Extendable ram cannon

Details Extendable ram cannon Extendable ram cannon

1986-09-22

1988-02-02

Bentley, Stephen C.

Ordnance

Pneumatic

89 8, 89 1405, 89 16, 602701, F41F 1700

Patent

active

047222611

ABSTRACT:
A ram cannon (1) has an extendable barrel (2) slidably disposed over a starter cannon barrel (7). Such an extendable barrel is fully retractable during transport of the cannon and extendable at the time of firing. The barrel is also partially extendable, thereby providing a means to vary the muzzle velocity of a projectile (6) without varying the ratio of the fuel to the oxidizer in the propellant mixture. Utilizing an extendable barrel allows adapting a ram cannon to mobile artillery weapons, providing ease in transport, setup and firing, with a precise and rapid range adjustment capability.

REFERENCES:
patent: 3126789 (1964-03-01), Meyer
patent: 3229583 (1966-01-01), Long et al.
patent: 3253511 (1966-05-01), Zwicky
patent: 3284942 (1966-11-01), Moseley
patent: 3359856 (1967-12-01), Grosschopf et al.
patent: 3465638 (1969-09-01), Canning
patent: 4384507 (1983-05-01), Finn
patent: 4428293 (1984-01-01), Botwin et al.
P. J. Wilbur et al., "The Electrothermal Ramjet", J. Spacecraft, vol. 20, No. 6, Nov.-Dec. 1983, pp. 603-610.
A. Hertzberg et al., "The RAM Accelerator . . . ", 37th Meeting of the Aeroballistic Range Assoc., Quebec, Canada, Sep. 9-12, 1986.

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