Can someone explain how the number 2 engine works on a 3 engine aircraft. I've looked at multiple pics of 727's, DC-10's, L1011's and MD
-11's. You can see fan blades for the wing engines and I was just wondering how air is compressed for the #2 engine. Also why is the design so different from the L-1011 and 727, both have exhaust near where I would think the APU would be, versus the DC-10 and MD
-11 that has exhaust right out of the back of the engine? I searched for a while and couldn't find a post in tech ops to educate myself. Thanks in advance.