How fast does a Boeing 747 take off?
A fully loaded Boeing 747 A ‘Jumbo Jet’ on a normal long-haul flight would take off at a speed of around 160 knots, or 184 mph. Calculated takeoff speeds vary with environmental conditions, runway length, and weight.
How fast does a Boeing 747 land?
A 747 “Jumbo Jet” would typically land at a speed of around 145 to 150 knots (166 mph to 172 mph), depending on the landing flap setting selected.
Most airlines and aircraft have a facility to reduce thrust (or use temperatures) for takeoff. This happens on runways where the aircraft has extra performance in hand, for example the aircraft does not need the full length of the runway to take off. Large commercial aircraft rarely use full engine power for takeoff, as most runways at large airports are long enough to accommodate thrust reduction. Take-off thrust can be as low as 75% of maximum thrust.
Taking off with reduced thrust reduces the temperature to which the various engine components are exposed. This in turn can significantly reduce engine wear and therefore maintenance costs, and ultimately extend engine life.
Extra speed for landing
The higher the flap setting, the lower the take-off and landing speed. Jumbo Jets typically land at 25 or 40 flaps. Pilots typically fly at the approach speed faster than the actual touchdown speed to allow for a speed “buffer” in the event of airspeed fluctuations. This extra speed is “purged” during the flare or simply put, the overspeed decreases when the nose is raised just before touchdown. In light wind conditions we would add 5 knots to the approach speed, but in strong wind conditions up to 20 knots can be added.
B747-400 Maximum take-off weight
The maximum takeoff weight of the B747 is 396,000 KGS / 875,000 LBS
B747-400 maximum landing weight
The maximum landing weight for the B747 is 285,000 KGS / 630,000 LBS
Have you ever wondered how much fuel a Jumbo Jet burns? This page might interest you.