Russell Kent wrote:

Paul Lamar wrote:

Its been done with  turbo charger parts but I don't have the mechanical details.
You also have the losses in the roughly ten to one, two stage gear box required
if you go the turbo charger turbine route. Also coupling the inertia of the
turbine rotor with the engine through a step down gear box could be a problem if
rapid speed changes occur in one or the other. That was the reason for the fluid
couplings in the R3350 TC

Paul,
I haven't worked out the details, but I've got an idea I'd like to throw out for
evaluation.  Engine e-shaft drives the sun gear, planetary carrier drives the prop
shaft (2.85:1 reduction).  Exhaust gases blow turbine, turbine drives independant
reduction drive train which turns ring gear of PSRU. Voila! Turbo compound engine
without direct coupling.

Russell Kent

Yes something like that might work. It has been done with other
dual power sources driving the same load. In a way a center
differential in a 4 wheel drive vehicle is somewhat the
same principle in reverse.

Paul Lamar
 
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