An exemplary embodiment depicts the invention in {TAIL ~ a rotary engine} having a rotor within {HEAD ~ a combustion chamber} 
An exemplary embodiment depicts the invention in { TAIL ~ a rotary engine } having a rotor within { HEAD ~ a combustion chamber }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD