According to the Fédération Aéronautique Internationale's rules, for a flight to compete for a round-the-world speed record, it must cover a distance no less than the length of the Tropic of Cancer as well as cross all meridians and end on the same airfield where it started. This length is set to be 36787.559 kilometres
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you can attain lift at around 25mph with the right kind of plane.
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Ah yes, The "Picard Maneuver"!
(#3)
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