{TAIL ~ an arrangement} for determining the combustion duration from {HEAD ~ an energy conversion} which is calculated using a polytropic equation of state 
{ TAIL ~ an arrangement } for determining the combustion duration from { HEAD ~ an energy conversion } which is calculated using a polytropic equation of state
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH