Show AVIATION NEEDS OIL FUEL MOTOR Experts l y on Non Xou- N Explosive Y i I Fluid d for Diesel Type LANGLEY FIELD Va July ti tiBy By The Associated From Press Fr From m the study of or a a. tiny spray of oil re research re- re research search engineers hope to U wipe out i ithe the possibility of fire that looms each time an airplane leaves the ground An epoch In aviation a awaits the development of an oil 01 burning en engine en- en engine gine to replace the gasoline type many airmen believe Ue e and the Na Na- National National Advisory Committee for Aero Aero- Aeronautics i established by congress Is at work on the problem EXPLOSION F DANGER A great majority of airplane fa fatalities fa- fa result from explosions says Edward R R. Sharpe chief clerk In the committees committee's Langley Memorial labor labor- laboratories A plane crashes there Is 15 Isen isan en eon explosion or gasoline comes In contact with hot metal me 1 and Is fired The planes plane's occupants arc are burned to death What we must have Is an air air- airplane airplane airplane plane engine consuming a non in noninflammable noninflammable noninflammable flammable fluid preferably oil be be- be cause oil of low grade Is 13 not expensive expensive sive But the development of such an engine Is not to U come overnight The principle of the th Diesel engine an oil burner is being studied and an Il Illustration 11 1 of the problem Involved Is Ishad Ishad ishad had In a comparison with the prin prIn- principle prInciple principle ciple of or the gasoline engine now used Instead of producing power through as In the gaso gaso- gasoline gasoline gasoline line engine the Diesel engine gener gener- generates generates generates ates power by compressing A n low grade non-inflammable non oil Into spray which goes direct Into the cylinders MUST REDUCE SIZE i iA A Diesel engine generating 1000 horsepower weighs approximately 2 2200 2200 2200 pounds and Is so large that two t torm fill rm the engine room of a a. submarine On the other hand a gasoline en engine en- en engIne engine gine of great horsepower Is so 10 small that a several s of them may a be used J bt eUS In a plane Reduction lo of i the oil burner In size rIfe with preservation of power then Is u one of the problems problem before engineers An Important problem Is the form and density of or the oil spray In Into In- In Into into to the cylinders Two contrivances have been b en set up which h h- h attract attract- attracted ed the admiration of or eminent engi enl engineers One known as the universal tess engine operates on the Diesel prin prin- principle princIple principle ciple Pond and may be adjusted so 0 that the performances It records record arc are those of engines of various sizes Izes Differ Differ- Differences Differences Differences In the stroke gear ratio valve timing water and air temperatures and volume of air are studied ml- ml PHOTOGRAPH PH SPRAY The spray pray J ay of oil oil which Is formed and discharged so fast that to the eye It appears as one continuous spurt is photographed by a motion picture camera at the rate of exposures per second By studying these pictures engineers are able to determine the shape and density of or th spray s ray rayA A millionaire with to U spend In an entertaining way wilt will one of these days to U put an anoil anoil anoil oil burning engine In to an nn airplane Sharpe said Hell come to us for what we know and after alter a time avia la aviation lion tion will have its oil ou burning engine But there are arc enough problems to keep us busy for quite a 1 awhile while yet |