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Show UNUSUAL FACTS Some jet engines don't need high octane fuel, burning anything from kerosene and powdered coal to hair tonic. . . . The German V-2 bomb, which weighed 12V4 tons, reached a velocity of 3,500 miles per hour within 71 seconds after take-off with its jet propulsion engine. . . . There are 21 explosions per second in the cylinders of the cyclone engine running run-ning at take-off power. . . . The principle of jet propulsion was discovered dis-covered by Hero of ancient Gree over 2,000 years ago |