{TAIL ~ The simulator} is provided with {HEAD ~ a drop tube} or tower in which the projectile is positioned 
{ TAIL ~ The simulator } is provided with { HEAD ~ a drop tube } or tower in which the projectile is positioned
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH