Ken Reed writes:

After takeoff at North Platte, we actually saw (briefly) a ground speed on the GPS of 31kts!!

One trip a few years ago, El Paso to Tucson at the MEA of 12,000 ft, I
had a GPS ground speed for a portion of the flight in cruise of 27 kts.
In a Mooney. Well over 100 kt headwinds.

In a history of the war in the Aleutians, I read of a C-47 flying backwards;
the headwinds exceeded the IAS....
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