cyclon prop

[DAN BERRY]

What is the APC prop of choice for Cyclon 049 engines?

[Anonymous]

Hi Dan

You have a choice of 2 sizes; 5.5 x 2.5 or 5 x 3 APC’S. Any thing larger in diameter slows the engine down.

Ployd

[DAN BERRY]

Thanks

[Anonymous]

I have 5.6″ x 2.5 folding props for the Cyclon. Also spare prop nuts.

The 5.6″ turns at 29,000 and is a trimmed down version of the successful F1J prop.

http://www.glidetek.com/freeflight/f1j/FoldProps.asp

[DAN BERRY]

I needed a comparison base. Folders aren’t allowed for my needs. Thanks, as well.

[Anonymous]

Hi Dan
May I pose the question as to what class of free flight you will be using the the Cyclon in; Classic gas or AMA? My interest is purely academic.

Ployd

[DAN BERRY]

Classic. I might fly it in regular AMA gas, but I don’t seriously pursue it. I’m like a major league pitcher, I can’t bunt.

[Dean McGinnes]

Hey Luddite Dan

What model are you going to build for your bright shiney new Cyclon .049?

I have little experience with such a powerhouse. I am planning on building a Mini-Pearl for a Cox Tee Dee. I can’t imagine how big a Pearl would have to be to tame a Cyclon. 😯 😯

[DAN BERRY]

Hi Dean,
I’m not building for a Cyclon, It’s a Profi 049. Seller says It needs to go 33-36K rpm. I need to find a prop for it. I’m building a 270″ Marval. Whatever it does, it’ll do it quickly. A Pearl about the same size would work, but you’ll need geodetics. If you don’t believe me, look at Ronnies planes. He flies a 400″ Pearl-like monster with a .21. To say that it scoots right along is to miss the point. BTW, he says its about 16-17 oz.

[JLorbiecki]

Hi Dan…

5.5 x 2.5 is the best. The Profi is probably timed for U/C speed and thus the higher rpm. I seriously doubt that you will want to turn it that hard for a 1/2A model.

John

[DAN BERRY]

Hi John,
Bokker says its gotta be 31k to get in the power band. It really sounds horrible at 26K. I think thats what th 5.5×2.5 made. I cut a 5.5×2 to 4.5 and it shot to almost 32k. It was pulling much harder than the bigger prop. Diameter seems to be a key. Maybe the wide blades on the APC as well. I’m going to play with the combat props. 2.75 pitch, but narrower blades. Once agin, it’ll happen quickly.

[Anonymous]

For those who really want a good prop for the .049 Cyclon, I have 140 mm folding props that Henry Spence wants more of. Turns just a shade under 29,000.

The neat thing about the folders is that we have not seen one break. Just the fact that they fold keeps them from getting nailed on landing, even under power. I am guessing that you can get 10 seconds more in the glide by using a folder, not counting the improvement over the other fixed prop designs.

For Cyclon, GRS 1cc engines, I have those in stock also, just click on link below:

http://www.glidetek.com/Engines-F1J%20&%20C/Cyclon.asp

[DAN BERRY]

Is there a non-folding prop out there? Folders are not allowed for my purposes.

[Anonymous]

Hi Dan

I hate to state the bleed’n obvious but why don’t you go the Jims controlline site as I believe he now sells props to match your engine.

Ployd

[DAN BERRY]

I had not seen those props on Booker’s site. They appear to be the same as what I’ve already gotten. I am waiting for something resembling flying weather to try some things.

[Author]

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