2006-09-05 01:11:54 · 11 answers · asked by JOHN W 1 in Cars & Transportation ➔ Aircraft
Takeoff speeds and top air speeds vary based on the (aircraft weight) temperature and the altitude, so average is a hard thing to define. But just to give you some numbers: The "book" for the 747-400 says the takeoff speed is around 175 mph, the cruising speed is .82 mach (about 567 mph) and the max speed is around .92 mach (about 635 mph). The 747 is one of the faster commercial aircraft out there.
2006-09-05 01:19:39 · answer #1 · answered by R1volta 6 · 2⤊ 0⤋
John, your answers received so far seem about right.
My experience has been that you must take into account total aircraft weight, local air temperature, (it makes a difference to lift).
Altitude of the runway, length of said runway. etc.
You can work all this out before hitting the throttles, but if doing it quickly in a Military version of the 747, about 180 kts airspeed should see you OK for V2 climb-out.
Just get the carriage up quick, and crack on.
2006-09-05 09:08:55 · answer #2 · answered by Bob the Boat 6 · 0⤊ 0⤋
it depends on the take off weight of the aircraft but at max take of weight a climb out speed of approx 140 knots (about 160 mph)this gives a sufficient margin above its stalling speed to ensure a safe take off
before take off the pilots will performance plan from the aircrafts perfomance manual the key speeds such as vi (decision speed) v2 (climbout speed etc) the heavier the aircraft the faster it will need to be to develop sufficient lift to fly
2006-09-05 08:25:21 · answer #3 · answered by grandpig 1 · 1⤊ 0⤋
Around 130-150mph
2006-09-05 08:13:17 · answer #4 · answered by Anonymous · 0⤊ 0⤋
depending on the size
from 130/140mph for average sizes ones to as much as 160/180mph for 747's/A380 (approximately)
all depending on wind speed, wind direction, and a host of other lil factors
2006-09-05 08:22:04 · answer #5 · answered by Nighteyes 3 · 0⤊ 0⤋
I was told 180 knots ,give or take,depending on fuel, passenger load ,atmospheric conditions and the altitude of the airport.
2006-09-05 08:24:46 · answer #6 · answered by Paul O 2 · 0⤊ 0⤋
As long as its fast enough to produce an uplift on the wings
2006-09-05 08:22:50 · answer #7 · answered by jameshgt 2 · 0⤊ 0⤋
About 180mph
2006-09-05 18:16:43 · answer #8 · answered by ..... 2 · 0⤊ 0⤋
154 MPH
2006-09-05 17:33:10 · answer #9 · answered by lobster101 2 · 0⤊ 0⤋
150-175mph
2006-09-05 21:54:28 · answer #10 · answered by jerry 7 · 0⤊ 0⤋