Show ON PRINCIPLE OF BOOMERANG airplane along sma line th famous weapon of australian buhan Buh mn although an anomaly to go to the primitive savages of australia OP points on an airplane that was just ahat was done in the development of flying in the air by humans the fundamental principle of the plane Is both old and simple having been als cohered by the bushmen of the antipodes and embodied by them in the boomerang which by meeting in its flight the air at a slight angle got a lift the trajectory of the boomerang may be in part horizontal or may een rise as a result of this lift any SUP face that Is more or less flat that travels at a slight angle through tends to lift it the section has a light camber or convex curve the lift Is increased better results are obtained it a body of appreciable thickness Is used instead of a thin sheet these points the australian discovered investigation will show little difference between the w ing section of the modem airplane and a cross section of a boomerang made by the bushmen whittled by a bew york boy after he had visited the circus and had witnessed the stunts of the boomerang throwers th rowers the resemblance of the boomerangs cross section Is closer to a propeller section of an airplane as a boomerang Is a sort of cross between an airplane wing and a propeller |