Publisher's Synopsis
Excerpt from Theory and Design of Recoil Systems and Gun Carriages: Chapter VIII, January 1922
During recoil the constant orifice about the buffer rod at the diaphragm of the recuperator cylinder produces a throttling of the oil and a consequent drop of pressure due to the constant orifice.
During counter recoil the oil passes through a constant orifice produced by constant throttling grooves in the buffer chamber. Toward the end of recoil the depth of these grooves vary, causing a varying orifice. The throttling is so designed as to cause a sufficient drop of pressure from the air, to produce a pressure against the hydraulic piston just sufficient to balance the total friction and thus nearly maintain uniform motion through a considerable part of counter recoil.
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