Whats the fastest groundspeed you have ever experinced on an airplane? For me it was 712 on an American 777 going across the pond to London Hethrow. It stayed around the 700 mark for about 45 minutes and than dropped off to the 650 range and stayed there till we made landfall. Slowest experinced was -1 in a C172 last winter near Red Hook up state. That was pretty weird. How about you guys.
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