Show FLYING AT GREAT HEIGHTS NOT EASY tells of winds cold and thin air washington the worlds foremost attitude altitude flyer alyer apollo at the navy hoedl no hope for or practicably bably aviation operation nt lit great heights an AD altitude of 10 0 wa beet or two miles lie he believes hol levea will anark the limit of ordinary air transport operation atlon in the alghi of present uny knowl edge of conditions in the bitter cold upper air levels lieutenant contends there Is no reul real basis for predictions ehni passenger tines lines some day will operate regularly at cuir altitudes above the level of the highest clouds and storms we must remember loucel said that there ure almost unvarying tr t do winds in tha upper nit flit lu in this country atlese winds blow with unfailing regularity froni from the southwest to tile the northeast and nt grent on ai altitudes this wind velocity except for planes flying from the lie southwest to the northeast there would be no benefit derived from climbing up into these grent great trude trade winds it would obviously be to 10 ones advance to climb nilles miles above the earth and then try to buck a WO mlle an hour head wind when favorable winds might be foun foum cl closer n ser to the earths burnace Bur face then too we must take into consideration tin fact net that the air to Is aure a and nd very cold always tit at high altitudes it would be necessary to heat airplane cabins and to provide oxygen for passengers and such a prove procedure dure would be expensive and would entail the carrying of henvy heavy equipment at altitudes above feet lieutenant pointed out the temper arturr fairly constant throughout the year und and above feet this temperature ra town down to 70 76 degrees decrees below zero regardless ot of the reubon deuson on the earths surface eight miles below |