The projectile is positioned in a drop tube and impacted with {HEAD ~ a drop vehicle} to simulate {TAIL ~ the forces} created during firing of the projectile 
The projectile is positioned in a drop tube and impacted with { HEAD ~ a drop vehicle } to simulate { TAIL ~ the forces } created during firing of the projectile
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH