Show ON PRINCIPLE OF BOOMERANG airplane constructed along same sam lines as the famous weapon of australian Allan bushmen although tin nn anomaly to go to tha primitive savages of australia australla Austi alla for points on an airplane that wits B just w alint flat was ns lone done in the development of nf lying flying in tile hir by humans human tile the fundamental principle of the plane Is isi both old lind and simple having been di discovered by the bushmen or of the antipodes and embodied by them in tile the boomerang boome rong which by meeting in itai flight the air at a slight angle gota lift the trajectory of the boomerang may be in part horizontal or may even rise as a result of this lift any surface that Is more or less flat that trav els at it a slight blight angle through tile air tends to lift if the section has ri a slight camber or convex curve the lift la Is increased better results are obtained it if a boily body of appreciable thickness Is used instead of a thin sheet these points the alie australian discovered investigation will show little difference between the wing section of Z modern nir airplane plane and a cross crofts section of a boomerang made by tift tl bushmen or whItt whittled letl by a new york boy after he had visited the lie circus and had witnessed the stunts stunt of the boomerang rowers 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 |