Great Video. How many Lbs of thrust from 747 ?

According to Wikipedia the Pratt & Whitney JT9D engines make between 48,000 - 53,000 lbs each depending on the model.

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Exactly.

All 747s except the -100 could be ordered with engines from either Pratt & Whitney, General Electric, or Rolls Royce.

-100s came with PW engines. Those made about 43,000 lbs.

Todays -400s make in the neighborhood of 58,000 lb per engine.

Most turbofan engines are rarely run that hard. Takeoffs are generally made with flex power depending on ambient temp, field elevation, and aircraft weight.

Our standard takeoffs are done at 90% power, with the setting gradually reduced as outside air temperature increases due to interstage turbine temperature limits.

Thanks for the explanation, Dan...ya geek.

Good stuff..

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