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hef19898

The overlap between space rockets and aircraft engines and airliners either zero so.

Also, Boeing isn't buildong aircraft engines.

Do you know if they use Rolls Royce engines?

Rolls Royce is big in big engines. Not so much in smaller single aisle aircraft. Boeing 777 and 787 have Rolls Royce engine options. The Rolls Royce Trent engine family is advanced in having three spools compared to the usual two by competitors.

Short search turned up at least one:

https://en.m.wikipedia.org/wiki/Rolls-Royce_BR700

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