Gun projectile arranged with a base drag reducing system

Details Gun projectile arranged with a base drag reducing system Gun projectile arranged with a base drag reducing system

1977-07-15

1980-07-22

Bentley, Stephen C.

Ammunition and explosives

Igniting devices and systems

102 497, 102100, 1491086, F42B 1320

Patent

active

042133939

ABSTRACT:
A gun-launched projectile with a chamber for generation of combustion gases from a propellant grain is disclosed. The chamber is arranged with at least one gas outlet in its base plane, said propellant grain having a burning area, mass and static burning rate so related with the area of the gas outlet/outlets, that a low mass flow of gaseous combustion product is operable to continue from the time of muzzle exit for a considerable portion of projectile flight and to provide a substantial decrease in base drag with a concomitant increase in projectile range. The pressure in the combustion chamber during flight only slightly exceeds the base pressure in an amount of 0.01 to 0.5 bar.

REFERENCES:
patent: 3018203 (1962-01-01), Guth
patent: 3224191 (1965-12-01), Bratton
patent: 3494285 (1970-02-01), Doris, Jr. et al.
patent: 3628457 (1971-12-01), Magnusson et al.
patent: 3698321 (1972-10-01), Wall
patent: 3754507 (1973-08-01), Dillinger et al.
patent: 3886009 (1975-05-01), Puchalski
patent: 3988990 (1976-11-01), MacDonald, Jr.
patent: 4003313 (1977-01-01), Puchalski
patent: 4091732 (1978-05-01), Schadow

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