That's true. Aircraft rarely run at full throttle even at takeoff. In fact twin-engined aircraft like the 777 can apparently still take off even if they experi

That's true. Aircraft rarely run at full throttle even at takeoff. In fact twin-engined aircraft like the 777 can apparently still take off even if they experience an engine shutdown right before liftoff. Everything after that requires less power. Among other things you burn fuel which reduces the aircraft weight.