{HEAD ~ Optional actuators} that may refine the surface shape include {TAIL ~ an “orientation” actuator} that drives rotation about the propulsors longitudinal axis, and a “geometry” actuator that controls each propulsors geometric configuration 
include
{ HEAD ~ Optional actuators } that may refine the surface shape include { TAIL ~ an “ orientation ” actuator } that drives rotation about the propulsors longitudinal axis , and a “ geometry ” actuator that controls each propulsors geometric configuration
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH