Accession Number : AD0703209

Title :   KINEMATIC ANALYSIS OF THE 20MM AUTOMATIC GUN OF THE T74 TYPE (GERMAN M.G. 213).

Descriptive Note : Technical rept.

Corporate Author : SPRINGFIELD ARMORY MASS

Report Date : 15 MAR 1950

Pagination or Media Count : 235

Abstract : With the assumption of an elliptic cam, the cyclic function of a drum gun mechanism was analyzed in a general way. The most characteristic figures are the rate of fire, the maximum cam force and the maximum velocities of slide and drum. In addition to the weights of the slide and the drum and the dimensions of the cam, the influence of the driving spring, the friction and the mounting were taken into consideration by five (5) calculation steps. Finally a system of formulae was obtained which describes the relationships. It allows for the precalculation of the cycle as well as for the evaluation of testing records with regard to a drum gun of any caliber. (Author)

Descriptors :   (*MACHINE GUNS, KINEMATICS), AMMUNITION FEED MECHANISMS, RECOIL MECHANISMS, CAMS, BREECH MECHANISMS, CYCLIC RATE, FRICTION, MATHEMATICAL ANALYSIS

Subject Categories : Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE