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Old Oct 20, 2005, 08:37 AM
Eventually...I will fly
Israel
Joined Oct 2004
884 Posts
power options for an e-sailplane

looking for an outrunner to power my omei sailplane, not looking for crazy power. just for power to climb and get out of trouble. i intend to mostly use it from the slope.
i dont want do use very large lipo packs like 3S2P and the best would to saty with my current 12c 3S2200 PQ.
i would say i need around 220 Watts. and a 10x6 folding prop
what would fit me best?
thanks
Eran
P.s if any of the things i wrote is nonsense please feel free to correct me.
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Old Oct 20, 2005, 12:38 PM
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darrell_f's Avatar
United States, FL, Melbourne Beach
Joined Dec 2003
430 Posts
AXI works for me

I have several 2808/24 axi's. 9X6 folding prop with 3S 2100 gives me near vertical on a 32 oz 2 meter glider (not omei). It's about 18amps/180 watts. If your glider is heavier, you might to need to go to the next size 28 series. Check the amount of space in you glider's nose and the diameter of the Axi, it was a real tight fit to get mine in.
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Old Oct 20, 2005, 01:12 PM
jrb
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Edina, MN, USA
Joined Oct 1999
11,395 Posts
Outrunners only?

This isn't, but sure is nice! http://www.rcgroups.com/forums/showp...48&postcount=3
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Old Oct 20, 2005, 05:41 PM
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John O'Sullivan's Avatar
Nova Scotia Canada
Joined Jan 2004
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I use an AXi 2820/12 on my Omei and get a climb rate of around 1700 ft/min. on a 2100 LiPoly. I also have another with an AXI 2826/12 but have not checked the climb rate.
I use AXI 2808/24s on several of my other smaller models. They are a good motor. This should be good for more sedate but adequate performance on the Omei. On a 10x6 APC electric prop you should get about 180 watts drifting off to 155 using a TP 2100 12C pack. The Omei fuselage is a bit light in glass layup. reinforce around wing and canopy openings with galss or carbon tow.
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Old Oct 20, 2005, 08:09 PM
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Dr Kiwi's Avatar
Chattanooga, Tennessee, United States
Joined May 2003
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A Phasor 15/4 might be good - it can turn a 10x6 well at 200W or so.
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Old Oct 21, 2005, 03:11 AM
cp1
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Hannover, Germany
Joined Aug 2005
263 Posts
An AXI 2826-10 would net you about 1000g of static thrust easily (@15A) without stressing the battery. Once you change to a 20C pack you could choose a 11x7 or even bigger.

Regards
Christian
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Old Oct 21, 2005, 08:39 AM
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Austin, TX
Joined Sep 2005
11,497 Posts
I'm glad to see this thread, as I was about to ask the same question! I'm going to scratch build a "mini-hotliner-on-a-dime" (own design) and was considering using a low Kv outrunner like the JustGoFly 450XT with a folding prop. I realize most gliders used planetary-geared high Kv inrunners, but (in theory, anyway) a low Kv outrunner should do OK, and it'll fit the slim nose of a glider.

I'm shooting for an AUW of 16-20 oz, and have a couple of PQ2200 3S packs I could use. Or, I might go 8-10 cells NiMh if the weight budget allows it.

What's been the general experience with the 450XT? I have a CC Phoenix 25 (currently in my Mini Funtana), but was also looking at their new Thunderbird 18 for this setup.

Heck, if it doesn't work well in the glider, I'm sure it'll be fine for the 25 oz warbird model I'm working on.

Comments?

-Chris
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