This relative rotational movement of crank handle 7 in relation to crank arms 6 is converted into backward and forward radial movement of crank arm 6, which causes the extremity of arm 6 that is connected to the rear section of {HEAD ~ blade} 2 to follow {TAIL ~ an elliptical orbital path} around turbine axle 4 
This relative rotational movement of crank handle 7 in relation to crank arms 6 is converted into backward and forward radial movement of crank arm 6 , which causes the extremity of arm 6 that is connected to the rear section of { HEAD ~ blade } 2 to follow { TAIL ~ an elliptical orbital path } around turbine axle 4
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH