What's the take-off speed of a Boeing 747?

Question

Watching videos online, I'm trying to get some idea of the rate of acceleration from stand-still? Many thanks.

Answer 1

Its about 290 Km/h.

Answer 2

Varies according to aircraft weight, runway height, air density, temperature, runway length and the captain's mood. Pre-calculated each time.

Generally around the 155 mark and about 50 seconds from start.  On long, low elevation runways lower acceleration is used; on shorter, higher runways the acceleration can be surprisingly swift - of necessity.

Answer 3

800,000lbs take off wt requires 155knots.

Answer 4

It varies depending on aircraft model, aircraft weight, field elevation, and atmospheric conditions.  Weight is the most significant variable.

The answer is anywhere from 140 to 200 knots (161 to 230 mph).

Answer 5

Its from 150-160mph and from standstill it can take anywhere between 40secs and 65secs to get airborne depending on load.

Answer 6

155 mph, o-60 12sec,

Answer 7

the FMC sets up the speed according to the load of the aircraft. Generally it is about 145-150 kts.

My fully loaded acft in FS2004 has a rotation speed of around 147 kts.

Answer 8

If you only play flight sim you are NOT qualified to answer this question.  Why don't you let a real 74 pilot answer this question, I know there are some that write in.  In conclusion, if you only play flight sim, or you time the takeoff on your watch, or anything else except fly the 74, STFU!!!!!!!!!  

BTW to the moron who times the takeoffs, besides the fact that the speeds differ from takeoff to takeoff by large amounts, often times the planes are taking off with less than full thrust or are flexing.  This would increase the ground roll and thereby increase the amount of time to attain a certain speed.

Answer 9

Depends on the altitude and the length of the airfield. The higher the airport, the thinner the air and requires a longer runway. Also, the pilots, if the runway is longer, takeoff in a longer distance to be economical. At sea level at an international airport it will takeoff in 9,902 ft (3,018 m). It's speed would be ~200 nautical mil per hour (knots).

Answer 10

http://www.aviationearth.com/AircraftDat...

http://www.aviationearth.com/

Check the above links

Answer 11

sometimes I look at my wristwatch to see how long it takes from dead stop/full throttle to lift-off and in over 50 flights, I find that it averages about 40 seconds.

Not sure of ground speed though.

Answer 12

Depends on total payload (weight of aircraft including passengers, baggage and fuel).

I would say the average was about 170kt (314.8kmh or 195.6mph), but there is a lot of variables to be considered.