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US 4,091,732 AGranted
Fuel injection
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorKlaus C. Schadow
Life of this patent
Estimating the term…
Abstract
A method and apparatus for improving combustion efficiency in external bung assisted projectiles by slowing te exit speed of fuel-rich exhaust gases to subsonic flow.
Claims8
A projectile, comprising:
- a body portion terminated in a bluff base and having an internal combustion chamber;
- a solid propellant grain within said combustion chamber and configured to produce products of partial combustion;
- a primary nozzle having a throat communicating with said combustion chamber, said throat being dimensioned to produce sonic flow of said products of partial combustion;
- and
- secondary nozzle means having at least one passage extending through said body portion and communicating with said primary nozzle throat for subsonically passing said products of partial combustion to the exterior of said body portion for further combustion of said products of partial combustion exterior to said body portion;
- whereby said further combustion creates a pressure on said bluff base.
3 more elements
A projectile comprising:
- a body portion terminated in a bluff base;
- a combustion chamber within said body portion;
- a grain of solid propellant within said combustion chamber;
- a primary nozzle communicating with said combustion chamber and dimensioned to promote combustion of said grain;
- secondary nozzle means extending through said body portion and communicating with said primary nozzle for passing the combustion products therethrough to the atmosphere, whereby further combustion exterior to said body portion provides a pressure increase on said bluff base.
2 more elements
Dependencies are inferred from the claim text.