 flight measur wall pressur fluctuat boundari-layer turbul flight measur wall pressur fluctuat boundari-layer turbul present flight test program fighter type jet aircraft fly pressur altitud 10 000 20 000 apparatu measur record output microphon hot-wire anemomet mount forward-fuselag wing airplan mean-veloc profil boundari layer total-pressur measur ratio root-mean-squar fluctuat wall pressur free-stream dynam pressur present function reynold number mach number longitudin compon turbul-veloc fluctuat measur turbul-intens profil present wing forward-fuselag gener agreement wind-tunnel measur report literatur exampl variat root squar wall-pressur fluctuat free-stream dynam pressur reynold number essenti constant forward fuselag-section boundari layer variat wing station unduli microphon diamet larg compar boundari-layer thick 