The other extremity of crank arm 6 is connected to an articulated joint located in {HEAD ~ the rear section} of {TAIL ~ blade} 2 
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The other extremity of crank arm 6 is connected to an articulated joint located in { HEAD ~ the rear section } of { TAIL ~ blade } 2
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH