Word: radially
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Next year's air-cooled engine (for 1943's planes) seems likely to be the 3,000 horsepower radial. Among liquid-cooled makers, Lycoming and Continental are working hard on engines that some airmen hope will be good for pursuit. Henry Ford is plugging at two different high-powered, liquid-cooled engines (besides air-cooled Pratt & Whitneys, which he is making on contract). Allison has been long at work on a 24-cylinder, liquid-cooled engine that should develop around 2,400 h.p. The experimental Allison's cylinders are grouped in a W over two-geared crankshafts...
...Vultee Vengeance. Its military load, range, speed were secrets. Unofficial claims indicated that it can carry upwards of a ton of bombs, that it has a range of 1,000 miles or more, a diving speed of better than 300 m.p.h. Its power plant is an air-cooled, radial Wright engine (the 1,700-h.p. Cyclone...
...cooled (radial) motors have a current edge in the air-cooled - liquid-cooled squabble largely because they have a longer engineering history. But the Germans have a compromise: an air-cooled, in-line engine which would combine the best features of both types...
Sergeant Pullen's tank looked just like the eight other light tanks in Company D: a squat, 27,000-lb monstrosity of one-inch armor, five guns, a single turret, a 250-h.p. radial engine, gasoline tankage for about 70 miles of combat operation at 10-35 m.p.h. It was painted a dirty brown. It was not beautiful in any sense. When Sergeant Pullen tried to put his feeling for his tank into words, he would say with passion that he would feel like beating in the face of anybody who tried to take his tank. He alone knew...
When P. & W. came out with its 1,850-h.p. radial engine, later stepped up to 2,000, the Vought-Sikorsky F4U became feasible, with the assistance of research-wise National Advisory Committee for Aeronautics, which helped slick the new plane up as no air-cooled job had ever been slicked before. An old flying adage is that "there is no substitute for soup," i.e., horsepower. In soup the new radials were ahead of the Allison by close to 2-to-1, even when the Allison was putting out its full power. Excess power means not only more speed...