National Geographic : 1944 May
Off Comes the Lid of Aircooled Engine Power Another outstanding engineering development has come out of Fairchild's Ranger laboratories - a new and unique type of aircraft engine cylin der barrel. With it, an aircooled engine can pro duce appreciably greater horsepower. What does this mean in terms of air strength for the United Nations? It means that our planes can now have one or a combination of several new advantages: they can carry greater bomb loads; or heavier armor; or more am munition; they can lift more gasoline and so increase their range; their maneuverability can he stepped up. The full story of how it works is technical, in volved, and shrouded with secrecy. But briefly and in non-technical language, this much can be told: Those "fins" you see surrounding the cylinder barrel in the picture are made of aluminum, a metal with pronounced ability to draw off engine heat. The core of the cylinder is steel. By all previous methods of manufacture an aluminum alloy "fin" was attached to the core as a separate part. Thus its cooling efficiency was only partly utilized. Now, with Fairchild's "Al-Fin" process, it is possible to chemically bond the two metals with the result that engine heat is drawn off much faster than by the conventional aluminum or steel "fin." The announcement can now be made that all 12-cylinder Ranger engines produced during the past year have incorporated this revolutionary development. As another example of the "touch of tomor row," this latest product of Fairchild engineering takes its place among the notable aviation achievements of the day. BUY U. S. WAR BONDS AND STAMPS Ai FAIRCHILD ENGINE AND AIRPLANE CORPORATION 30 ROCKEFELLER PLAZA, NEW YORK Ranger Aircraft Engines Division, Farmingdole, L.I . * Fairchild Aircraft Division, Hagerstown, Md.... Burlington, N. C. * Duramold Division, New York, N.Y.