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Building Tips and technical articles. => 1/2 A building. => Topic started by: HemiGTX on June 07, 2024, 06:01:44 PM

Title: 1/2A Pathfinder engine
Post by: HemiGTX on June 07, 2024, 06:01:44 PM
I picked up a built (but not flown) 1/2A Pathfinder at a swap meet.  It has a TeeDee .09 mounted in the nose.  Is this a viable engine for it?  If so, what props should I try? 

If not, what engines (preferably a readily available model) would be more appropriate? 
Title: Re: 1/2A Pathfinder engine
Post by: Dan McEntee on June 07, 2024, 08:54:48 PM
     Too big at .09. How tight is the .09 for fit? Does it have a big enough tank for the pattern? If that is all questionable, I would look at .061 Norvel, or maybe their .074 (?) if it's on the heavy side. Norvel is NV engines now. They have a web site, which is confusing , but once you get things figured out and an order placed, it takes about a week or so from California. The are in Russia, but I think they have a warehouse/distributor in California, because that is the return address on the packages.
   Type at you later,
    Dan McEntee
Title: Re: 1/2A Pathfinder engine
Post by: Motorman on June 07, 2024, 09:04:27 PM
I have an 061 Norvel on mine that I run on 20% nitro with 42' lines. Plenty of power running flat rich. Thinking about going to 52' lines with a leaner setting.

MM 8)
Title: Re: 1/2A Pathfinder engine
Post by: Dave Hull on June 07, 2024, 11:51:41 PM
I have seen one flown quite well on a Cox Medallion .049. The plane builds pretty light. If yours isn't, then I'd be looking for something more powerful.
Title: Re: 1/2A Pathfinder engine
Post by: HemiGTX on June 08, 2024, 01:35:25 PM
Thanks, guys.  I don’t think this airplane was built with obsessive attention to minimizing weight so, based on your recommendations, I just ordered an .061 Big Mig.