Show Lindbergh's Lindberg Radial Motor GIs Is New In Design 22 X X g SC t g SS 2 9 Compact Light and Air Cooled 1 Dr y Eri I K KLEIN lonec bc-lonec Editor M X NI A Sen Service Ice THE pHE motor that t speeded Colonel Lindbergh and his airplane cross tho the American continent and ind the Atlantic In three q hops Is the latest development i de In aviation Simple as ns It Is Is It has caused causell a a. revolution resolution In airplane design Its remarkable success In making a trip of ot more than miles qt at a n. apace apace pace of ot miles tin nn hour and without 1 a a. hitch Is bound to make future a profound Impression on a aviation I The engine Is what Is called cail d an cooled air-cooled radial motor The The ono Lindbergh used was a a. tight Whirlwind made by the Wright Aeronautical corporation a IL plo veer in this type of ot engine v uc-v J sign r Two essential facts make this th ss motor different from others First It is air all cooled Second and more significant its Us nine cylinders are j-are re ranged In a circle around a dank dank- crankshaft throw shaft with only one ro r. r MORE Molts EFFICIENT T T I tf C This arrangement makes the motor more compact and nd more efficient than t It the tho calr VM ll lland PC engines formerly IY used d In airplanes and similar to those now run n ru f n automobiles l b The engine weighs pounds lOunds yet It can op 50 horsepower a II remar k achievement ement for or such a a. smal l o- o tor motor The crankshaft of ot this unlike those of the thet t Y type V-type pe or or 1 wp In- In Inline line engines we know has only omy one throw or cr Just I j t 3 oz d' d 1 I v s f fI 1 A Af f t tr r v t tx x frI r rI I I I a 3 i 1 41 tf J I e C r d' d IH f t l' i J f I I J r t. t 1 f fi j i fI i i Tills js N Is the thc thc- ln II motor which too Colonel r h to Parts Paris In Inset ct s shows details decal is of crankcase crank A the crank cronk- B fi mother mothr bearing C piston rod like 2 01 f of a single l cylinder mo mo- motor tor tor It It Is therefore short and am r mo-r reaches directly out to the double double- bladed propeller which Is whirled about by b the engine I Tho The single throw carries what is I called tailed a a. mother tearing caring which Is made so that It it ib can whirl about abut the crankshaft crankshaft once to each each sc se- se series e- e ries of or power strokes of the en- en entire tire tiro engine ine Attached to to the mother bearing are arc the piston rods which lead to tu the pistons In Inthe In Inthe inthe the nine cylinders Each lach rod Is placed on a bearing of or Its own within the mother bearing UM C DIlts DEnS JUT JilT IN Ji ORDER I As Ai II a a power stroke occurs In a II cylinder tho the piston pushes the mother bearing away way from It The Th next c clIn er takes up UI this power po power er erand and gives s the tho mother bearing b another push And BO so BOthe BOthe the power power explosions go on In order around the circle of ot cylinders cylinders ders with the mother bearing pushed around as fast as the cyl cyl- cylinders cylinders inders In lers explode The whirling motion of ot the bearing on Oil the turns the crankshaft and thus whirls the propeller at the front of ot the plane Each Bach cylinder Is exposed with 1 thin It so BO as to radiate Its heat as fast last as possible That makes It unnecessary to cool the engine with water Lack of or water for tor cooling reduces the weight needed In hi the power pant of ot an nn airplane Including not only that of ot the water itself but the radia radia- radiator radiator tor water Jackets and connections In addition the parts of the en engine en- en engine engine gine are concentrated about a II center In so so simple and compact an arrangement as further to reduce re reduce re- re duce weight and aid li 11 the lift lift- liftIng lifting Ing and carrying power of the en en- en gine |