An apparatus 4, the fuel tube having a fixed location so as to vary in {HEAD ~ proximity} to {TAIL ~ the shock wave} upon changes in nozzle flow area and manifold vacuum 
to
An apparatus 4 , the fuel tube having a fixed location so as to vary in { HEAD ~ proximity } to { TAIL ~ the shock wave } upon changes in nozzle flow area and manifold vacuum
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH