Why does the Boeing 777-300 have 2 engine types?

The Boeing 777-300 has only two engine types because it was designed at a very specific moment in aviation history, after ...

Here’s How Much Longer The Boeing 777X’s Wingspan Is Compared To The 777-300ER

So the question is just how much longer are the 777X wings? To get directly to the point, the 777X will have wings that are 7 ...
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Why Didn’t Boeing Build The 777 With 4 Engines?

After Boeing produced the twin-engine Boeing 767 and the four-engine Boeing 747, one would have almost expected the Boeing 777 to have four engines. Quadjets and tri-jets had dominated long-haul ...