The public got its first glimpse last week of Pratt & Whitney's J57 jet engine equipped with an afterburner, the engine that pushed the F-100 Super Sabre (TIME, Oct. 26) to an official supersonic speed record (755 m.p.h.) for military planes. The husky 20-ft. package of power is also being installed in Douglas' bat-winged fighter, the F4D Skyray, Convair's delta-winged F-102, Boeing's B-52 bomber, to give them an extra kick.
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