Show LEARNING THE al AIRS SECRETS CRET 1 I iea of wind Pre A 0 that mean a great deal to ole flying man the tae public sm seems never to ure ot hearing ot of the eipl exploits of 1 avla tors torb but has baa little thought or 11 apple or x elation of tho the men aan who are making maki liga a scientific study ot of some of 0 the phenomena of the air and tr trying ng to flud out some of its secrets such an investigator li Is at eiff eiffel who has installed near the town 0 of f the same name nama in parla paris an aerodynamic ae laboratory and la is studying by perl ment the pres pressure suro of the wind upon planes of different shapes an and d in clond at different angles to the ofiel air hardly spectacular such stich experiment rl but each baiot bit of knowledge so gain 0 1 helps in the final conquest of the al one astonishing fact and one t fht no one attempts atter apts to expiate hs ha ai at been announced it Is that upon a square plane plana such as aa many aeroplanes aero planes have the wind pressure la Is one and a halt half times az as great at an angle of 2 1 sa 3 3 degrees as aa when the same plane la Is turned square against the wind dut but when planes of different shapes bapes are used jhc ahr results are very different and many of the for formulae now accepted are upset it ts Is by such painstaking methods that progress resti sn in aviation must henceforth bo made |