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