Projectile

Abstract

The present disclosure discloses a projectile that interacts with a barrel to allow the projectile and the projectile's fluid to spin at approximately the same rate. In some embodiments the barrel is a rifled barrel and the projectile includes at least one fin. The projectile may also have its center of gravity rearward of its midpoint and/or its center of pressure. The projectile may also have its center of pressure forward of its midpoint and/or forward of its center of gravity. The center of gravity and center of pressure may also be at the same location as the midpoint, forward of the midpoint, or rearward of the midpoint.

I claim: 
     
         1 . A marker and projectile assembly including
 a projectile, and   a marker having
 a gun stock, 
 a gun barrel coupled to the gun stock, and 
 a pneumatic system for propelling the projectile forward through the gun barrel, and the projectile having 
 a forward portion including a front end of the projectile, 
 a rearward portion positioned rearward of the forward portion and including a rear end of the projectile, 
 a longitudinal midpoint positioned equidistant between the front and rear ends of the projectile, and 
 a center of gravity of the projectile, the center of gravity being positioned rearward of the longitudinal midpoint. 
   
     
     
         2 . The marker and projectile assembly of  claim 1 , wherein the forward portion of the projectile is substantially hemispherical. 
     
     
         3 . The marker and projectile assembly of  claim 1 , wherein the front end of the projectile is substantially flat. 
     
     
         4 . The marker and projectile assembly of  claim 1 , wherein the projectile further includes a fluid positioned in the rearward portion of the projectile. 
     
     
         5 . The marker and projectile assembly of  claim 1 , wherein an exterior profile of the forward portion of the projectile is substantially different than the exterior profile of the rearward portion of the projectile. 
     
     
         6 . A projectile comprising:
 a forward portion including a front end of the projectile,   a rearward portion positioned rearward of the forward portion and including a rear end of the projectile,   a longitudinal midpoint positioned equidistant between the front and rear ends of the projectile,   a fluid positioned in an interior region of the projectile, and   a center of gravity of the projectile, the center of gravity being positioned rearward of the longitudinal midpoint of the projectile.   
     
     
         7 . The projectile of claim  7 , wherein the fluid is paint. 
     
     
         8 . The projectile of  claim 7 , wherein the fluid is a liquid. 
     
     
         9 . The projectile of  claim 7 , wherein the fluid is a powder. 
     
     
         10 . The projectile of  claim 7 , wherein the fluid is positioned in the rearward portion of the projectile. 
     
     
         11 . The projectile of claim  11 , wherein a substantial majority of the fluid is positioned in the rearward portion of the projectile and a substantial minority of the fluid is positioned in the forward portion of the projectile. 
     
     
         12 . The projectile of  claim 7 , wherein the rearward portion of the projectile further includes at least one fin protruding into the fluid. 
     
     
         13 . The marker and projectile assembly of  claim 7 , wherein the forward portion of the projectile has a volume and the volume is substantially filled with foam. 
     
     
         14 . A projectile comprising:
 a forward portion including a front end of the projectile,   a rearward portion positioned rearward of the forward portion and including a rear end of the projectile,   a longitudinal midpoint positioned equidistant between the front and rear ends of the projectile, a fluid positioned in an interior region of the projectile, and   a center of gravity of the projectile, the center of gravity being positioned rearward of a center of pressure of the projectile.   
     
     
         15 . The projectile of claim  17 , further comprising a longitudinal midpoint positioned equidistant between the front and rear ends of the projectile, wherein the center of gravity of the projectile is positioned rearward of the longitudinal midpoint. 
     
     
         16 . The projectile of claim  18 , wherein the center of pressure is positioned forward of the longitudinal midpoint. 
     
     
         17 . The projectile of claim  17 , wherein the fluid is paint. 
     
     
         18 . The projectile of  claim 17 , wherein the forward portion has a volume and a majority of the volume is devoid of fluid. 
     
     
         19 . The projectile of  claim 17 , wherein an exterior profile of the forward portion of the projectile is substantially different than the exterior profile of the forward portion the projectile. 
     
     
         20 . The projectile of  claim 17 , wherein the center of gravity is positioned approximately 20-40% of a cord length of the projectile from behind the longitudinal midpoint.