Hi Doug,

I am anticipating a problem feeding 40-50 HP into the front
e-shaft through a multi V belt system.
Depending on the size of the smaller pulley there will be a
significant side load due to belt tension on the e-shaft. There
are two manifestation of this. Bending loads in the e-shaft and side
loads on the front main bearing. This can be mitigated some what by
mounting the alternator on the opposite side of the engine.
The ultimate solution would be an auxiliary bearing and shaft inside of the
new e-shaft pulley with a flex coupling to the existing e-shaft alternator
and water pump pulley.

For more info see http://www.rotaryeng.net/beltpsr4.gif

Paul Lamar ...No rotor no motor.

Paul

Yea for initial testing I'll whip up something to capture the load.

For the final design I might bring the power in the other end as I
originally planned. The semi-automatic,flat RX-4 bell housing I have has a
nice side slot and a large 1" id bearing mounted in the center.

Doug in Japan

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Opss just thought of something that will put a kabosh in your plan
of feeding the turbine power into the rear of the engine.

The stock  turbo charger compressor and hence the shaft you are going to
extract power from faces the FRONT side of the engine. Therefore the
Rotrex gear box needs to face the front side of the engine.

Other wise you will have to make a custom exhaust manifold and redo
the considerable oil and water plumbing for the turbo.

Which way does that Rotrex rotate looking at it from the compressor
wheel side? Clockwise or counter clock wise? I guess I can figure it
out by looking at the compressor wheel. OK that worked. It rotates
clockwise. Looking at the back side of the rotary it too rotates clockwise.
Now the question is will the Rotrex work feeding the torque
in from the compressor wheel while rotating the compressor wheel
clockwise. Normally the torque goes in the other end.

Ops again. Unfortunately the stock turbo looking at it from the back side of
the engine rotates counter clockwise. Darn!!!!

I guess you have no choice except to turn the turbo around, redo the plumbing
and build a custom exhaust manifold and feed the power into the back side of the engine. One advantage is the belt side load will have no affect on the e-shaft or main bearing.

I guess you knew that already. You are way ahead of me :)

For the production version maybe we should think about a gear box
and maybe a fluid coupling. It may be easier to do the gear box
than re arrange the turbo.

Paul Lamar ...No rotor no motor.

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