DETERMINATION OF TRUNNION REACTIONS, 37mm. AUTOMATIC GUN M4, NO. 69. FIRING M59 A.P. PROJECTILE (W/O CAP) AT NORMAL TEMPERATURE.
BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD
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The trunnion reactions occurring during the firing cycle of the 37 mm. Automatic Gun M4 were determined by means of piezo-electric gages and the cathode ray oscillograph. In addition, the displacements of the barrel and of the lock frame vs. time were determined. Author