Figure 4-3. Mechanism of "Bicycle Chain" Gun.
sccond to prepare the way for a detailed analysis of the factors to be considered in the design of rotary chamber mechanisms in particular. (All of this discussion will be concerned primarily with guns of the full automatic type which employ conventional cartridgc-tvpc ammunition. Power-driven machine guns and guns which employ other mptive forces produced by the explosion of the pro-pellant charge. The barrel of the gun is fixed to a supporting frame which is fashioned to permit the explosion chamber to be held behind the barrel so as to form a prolongation of the bore. Of course, in an actual gun, a suitable mechanism must be provided to move the explosion chambers successively
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