Compressed air is then delivered to combustor 16 and {HEAD ~ airflow} from {TAIL ~ combustor} 16 drives turbines 18 and 20 
Compressed air is then delivered to combustor 16 and { HEAD ~ airflow } from { TAIL ~ combustor } 16 drives turbines 18 and 20
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH