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| Gas Engines and Power Discuss all aspects of giant scale power systems |
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04-07-2008, 09:53 AM
| #1 (permalink) |
| Arf or not to Arf   Join Date: Jan 2006 Location: Denmark
Posts: 134
 |  3W 106 correct prop size?
Hi i am running in my 3w 106 with a 26x12 3blade engel ss i have only used around 1 gal and still with mineral oil 40:1 i am getting 5700 rpm i want to switch to a 26x10 or 27x10 biela 3 blade for the scale looks and for a little more pull without switching to a 2 blade prop , but not shure wich size 3 blade is best for the 106, any info make my day..
__________________ www.123hjemmeside.dk/Giantscale |
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04-07-2008, 10:11 AM
| #2 (permalink) |
| Pro Pit Biaatch   Join Date: Jan 2006 Location: Cumming, GA.
Posts: 904
| Re: 3W 106 correct prop size?
Try a 25 x 12 three blade or a 26 x 10... Blair
__________________ Extreme Flight RC www.extremeflightrc.com Aircraft International www.aircraftinternational.com Higher Plane Productions Mercury Adhesives Johnson Aviation Last edited by BR289; 04-07-2008 at 10:24 AM. |
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04-07-2008, 10:13 AM
| #3 (permalink) |
| Mother Huckin'  Join Date: Jan 2006 Location: Caguas, Puerto Rico Age: 22
Posts: 3,198
| Re: 3W 106 correct prop size?
Give a Mejzlik 25x12 a try.
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04-07-2008, 10:24 AM
| #4 (permalink) |
| Pro Pit Biaatch Join Date: Jan 2006 Location: Cumming, GA.
Posts: 904
| Re: 3W 106 correct prop size?
Actually, I think the 25 x 12 would be the best....
__________________ Extreme Flight RC www.extremeflightrc.com Aircraft International www.aircraftinternational.com Higher Plane Productions Mercury Adhesives Johnson Aviation |
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04-07-2008, 11:02 AM
| #6 (permalink) |
| Arf or not to Arf Join Date: Jan 2006 Location: Denmark
Posts: 134
| Re: 3W 106 correct prop size?
tanks i think i want the 26x10 for better braking also maby.
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04-11-2008, 06:36 PM
| #7 (permalink) |
| Bad-ass Super Contributer!  Join Date: Jul 2006 Location: California
Posts: 1,169
| Re: 3W 106 correct prop size?
Do you want torque or horsepower? I'll get some serious arguements (I have the dyno results, they don't) on this but using a 28-10 two blade Biela the 106cs develops it's best torque at around 5850 rpm. It's best horsepower is in the area of 7,000 rpm but torque drops about 25-30% from peak at that point. So a larger prop at lower rpm may well provide better performance than a smaller prop at higher rpm. |
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