Evolutionary development of Aircooled Motors 0-425-1 and 0-425-2 Franklin 425-cu in. engines; 0-425-13 produces takeoff power rating of 300 bhp from sea level to 10,000 ft altitude; turbosupercharger will supply 40 in. of mercury absolute pressure at carburetor inlet up to 16,000 ft altitude.
New turbosupercharged helicopter powerplant
Am Helicopter
American Helicopter ; 35 , n 12
1954
2 pages
Article (Journal)
English
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