US 6,981,672 B2 | ||
Fixed canard 2-D guidance of artillery projectiles | ||
John A. Clancy, Eden Prairie, Minn. (US); Thomas D. Bybee, Ramsey, Minn. (US); and William A. Friedrich, Minnetonka, Minn. (US) | ||
Assigned to Aleiant Techsystems Inc., Edina, Minn. (US) | ||
Filed on Sep. 17, 2003, as Appl. No. 10/664,223. | ||
Prior Publication US 2005/0056723 A1, Mar. 17, 2005 | ||
Int. Cl. F42B 10/02 (2006.01); F41G 7/00 (2006.01); F41G 9/00 (2006.01) |
U.S. Cl. 244—3.24 | 13 Claims |
1. A projectile guidance system comprising:
a body portion;
a nose portion connected to the body portion by a spin control coupling;
said spin control coupling being constructed and arranged so that when the body portion is spinning in a first rotational
direction, the nose portion will spin in a second rotational direction;
the nose portion including first and second aerodynamic surfaces fixedly attached to the nose portion and configured and arranged
to cause the nose portion to spin in the second rotational direction during projectile flight;
the nose portion including third and fourth aerodynamic surfaces fixedly attached to the nose portion and being configured
and arranged such that when nose portion is spinning the third and fourth aerodynamic surfaces have no net effect on projectile
flight, but when the nose portion is despun using the spin control coupling, the third and fourth aerodynamic surfaces induce
both a moment and a lateral force to the nose, causing the projectile flight path to change.
|