A drum is a musical percussion instrument, consisting of a membrane which is usually stretched taut over a cylindrical tube that is open at the other end. The membrane is struck, either with the hand or some other object, and the tube forms a resonating chamber for the resulting sound. A drummer is a person who plays the drums.
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Over the next five years, design work continued, aided by data from the British Aerospace EAP prototype which had first flown in 1986, and culminating in the ...