An airflow propulsion device is coupled to {HEAD ~ the intake opening} to draw {TAIL ~ the flow} through the intake opening and through a flow passage having an approximately constant flow area 
to draw
An airflow propulsion device is coupled to { HEAD ~ the intake opening } to draw { TAIL ~ the flow } through the intake opening and through a flow passage having an approximately constant flow area
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH