MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 40
ally on landing in calm air. If circumstancesrequire you must follow one on landing, stay at least60 seconds behind him. Keep your glide path wellabove that of the heavy aircraft, and land down therunway well ahead of the point where he toucheddown. DO NOT cross behind other aircraft,… … UP GUST FOUOWEO BTVIOLENT DOWN OUST VIOLENT ROa TOLEFT EXPERIENCED Fig. X. Hazards of Wing Tip Vortex. Mach Number The MACH NUMBER (pronounced Mock) is theratio of the speed of a body to the speed of sound in theair surrounding the body. (The SPEED OF SOUND is1120 feet per sec. in air at a…
Airplanes
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