When {TAIL ~ blade} 2 is in the upwind or in {HEAD ~ the downwind sectors} of the cylindrical path it creates mainly drag and drive component forces 
When { TAIL ~ blade } 2 is in the upwind or in { HEAD ~ the downwind sectors } of the cylindrical path it creates mainly drag and drive component forces
OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH