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Author Topic: Single bladed prop questions  (Read 479 times)
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DavidOWade
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« on: January 11, 2022, 10:33:50 AM »

1) Has anybody made a single-bladed freewheeler? (Thinking FAC legal...)
2) If single-bladed props are really more efficient why aren't the F1B guys using them?
3) Is a two-bladed prop of the same diameter really equivalent or should the diameter be reduced for similar performance?

Thermals,
David
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Stan
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« Reply #1 on: January 11, 2022, 10:55:45 AM »

Single blades are a waste of time, they are not as good as two blades.
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billdennis747
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« Reply #2 on: January 11, 2022, 03:39:16 PM »

I've flown several Coupes recently, with both single and twin blade. Haven't noticed any difference at my level of expertise but as you say, you rarely see single blades on modern models. Control line speed models  often use single blade props
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Starduster
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« Reply #3 on: January 11, 2022, 06:15:39 PM »

Way back in 1982 I was one of the first to build/fly the Casano Champ Stick from the Model Builder plans. I flew it with the single-bladed freewheeler (the use of the two-blades folded came later) it flew quite well.

A single bladed prop is one of those things that sound a lot better in theory than in real life. Here is an AOPA video:

https://www.youtube.com/watch?v=fhzWd2Ld12s
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raggedflyer
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« Reply #4 on: January 12, 2022, 08:03:02 AM »

Anyone tried a three bladed folder?
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USch
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« Reply #5 on: January 12, 2022, 08:27:22 AM »

Anyone tried a three bladed folder?

I know at least of one Coupe d'Hiver, the EL TRIPALA by Edgardo Fingueroa-Santiago, see FFQuarterly October 2011. But also power models F1C used three bladed folder on motors with gear box's.

Urs
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skyrocket
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« Reply #6 on: July 08, 2022, 10:29:29 AM »

I build a lot of old Brit light weights and have never looked back when using a single blader...my Skyrocket and Hep Cat both use them and they speak for themselves...this morning I built a single blader (free-wheel) for a new Skyrocket to fly in FAC and I'll let you how it goes...
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