There has been a major break through in charged cooled
rotary engines by going to high tech and real expensive silicon
nitride roller bearing for the rotor bearings. The max RPM has gone
up from about 7500 RPM to 11,000 RPM. The 2 rotor AIXRO version
based on the Norton geometry is now putting out 130 HP
at 11,000  while weighing only about  22 kg or about 50 pounds.
The former MidWest/Austro version was limited to about 100 HP.
The P-port Mazda 13B rotary will produce about 300 HP at 9500
to 10,500 RPM with pressure fed plain bearings including
the rotor bearings.

Paul Lamar

 Paul,
 Where do i find info and specs on the 2-rotor Aixro you just
 mentioned?

 Steve Wolpin

 Contact:
 Poul Henrik Woelfle AIXRO <ph.woelfle@woelfle-engineering.com

 http://www.woelfle-engineering.com/

 This is the engine in supercharged one rotor form and on
 a para-glider that flew over Mt. Everest at 27,000 feet.

 Paul Lamar

paul, the material you sent appears to be one-rotor; i'm wondering about
the 2-rotor 130bhp @ 11,000 rpm to which you referred.
steve

Rotaries are modular. From one to five rotors in line.
I don't have any pictures of it yet. I just heard about
it from Poul Woelfle in April at Aero in Friedrichshafen.

It is the same geometry and size as this Austro engines two
rotor but with out the blower and ducting on top. Austro
engines have sold over 500 one rotor versions for use
in Alexander Schleicher motor gliders.

http://www.alexander-schleicher.de/index_e.htm

Austro engines is designing a 50% larger engine
with 75 HP per rotor.

These are also widely used in Israeli UAV's manufactured by
an Israeli company called Elbit.

These engines are all in the same family. Only minor
differences in castings, porting and weight. All were
derived from the Norton Motor cycle unit. They can all
benefit from silicon nitride roller bearings.

Paul Lamar



thanks paul.
let us know when you see more data on the aixro multi-rotor offerings.
steve

All the light sport guys can hardly wate :)

Paul Lamar