bourgeot
patent: 3693432 (1972-09-01), Stewart et al.
patent: 4069702 (1978-01-01), Hayner
patent: 4505153 (1985-03-01), Lilley et al.
patent: 4554838 (1985-11-01), Paus

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