Mach 1.01 GLEX (HBJER)


#1

flightaware.com/live/flight/HBJE … G/tracklog

scroll to 8:39pm
look at the speed in the 4th colum (610kts)

Isn’t that a bit too fast for a GLEX?


#2

Radar displays ground speed not true or calibrated airspeed.

An extreme example – if you’re going 100kts and have a 700kt tail wind, you’re only moving through the air at 100kts even though you’re moving across the ground at 800kts, and thus are far below the speed of sound.


#3

FWIW, 610kts @ FL410 is about M1.06 on a standard day.