OOOHHH!
Only one rotor drive can pass through a rotating joint.
Differential on my car springs to mind - but then again perhaps I am missing a salient point. Help Sas!
I shall refine my original question tomorrow. Perhaps.
David - Ignoramus V22 wise.
Well after a good nights sleep I am ready for the fray!
With two engines driving into a coupling gearbox with one output shaft going to both Rotors/propellors so that they are linked in speed and drive, it does not seem to me to matter where the engines are within reason. I just feel that the complexity of tilting engines/oil/hydraulic systems et all is not an elegant solution.
I am of course assuming that the rotors are constant speed in flight and that all control is by some form of collective/cyclic pitch change. Loss of one engine will not matter and the drive will be coming from the remaining engine in the centre of the aircraft rather than across the whole shebang.
SAS - do I know what I am talking about?