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Old 04-11-2012, 05:27 PM   #1
jmcmike
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Default 3 blade da 100l

Picked up a 35% dalton with a da100l, cans and mejzlik 25x12s 3 blade. Was wondering if a 26x12n 3 blade would give me a little less load on the engine, plane is on the heavy side.

Thanks guys!
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Old 04-11-2012, 05:32 PM   #2
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I'm guessing it would load even more. I ran the 25x12s on my DA120 for awhile. Nice prop on either with a 28# plane.

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Old 04-11-2012, 05:46 PM   #3
jmcmike
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I read this in an earlier thread PE Reivers said but there was not much more on it.
I think not that many people have used both props in comparison.
My preliminary guess is that the S prop puts a 30% larger load than the N-prop.
putting your numbers in my calculator, running both props at 7000 rpm I get 14 hp for the 26x12N and 15.5 hp for the 25x12S.
adjusting for hp, I can see that the 26x12N pulls harder all the way form static to top speed, due to it's larger diameter.
I would need mass distribution data to predict spool-up between the two, but methinks the 26x12 wins.

Last edited by jmcmike; 04-11-2012 at 06:01 PM. Reason: Reivers
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