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how fast are aeroplanes going when the take off
-- ian Summerhayes, October 17, 2005
A typical rotation speed for a four-seat airplane is 65 knots or about 75 miles per hour. A big jet might leave the ground at closer to 150 miles per hour. The bigger and faster the airplane, the faster it must get rolling on the runway before taking off into the air,
-- Philip Greenspun, October 24, 2005