Paul lamer wrote:

 Apparently they are reselling the AIXRO go kart engine from Germany.
 That is the one Bear used to fly over Everest

It is but I think that it is a step up in the sense that it will be aircraft
ready - such as altitude compensating fuel injection, reduction gearing for
a prop, liquid cooling system etc.

I was also wondering. There have been a lot of recent discussions on turbo
compounding of the rotary engine to improve fuel consumption down to about
0.35 lbs/hr/Hp (I can't recall the exact realistic target fuel consumption
number).

Would it make any sense to use something like the Rotron 25 Hp or 45 Hp
engine as a developmental test bed to prove the technology, test various
methods. The idea being this may be a cost effective development approach
due to smaller component sizing etc.

In rocket engine development this approach is taken all the time. It is
typical to start testing with an engine that is about 1/10th to 1/5th the
thrust. It saves a lot of money and allows the all important experience base
on the system and components to develop at a much lower cost than jumping to
the end goal.

Aircraft engines are fairly scalable, yet rocket engines are generally
considered to be non scalable for a variety of reasons, yet the small rocket
engine approach works very well to get to the end game at the overall lowest
cost and shortest time frame.

Thoughts?

Cheers,
Brian

Yes and no. For that size AIXRO engine the turbine gear box becomes
pocket watch sized :) Also the AIXRO engine is quite expensive due to the euro
to dollar ratio. One can find a running Mazda 12A for free almost.

All you need is a turbo and a gear box. I'll loan a gear box and a turbo to the
right person that can demonstrate the ability and where-with-all to complete
it and test it on a dyno. Here are some pictures of what I have so far.

Another possibility is obtain a blow down turbine from an R3350 TC
and connect it to a three rotor. I am saving a 3 rotor for that possibility.
Paul Carey in WA Aus almost did it.

Paul Lamar

Paul, could we do away with the compesser section and go directly to the
reduction drive? Milo

Yes it can be done but you lose the high altitude capability where
things really start to pay off big time.

Paul Lamar

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