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MAKING USE OF THE ATMOSPHERE
THE MEDIUM IN WHICH FLIGHT IS ACHIEVED
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aerial navigation aero aerodromes aeroplane ailerons air lines air mail air routes air-cooled aircraft constructing airscrew airship altimeter amphibion angle Autogyro balloon barrel roll biplane bird flight bombers Chapter circle climb cloud commercial air transport companies compass control stick craft crankshaft direction distance drag duralumin earth's surface elevator enable engine Europe fall feet flies flight floatplane floats flown flying flying-boat force forward gliding gnomonic projection ground head resistance helicopter high speed HOUR OF AVIATION hull land landplane latitude lift loads loop machine magnetic poles manoeuvre maps maximum ment metal miles military monoplane motor nations nautical mile naval normal nose operation ornithopter pilot plane position produced rain rhumb line Richard Byrd rotating rudder seaplane ships slow roll south magnetic pole spin straight tail tion to-day turn upward vertical water-cooled weight wheels wind wing wireless