The Boeing 747 was MUCH BIGGER than the Boeing 707 that it replaced. (CBS News/Boeing)
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The Boeing 747 was MUCH BIGGER than the Boeing 707 that it replaced. (CBS News/Boeing)
Why does the 707 have 3 engines?
It doesn’t.The aircraft is equipped with the Pratt & Whitney JT3D turbofan. The turbofan nacelle at the forward end of the engine has a larger diameter than the aft nacelle. That is what you are seeing.