Ammunition and explosives – Having reaction motor – Having separation means
Patent
1988-07-11
1990-06-05
Jordan, Charles T.
Ammunition and explosives
Having reaction motor
Having separation means
102380, 102432, 102443, 102700, F42B 1510
Patent
active
049304216
ABSTRACT:
A traveling charge projectile utilizes a microprocessor and a plurality of sequentially fired igniting-priming-expelling charges to initiate respective charge segments containing propellant, such as granular propellant, of predetermined grain size, to produce a more nearly constant pressure against the projectile base. Traveling charge propellant segments attached to the projectile move with the projectile as it accelerates in the gun barrel. At appropriate intervals during barrel transit, a firing signal initiates a charge which propels the aft most propellant segment away from the projectile into the hot gases and flame behind the projectile to fully ignite the propellant charge and repressurize the expanding breech volume immediately aft of the accelerating projectile. This design maintains a higher average pressure on the base of the projectile during barrel transit, and results in a higher projectile muzzle velocity. Optionally, the microprocessor and associated EEPROM may be reprogrammed up to the moment of firing, by means of programming pads on the exterior of the projectile which communicate with the microprocessor. The traveling charge projectile is a close sliding fit in a smooth bore gun tube and is supported by a gas film between the charge and the gun tube wall. This enables traveling charge mass fractons of 90% to be obtained.
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Hennen Thomas W.
Jordan Charles T.
The Boeing Company
Wendtland Richard W.
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