The mechanism rebounds with the natural cosine function of the spring mass of the resilient rebound device to minimize {HEAD ~ energy losses} during {TAIL ~ reversal} 
The mechanism rebounds with the natural cosine function of the spring mass of the resilient rebound device to minimize { HEAD ~ energy losses } during { TAIL ~ reversal }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL