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Engine basics => Engine set up tips => Topic started by: roger on April 24, 2009, 03:52:57 PM

Title: a-26i have plans to build mike kevills
Post by: roger on April 24, 2009, 03:52:57 PM
i have plans to build mike kevilles a-26 . what wingspan would be right if i put on 2 os. 25s?
roger
Title: Re: a-26i have plans to build mike kevills
Post by: John Miller on April 24, 2009, 05:35:26 PM
Wharever it takes to get 650 -700 sq inches of area.
Title: Re: a-26i have plans to build mike kevills
Post by: roger on April 25, 2009, 07:38:27 PM
 ??? well %^@
Title: Re: a-26i have plans to build mike kevills
Post by: Steve Helmick on May 02, 2009, 05:49:04 PM
Bearing in mind that Mike's A-26 is a profile scale model, not a stunter, I would think that something less expansive would be a better bet. I'd take a look at 55" span or 500 sq. inches, whichever is bigger. As always, lighter is better, up to a point. If it is too fragile and constantly needs repairs, then you built too light. Repairs do weigh more than building it a tad bit tougher to start with. It also depends on what your flying surface is like...cow pasture or smooth asphalt.  H^^ Steve
Title: Re: a-26i have plans to build mike kevills
Post by: John Miller on May 02, 2009, 08:02:32 PM
Steve, though I don't really disagree with your thinking, 500 sq inches would be fine for a pair of .15's. We're running 620 sq inches on a twin stunter with a pair of .15's.

Of course, a pair of .25's on a plane that small will either race around, or you can run it way rich for a neat 4 stroking sound.  H^^