{HEAD ~ A trailing surface} aft of {TAIL ~ the maximum radius} has a radius at all points therealong less than the maximum radius 
aft of
{ HEAD ~ A trailing surface } aft of { TAIL ~ the maximum radius } has a radius at all points therealong less than the maximum radius
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH