3 ms·What is their engine? An airframe without an engine is, best case, a drone programme.by JumpCrisscross 3mo agoWhat is their engine? An airframe without an engine is, best case, a drone programme.a34729t 3mo agoet tu Boom?hahahaa 3mo agoA glider?phonon 3mo agoPratt & Whitney PW2040 turbofan engine, same as the Boeing 757 and the C-17. They say that the plane itself is so efficient they don't need a cutting edge efficient engine.