Science: Fastest Drone

One of the problems of modern air training is finding a fast-enough target for fighter pilots and antiaircraft gunners to practice on. Towed targets are much too slow, and they don't maneuver realistically. The ordinary "drones" (small remotely controlled airplanes) are not fast enough either.

Last week the Navy announced that its gunners would soon have a target worthy of their fire: the Martin KDM-1, a pilotless plane powered with a ramjet engine, designed to fly close to the speed of sound. The little drone is carried into the air under the wing of...

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