mechanical

Hey guys, I've been getting interested in aircraft parts and I'm interested in knowing more about air intakes. Particularly this one question I've had. What are the benefits of the two mainly-used methods of intakes; specifically overhead and chin intakes? (As in how do they effect engine...

I'm a structure man, not an engine man so there's one thing that I don't understand. AFAIK the coupling of the two engines was trough a mechanical device and my question is: how can two engines coupled by a mechanical device based on gearwheels have a tuning so identical to exactly give the...