Arrangement for reducing the base drag in projectiles

Details Arrangement for reducing the base drag in projectiles Arrangement for reducing the base drag in projectiles

1983-12-02

1985-11-26

Jordan, Charles T.

Ammunition and explosives

Shells

With range increasing means

102374, F42B 1300

Patent

active

045548722

ABSTRACT:
An arrangement for reducing the base drag in projectiles constructed pursuant to the high-low pressure system including a gas-generating charge, a chamber with a pressure-reducing component, and a discharge aperture provided in the base wall. In the arrangement for the reduction of the base drag in projectiles, the charge is annularly shaped, the pressure-reducing component is formed as a tube axially extending through the charge and possesses a multiplicity of nozzles. Through the provision of the large number or multiplicity of nozzles, the tube, which separates the high-pressure space from the low-pressure space, a relatively gentle gas jet exits from the bottom of the projectile. For this purpose, of significance is the swirling of the individual gas jets in the low-pressure space in accordance with the principle of the countercurrent process. The vacuum in the region of the projectile base is reduced to a minimum due to the gentle jet.

REFERENCES:
patent: 3988990 (1976-11-01), MacDonald, Jr. et al.
patent: 4104969 (1978-08-01), Moll
patent: 4213393 (1980-07-01), Gunners et al.

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