A Boeing 747-400 is the largest airplane that Boeing make. It has four engines and was designed in 1988. It is the second most recent Boeing 747 that Boeing have made.

Boeing is the manufacturer, the 747 is the model/design type and the 400 is the variation type.

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.

The Boeing 747-400 and the Boeing 747-8 are still being made but the Boeing 747-100, -200 and -300 have been discontinued.

The Boeing 747-400 series have a PW4000 turbofan engine aircraft. Each 747 carries 4 of them; 2 on each wing.