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