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Ultrastar engin recommendation

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jimumble(at)myway.com
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Posted: Sun Dec 02, 2007 3:30 am Post subject: Ultrastar engin recommendation

Hi ultralight fliers of the Ultra stars



Im new on the board ,have been flying a while bought my ultra star so Im not very technical about the specks 

Could some one tell me what size engine  could I put on it or should I stick with cuyuna ulII02 Has N#  would like a 

  4 stroke  prop. size and recommendations Thanks Jimmy    ps I see another jim so Im jimmy

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d-m-hague(at)comcast.net
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Posted: Sun Dec 02, 2007 6:01 am Post subject: Ultrastar engin recommendation

At 06:30 AM 12/2/2007, jim wrote:

  	  Quote: 	
		  Im new on the board ,have been flying a while bought my ultra star so Im not very technical about the specks 

 Could some one tell me what size engine could I put on it or should I stick with cuyuna ulII02 Has N# would like a 

 4 stroke prop. size and recommendations Thanks Jimmy ps I see another jim so Im jimmy 	


 Hi Jimmy, the Cuyuna is quite adequate for the Ultrastar, it's what I have on mine.  The Cuyuna is probably the lightest of the suitable engines, but if yours in N-numbered you're not concerned about making 103 weight.  Quite a few are flying around with Rotax 447's too., and I've heard of at least one with a Subaru engine, but you definitely will pay a large weight penalty for a 4-stroke.  Cuyuna's are the least expensive to work on but there are a lot of people out there who are familiar with the Rotax.  I suppose you could put a 1/2 VW engine on an Ultrastar but I've never heard of it being done.



 My Cuyuna is nearly new but if it I needed to replace it my short list would probably be another Cuyuna or perhaps the Simonini Victor 1+ (2 stroke, single cylinder, dual ignition).



 -Dana

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worrybear(at)verizon.net
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Posted: Sun Dec 02, 2007 6:48 am Post subject: Ultrastar engin recommendation

Jimmy,  I lost my cuyuna on my  Ultrastar in July and spent a lot of time trying to figure out alternatives to  the UL202.  The 447 or 503 were the only viable options I could come up  with and even those would require motor mount modifications to use the gear box  instead of the cuyuna belt drive.   Mounting any 4 cycle seemed to be  impossible.  My suggestion would be rebuild the  cuyuna.

  

 Dan Walter

 Ultrastar and Druine  Turbulent

 Palmyra, Pa.

  

  

 [quote]   ---

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jimumble(at)myway.com
Guest

Posted: Sun Dec 02, 2007 5:06 pm Post subject: Ultrastar engin recommendation

Hi Dan Thanks 

 

Im thinking I don't want to mess with the structure,so would like to use the cuyuna . How long have you been flyen it 

 





--- On Sun 12/02, Dan Walter < worrybear(at)verizon.net > wrote:



[quote]From: Dan Walter [mailto: worrybear(at)verizon.net]

To: kolb-list(at)matronics.com

Date: Sun, 02 Dec 2007 09:40:19 -0500

Subject: Re: Ultrastar engin recommendation



    Jimmy,  I lost my cuyuna on my Ultrastar in July and spent a lot of time trying to figure out alternatives to the UL202.  The 447 or 503 were the only viable options I could come up with and even those would require motor mount modifications to use the gear box instead of the cuyuna belt drive.   Mounting any 4 cycle seemed to be impossible.  My suggestion would be rebuild the cuyuna.

 

Dan Walter

Ultrastar and Druine Turbulent

Palmyra, Pa.

 

 

[quote] ---

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jb92563

Joined: 23 Mar 2007
Posts: 314
Location: Southern California

Posted: Mon Dec 03, 2007 8:29 am Post subject: Re: Ultrastar engin recommendation

Mine also has the UL-202 that I fixed after a seizure (Engine not me ) but the early models also had a Cuyuna 430, which I also have as a spare.



Parts are still easy to get for the Cuyuna 202 and fixing one is pretty easy.



You need 30-40 HP and if weight is not limited to 254 lbs I would personally try a light 4 stroke like a 1/2 VW.



The UL-202 weighs about 58lbs, the 430 about 65lbs and a 1/2 VW about 95 lbs and produce 35, ~35 and ~40 HP respectively.

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_________________
Ray

Kolb UltraStar (Cuyuna UL-202)
Moni MotorGlider
Schreder HP-11 Glider
Grob 109 Motorglider

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