Hey guys here comes your dream 55 HP one rotor motor.
Can a two rotor be far behind? I am so happy to see they
have come around to selling this great little engine.
Thank you Chris Dries.

http://www.austroengine.at/products/rotary-engines/rotary-engines.html

"Since launching our first line of products, the AE50R series, our 50
horsepower
rotary engine product,has built a successful track record, with more than
700
installations in motor gliders and cam copters of leading OEMs. Our
rotary
engines are small, lightweight, and have an outstanding low vibration.

Their reliability and adaptability enabled the development of a larger,
stronger
rotary engine, the IAE75R, which will soon be available."

--------------------------------------------
To: Engineering at Austro Engines.
Dear Sir or Madam,

Try a longer intake manifold.

Paul Lamar

Chris,

Have  you contacted Austro for a _price_ on the engine (+PSRU?)?  I
surfed around their site using Bable Fish translation but found no
pricing data.  Apparently you have to ask Sales for a quote.  The weight
looks good and their story of test cell runs on all the engines sounds
good.

BTW, their graph of KW vs. RPM is goofy.  If the KW(HP) is circa 40.2 KW
at 7200, and the torque is still going up like it shows, there is no way
the KW(HP) gets truncated to a flat limit from 7200 to 7800 rpm.  It
must continue to go up also.

Joe

You are quite right Joe. I noticed that too. The torque shows still
going up and up, not likely at 7800 rpm, or if so, the power must rise too.
Does this mean we cant trust the data? It is the same old 294 cc charge
cooled engine with an added compressor.

Rolf

No compressor. That is a rotor cooling blower.
The rotor is pure air cooled and not charge cooled.
Cooling air comes in around the base of the rotor in
a part of the end housing that is not contacted by
the side seals.

The porting is straight p-port. The reason the torque is still
going up at 7800 RPM is because of the shortness of the intake
manifold. With that short of a manifold the engine is probably tuned
for over 12,000 RPM. I am guessing. With a 24 inch manifold torque
peak would be closer to 6,000 RPM and there would be more HP
at 7800 RPM. I am not guessing :)

I think there is a thermal limit on the HP and that
is why the HP curve is truncated.

IMHO an oil cooled rotor would probably solve that problem
and improve the BSFC as that cooling blower consumes HP from
the e-shaft.

Paul Lamar

Looks promising in 2-rotor form. What are the thermodynamic
implications of having a rotor that wide? Will that design have
excessive heat loss vs. a narrower rotor of larger "stroke"?

Also, is there a disadvantage to having two plugs at the same station
around the housing vs leading/trailing? High idle required?

I love that it's peripheral ported and has aluminum housings from the
factory. That doesn't happen to be an aluminum rotor too, does it?

-Chris

No aluminum rotor yet :)

IMHO a wide rotor is better. The best combustion chamber is a sphere,
second best a cylinder, third a cube and last a rectangular box.

The AIXRO also has a very wide rotor.

http://www.youtube.com/watch?v=iMGYx-P4iEY

Another positive factor could be a wide
rotor has a better bearing area to weight ratio.
Wide rotors are also good for p-porting.

IMHO the 16B is a mistake.

I have no opinion on the dual plugs one way or another.
They probably put them in there because it is a certified
aircraft engine both in one rotor and two rotor form.

Paul Lamar