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Bell’s Big Yh-12b Put Through Paces
These are the first views of the big Bell YH-12B 10-place-plus-pilot helicopter, 13 of which were built for the USAF. The YH-12B is powered by a P&W R-1340 Wasp of 600 hp. which gives the craft a top speed of over 120 mph. and a cruising speed of 85.