Controlled spin projectile
DCFirst Claim
1. A projectile comprising:
- a body including a bearing surface and an ogive continuous to and extending forward from the bearing surface;
a plurality of grooves and a plurality of lands formed on the bearing surface of the projectile in an alternating pattern for imparting a predetermined spin damping moment to the projectile in flight; and
a ratio of a total surface the projectile to a total surface area of the physical feature in the range of to 3.00;
1 to 4.00;
1.
5 Assignments
Litigations
0 Petitions
Accused Products
Abstract
A projectile and a method of launching a projectile from a barrel. The projectile of the present invention may be matched to a pre-selected barrel rifling to produce a controlled spin rate. Controlled spin rate is characterized by substantially balanced forward and axial deceleration. Substantially balanced forward and axial deceleration is characterized by an axial speed that decreases in relationship to the decrease in forward speed. Substantially balanced forward and axial deceleration produces a trajectory that is characterized by a gyroscopic stability factor that remains highly stable over a given distance of a trajectory. Gyroscopic stability is controlled during the projectile'"'"'s flight by controlling the spin damping moment as a design element. Control of the spin damping moment may be achieved by incorporating physical features in the projectile'"'"'s design and manufacture and/or may result from the incorporation of physical features imparted upon the projectile during launch.
-
Citations
19 Claims
-
1. A projectile comprising:
-
a body including a bearing surface and an ogive continuous to and extending forward from the bearing surface;
a plurality of grooves and a plurality of lands formed on the bearing surface of the projectile in an alternating pattern for imparting a predetermined spin damping moment to the projectile in flight; and
a ratio of a total surface the projectile to a total surface area of the physical feature in the range of to 3.00;
1 to 4.00;
1.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method for launching a projectile along a trajectory characterized by a controlled spin rate and a substantially balanced forward and axial deceleration including the steps of:
-
forming the projectile having a body including a bearing surface and an ogive continuous to and extending forward from the bearing surface and an aerodynamic drag factor upon launching and during flight in the range of 0.100 to 0.250;
forming the projectile having ratio of a spin rate of the projectile to a forward velocity of the projectile upon launching and during flight in the range of 1.25;
1 to 1.40;
1; and
imparting a physical feature to a bearing surface of the projectile, the physical feature having a depth substantially equal to 1% the caliber of the projectile and a ratio of a total surface area of projectile to the total surface of the physical feature in the range of to 3.00;
1 to 4.00;
1 for imparting an axial surface friction upon launching and during flight required to produce a trajectory characterized by a continuously decreasing rate of axial deceleration.
-
-
15. A projectile comprising:
-
a body including a bearing surface and an ogive continuous to and extending forward from the bearing surface;
the projectile including a pre-selected physical feature having a depth substantially equal to 1% the caliber of the projectile;
the projectile including a relatively low drag coefficient in the range of 0.100 to 0.250; and
the projectile including a ratio of a total surface area of projectile to a total surface of the physical feature in the range of to 3.00;
1 to 4.00;
1.- View Dependent Claims (16, 17, 18, 19)
-
Specification