Show ON PRINCIPLE OF BOOMER airplane constructed along lines alln as 1 the carnous Wes weapon australian bushmen although Altho uh an ano anomaly maly to go cotoc to primitive savages of australia o 0 points on an airplane that we w what was nas done ID lit the dee of flying in the air by human humans L T fundamental principle of the plinia atao both old and simple ning lining li If Illg beta beeam 6 covered by the behmen buh men of the 14 odea and embodied hy by them a u boomerang which by meeting Inglat ao 10 flight the be air at a blight slight anglon anil a 1 I lift I 1 ft the trajectory of the boomers o 0 may be tn in part horizontal or may rife rise as a result of thia this lift any it face that Is more or less hat flat that tnt els at fit a slight angle through the th tends to lift it if the section hi hu slight camber or convex curte ft 6 lift Is increased better result results ir in obtained if a body of thickness ie Is used iff d instead of i a sheet these points the australian j covered investigation will show little ence between the wing section of of 6 modern airplane and anti a cross bedol of a boomerang made by the bush or whittle hitt lell by a new york boy boyi ae he had visited the circus end and had haftl it finessed the stunts of the boomed thron throwers ers the resemblance of the boo boonie mj cross section Is closer to a proad section of an airplane as a blomen boomen Is a sort of cross between aa an wing ing slid a propeller |