A drop vehicle is positioned in {HEAD ~ the tube} or {TAIL ~ tower} above the projectile so as to impact on the projectile when released and subjected to gravitational force 
A drop vehicle is positioned in { HEAD ~ the tube } or { TAIL ~ tower } above the projectile so as to impact on the projectile when released and subjected to gravitational force
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH