 superson axial symmetr nozzl superson axial symmetr nozzl twenti-on exit mach number rang 1 008 8 238 ten superson axial symmetr nozzl shape plane sonic surfac comput eniac method characterist boundari shortest group ten sharp edg sonic plane smooth boundari report describ comput procedur present sampl twenti nozzl extens elabor tabl entir comput ballist laboratori nozzl contour accur interpol exit mach number 1 479 8 238 wide rang ratio nozzl length throat diamet 