An aircraft’s speed relative to the ground. Compare with airspeed.
- Ground speed was on average only slightly faster than the mean air speed, and the scatter was considerably larger for ground speeds than for air speeds.
- Every three seconds I have a loop giving my bearing and, in between, my ground speed and air speed.
- In previous charts for this day I added ten mph to the ground speed to get the air speed for each of the pilots.
Definition of ground speed in:
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