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Old Aug 19, 2005, 09:09 AM
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4 Blade props and spinner

Does anyone know where I can buy 4 blade electric props and spinners?

Something 11" or smaller, but with higher pitch if possible.

I've found a few places that sell electric 4 blade props, but to get a decent pitch, the blades are huge (13+").

I also need a 2" spinner for 4 blade props.

Any ideas?
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Old Aug 19, 2005, 09:16 AM
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GWS makes this one...
http://www2.towerhobbies.com/cgi-bin...?&I=LXHHZ3&P=7

And someone else makes a 8x8 or something like that. But that is it...
http://www.rcgroups.com/forums/showt...ghlight=c+119+

Then if you have money you can get VArio....
http://www.aircraft-world.com/shopdi...variable+pitch

Mike
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Old Aug 19, 2005, 09:35 AM
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Thanks.

The 10X8 actually keeps most of the flight characteristics I had with a larger 2 blade prop (in motocalc).

I noticed that the GWS uses a 5.5mm nut (0.2165354 inch)....and my motor shaft is 1/4" (.25 inch).

Anything special I need to do to get it to work with my motor? Drill it out to accept 1/4"?

In addition, who makes a 4 blade spinner to match that prop?
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Old Aug 19, 2005, 09:49 AM
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markmm....what is the application for this?

Yes you can drill/reem it out, but I would not put significant juice through the GWS props...

Mike
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Old Aug 19, 2005, 10:04 AM
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I'm redesigning a P51 to make it a scale "H" model and I need a 4 blade prop and spinner.

I found one person that put a four blade (APC) on the exact model (though he kept the model a "D" version for the most part). I PM'd him in hopes he could point me in the right direction.

4 blades obviously are not that popular, but this has to be scale, so I need the four blader.

I'm open to other 4 blade props...I just can't seem to find them...yet.
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Old Aug 19, 2005, 10:08 AM
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How many ams/watts are you going to be putting into the power system. That is my question. GWS does make a 4 blade prop.

They are not very popular in RC application due to the way our power systems work. Typically they are less efficient than their two part counterparts.

What I am getting at here is that is a slowflier prop, and can't take significant power before it would fly apart!

Mike
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Old Aug 19, 2005, 10:19 AM
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Putting in 20-25 amps, 220-262 watts. Of course I could be wrong...I'm still new to this and I'm still finding my way around motocalc, but that's what I'm finding the amps/watts are.

I understand that 4 blade props are less efficient. But this MUST be scale...I won't settle for anything less than scale on this build (within reason of course).
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Old Aug 19, 2005, 10:20 AM
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No way can you use the GWS prop, maybe to 10-11 amps, but I would not go above that.

You will need to use the Vario system. Since it must be scale the price should not be an issue!

Mike
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Old Aug 19, 2005, 10:30 AM
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I looked at the Vario stuff, but it is a bit confusing. Do you buy each blade seperately and assemble it?

I didn't see any 4 blade configurations...it all looked like individual blades.

I just looked again. It does appear that you install and adjust each blade. But they only have hubs for 6.0mm shafts and the shaft on my motor is 6.35mm.
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Old Aug 19, 2005, 10:40 AM
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Look at the hubs pick 4 bladed then just buy 4 blades of the proper length. CK. Aircraft-World.com What motor has a 6.35 motor shaft? DD
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Old Aug 19, 2005, 10:41 AM
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Yes you buy a hub for two three or four blades. Then you buy individual blades to go in the "holes" on the hub.

So you need a 4 blade hub, 4 of the same blades and then it allows you to select the Pitch you want! Very cool.....

Mike
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Old Aug 19, 2005, 10:45 AM
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Cool but, mounting a spinner on the 6B Hub can be a problem.DD
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Old Aug 19, 2005, 10:50 AM
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Zinger propellers makes a wide selection of 3 and 4 blade props. They work well and the shape of the blades have a scale appearance.

http://www.zingerpropeller.com/
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Old Aug 19, 2005, 10:53 AM
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Quote:
Originally Posted by diver don
Look at the hubs pick 4 bladed then just buy 4 blades of the proper length. CK. Aircraft-World.com What motor has a 6.35 motor shaft? DD

Astro 020 803G...it has a 1/4" (6.35mm) shaft.
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Old Aug 19, 2005, 10:55 AM
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Quote:
Originally Posted by pdawg
Zinger propellers makes a wide selection of 3 and 4 blade props. They work well and the shape of the blades have a scale appearance.

http://www.zingerpropeller.com/
Will any of their props work with electric?
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