So I'm not sure if this has been covered, but something has been bugging me for a while.
On the 744, the GE and PW engines have a shape in which the exhaust stage from the core (or at least that's what I think it is) protrudes out the back of the nacelle. By contrast, the RR design features a nacelle that completely covers the entire engine.
Why? Why did RR choose such a different design from GE and PW? And why on the 777 did they not choose such a design?