Hans Conser wrote:

Okay, what engine is this:

http://stittind.com/Rotary75HP/Rotary.htm

Sure! Probably a Wankel Germany engine.

Here is an old message on the subject.
Also you can just see the logo in the attached picture.


Subject: Rotary for Mini 500 helicoptor.
   Date: Mon, 06 Dec 1999 14:05:34 -0500
  From:  Paul <rotaryeng@earthlink.net> (by way of plamar@echelon.ca)
    To:  plamar@echelon.ca

Hi Paul
Have you come across the American built EcoMax single rotor Mazda based
rotary engine?  I am looking to replace the two stroke 618 Rotax in my Mini
500 single seat helicopter, and this unit looks like it may be the answer.
There is one successfully  flying with German Wankel twin rotor rotary
engine, and another being installed presently that I am aware of, and others
I presume.

The EcoMax on paper has more power and is lighter than the German unit, but
I don't know it personally.  I am not an expert on rotary engines I would
appreciate your comment. Are there any good reasons why rotary engines are
not used to power  helicopters more.

Regards
David Maree
South Africa

Yes I have heard of it but it will be too heavy for your
purposes. Best to get a two rotor Wankel GmbH or Midwest
Rotary engine. both are around 100 HP and weigh about
150 pounds or so.  I believe the Ecomax will come in around
200 pounds with PSRU. BTW one rotor engines are always at
a disadvantage as they require larger balance weights.

Paul Lamar
 
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