Wake stabilized supersonic combustion ram cannon

Ordnance – Accelerating

Patent

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102501, F41F 100, F42B 1126

Patent

active

047262796

ABSTRACT:
A supersonic combustion ram cannon (1) includes a conical projectile (8) with a flat base (9) which produces a subsonic wake (12) as it flies through a barrel (2). The projectile is configured to avoid a normal shock, relying instead on supersonic compression, combustion and gas expansion. The supersonic combustion of a fuel-oxidizer mixture around the tail of the subsonic wake, pressurizes the wake and drives the projectile forward. By utilizing wake stabilized supersonic combustion, the compression and combustion pressures can be matched to the limiting barrel working pressure, thereby providing for optimum thrust and maximum projectile acceleration.

REFERENCES:
patent: 3253511 (1966-05-01), Zwicky
patent: 4428293 (1984-01-01), Botwin et al.
Thomas H. Green, "Styles in Small Arms Projectiles an Analysis of the Development of Bullet Shapes--Old and New", Army Ordance, May-Jun. 1932, pp. 395-401.
P. J. Wilbur, "The Electrothermal Ramjet", J. Spacecraft, vol. 20, No. 6, Nov.-Dec. 1983, pp. 603-610.
Officers of the U.S. Navy, "Naval Ordance--A Text Book", The Lord Baltimore Press, 1921, pp. 82-83.
A. Hertzberg, "The Ram Accelerator: A New Chemical Method of Achieving Ultrahigh Velocities", 37th Meeting of Aeroballistic Range Assoc., Quebec, Canada 9/9-12/86.

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