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 engin

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.