As far as I know, and according to Wikipedia, most commercial airliners already use turbofans [1], which are high-bypass turbojets [2]. Unless you were referrin

As far as I know, and according to Wikipedia, most commercial airliners already use turbofans [1], which are high-bypass turbojets [2]. Unless you were referring to turboprops? [1]: https://en.wikipedia.org/wiki/Turbofan https://en.wikipedia.org/wiki/Turbofan