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Engine basics => Engine set up tips => Topic started by: roger on April 24, 2009, 03:52:57 PM
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i have plans to build mike kevilles a-26 . what wingspan would be right if i put on 2 os. 25s?
roger
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Wharever it takes to get 650 -700 sq inches of area.
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??? well %^@
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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
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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^^