It takes off by...
1)The pilot adding full flaps
2)The pilot adding full power
3)The pilot pulling bake on the stick and increasing lift.
The Maximum Take-Off Weight for a Boeing 747-100 is 333, 390kg; a Boeing 747-200 and 747-300 is 377,842kg; a Boeing 747-400 is 396,890kg; a Boeing 747-400ER is 412,775kg and the Boeing 747-8I is 442,253kg.
About one minute from brake release to lift off at maximum take off weight.
The lift off speed is dependant upon the weight of the aircraft. The heavier the aircraft the higher the speed. At maximum take off weight of 875,000 lbs (396,890 kgs) Vr (rotation speed) will be about 175 knots and V2 about 185 knots.
The maximum take-off weight of a Boeing 747-400 is 875,000 lbs
The maximum take-off weight of a Boeing 747-400 is 875,000 lbs
The maximum take off weight for a 747-400 is 875,000 pounds (396,890 kg.).
From a Boeing 747 Shuttle Carrying Aircraft (SCA).
377,842 kg.
The maximum take off weight of a 747-400 is 875,000 lbs or 396,890 kg.
The latest 747 models weigh over 480 tons at take-off.
Anything in excess of 12.5 degrees could result in a tail strike on lift off depending on aircraft weight and center of gravity.
The takeoff speed of a Boeing 747 can vary depending on factors such as weight, runway length, and weather conditions. However, generally speaking, the takeoff speed of a Boeing 747 is around 180-200 knots (207-230 mph).