Solid pyrotechnic compositions for projectile base-bleed systems
First Claim
Patent Images
1. A method for reducing the base-drag of a non-self-propelled projectile comprising the steps of:
- providing a non-self-propelled projectile having a cavity wherein and fluid communication between said cavity and the near wake zone at the base of said projectile;
loading said cavity with a pyrotechnic composition that provides upon burning of said composition a low mass flow of gaseous combustion products in the near wake zone of said projectile, said low mass flow of combustion products being sufficient to increase the base pressure in the near wake zone and decrease the base-drag of said projectile, wherein said pyrotechnic composition comprises;
(A) oxygenated hydrocarbon component selected from the group consisting essentially of dehydroacetic acid, sorbital, ascorbic acid, adipic acid, lactose, glucose, and mixtures of any of them, said oxygenated hydrocarbon component having a melting point above 90°
C.; and
(B) oxidizing agent component; and
reacting said oxygenated hydrocarbon component with said oxidizing agent component during at least a portion of flight of said projectile.
3 Assignments
0 Petitions
Accused Products
Abstract
The invention is directed to a solid, pyrotechnic composition as a base-bleed composition for reducing the base-drag of non-self-propelled projectiles. The composition comprises a oxygenated hydrocarbon component and an oxidizing agent component.
27 Citations
10 Claims
-
1. A method for reducing the base-drag of a non-self-propelled projectile comprising the steps of:
-
providing a non-self-propelled projectile having a cavity wherein and fluid communication between said cavity and the near wake zone at the base of said projectile; loading said cavity with a pyrotechnic composition that provides upon burning of said composition a low mass flow of gaseous combustion products in the near wake zone of said projectile, said low mass flow of combustion products being sufficient to increase the base pressure in the near wake zone and decrease the base-drag of said projectile, wherein said pyrotechnic composition comprises; (A) oxygenated hydrocarbon component selected from the group consisting essentially of dehydroacetic acid, sorbital, ascorbic acid, adipic acid, lactose, glucose, and mixtures of any of them, said oxygenated hydrocarbon component having a melting point above 90°
C.; and(B) oxidizing agent component; and reacting said oxygenated hydrocarbon component with said oxidizing agent component during at least a portion of flight of said projectile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification