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Alternate engine possibility for Firestar or Firefly

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jason(at)trek-tech.com
Guest

Posted: Tue Aug 15, 2006 8:27 am Post subject: Alternate engine possibility for Firestar or Firefly

Hello  all,

  

 I ran across this  today on the web.  I don't know anything about it, but I thought I would  pass it along.

  

 http://www.rotary-xr40.com/

  

 Jason

 MKIIIC BMW R100  (finished and FAA approved, just trying to find the best place to test fly  it)

 Portland,  OR

   [quote][b]

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Ralph Hoover

Joined: 09 Jan 2006
Posts: 206
Location: Central Ohio

Posted: Tue Aug 15, 2006 12:34 pm Post subject: Re: Alternate engine possibility for Firestar or Firefly

Interesting. Single cylinder with reduced vibration, rotary. Single carb. I do however wonder the fairness of the 'efciency rating against the 503 DIDC (which I have of my firestar), as being 4 GPH. Appears to be a very inifficient RPM and speed for the test aircraft with the 503. Dont know.



Radiator and electric start at 55 #. Pretty impresive.

"Phantom X-1, 260 lb pilot and 30 lbs of fuel". Thats a heavey duty pilot, even from my standards (220#). Guess with all that it might be close to 4 gph. If the pilot is the same one in the picture on your opening page, he has too have a huge butt, caues he is about average in build.



I do have a question. How do you "derate an engine from 52 hp to 40 hp? If its based on rpm, then I understand, even though I could rev engine past the rated RPM.



Soyfused (verses Cornfused, which I would probably be dead by now), in Ohio Ralph!

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a58r(at)verizon.net
Guest

Posted: Tue Aug 15, 2006 2:00 pm Post subject: Alternate engine possibility for Firestar or Firefly

The classic method of sqeezing more hp outa rotaries is higher rpm.  

In some of my very early Wankels, before I discovered they were so  

fragile, I could get them to 10K, but they didn't last too long! Very  

smooth engine. Had first ones in '66...single rotor with a type of CDI.



regards,

Bob N.

http://www.angelfire.com/rpg/ronoy/



do not archive

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Steve Boetto

Joined: 11 Jan 2006
Posts: 364

Posted: Wed Aug 16, 2006 5:43 pm Post subject: Alternate engine possibility for Firestar or Firefly

Bryan and I saw this at SnF the last two years in a row. It really has a  potential for the Firefly.

 I would love to put one on the Firefly Floatplane, BUT, It's exhaust  configuration does not lend itself to a pusher application. You can probably  work around it but have been waiting to see how the engine works for a while. It  has a really nice alternator and starter at less weight than a 447. Maybe the  importer will come up with a pusher configuration.

  

 Steve

  Firefly 007 on floats

  [quote][b]

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