The Boeing 777-300 has only two engine types because it was designed at a very specific moment in aviation history, after ...
Just as with the automotive industry, there are a variety of aircraft engines designed to run on various types of fuels. Even electric planes are something we're likely to see more of in the future.
It's been a long time coming, but finally actual build work has begun on a new kind of airplane engine, one that might revolutionize the industry. NASA calls it the Hybrid Thermally Efficient Core ...