Science: Bypass in the Middle

Recent pictures of new Russian bombers caused a flurry of speculation among engine experts. The Tupolev Bison, for instance, is about as big as the U.S. B-52. which has eight J57 jet engines, each rated at 10,000 Ibs. of static thrust (but capable of substantially more). But the Bison has only four engines, which led the experts to conclude that they must have at least 15,000 Ibs. of thrust.

Close study of the Bison's air intakes, which are 6 ft. in diameter, has convinced some experts that the new Russian engines are merely large,...

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