Call it 90 mins (5400 seconds).
Earth circumference is approx 40000km so that's a surface velocity of ~7.4 km/sec
(, Mon 9 Dec 2013, 6:05, Reply)
Unless it's orbiting a few foot from the ground.
WOOOOOOOOOOOOOOOOOOOOSH!
Oh yeah, there it goes!
(, Mon 9 Dec 2013, 10:01, Reply)