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Ground Speed
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12th Apr 2002, 12:07
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The Greaser
Join Date: Mar 2002
Location: UK
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Taking a cruising speed of M0.84 and OAT of -55 celsius gives a true airspeed of 559 statute miles per hour. Hence being in a jetstream with a tailwind component of only 90 mph would give you a groundspeed of 650. Perfectly feasible.
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