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AXI 2826/12 Watts help please

Old 07-27-2005, 10:16 PM
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MiGBane
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Default AXI 2826/12 Watts help please

First off, I'm new to electrics. I have 6 nitro planes and just built my first electric. It's a House of Balsa P51 Mustang (47" wing, 24oz. no motor/ESC/batts). Fantastic kit. Highly recommended...

I'm switching to AXI from Kontronik. Have burned up three motors trying to find their practical limitation on Wattage. I was shooting for 350-ish Watts for solid aerobatics and I've cooked enough geared Fun 400-xx to change horses. Too late, someone mentioned that 250W was probably a realistic limit for this motor. I also encountered several burnouts due to motor lead insulation pulling away from the motor casing and the leads shorting to the case. Cost me an ESC also. I wish Kontronik would just spec their recommended range of acceptable input power or loss, but no -- again it falls on the consumer.

Checking the boards here, it looks like very few are in the Kontronik boat and tons of people are using AXI with some luck. With the sale at Hobby-Lobby, I couldn't resist looking at the 2826/12. Half the cost of my Kontronik and no gearbox. Not bad. Does anyone have any practical experience with this motor? I am looking to run 5s LiPos (I'd prefer voltage up and amps down to use my existing batt packs). My target Wattage is 350-400. Can this motor do this reliably? From the application charts on the Hobby-Lobby webpage and the 'great motor test' linked from another post on this forum, it appears that it is feasible. Motocalc seems happy, but I question the motor temp calcs after my Kontronik experience.

Any help greatly appreciated!

Old 07-27-2005, 10:45 PM
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DKB
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Default RE: AXI 2826/12 Watts help please

I have several Axi 2826/12's. I would not use 5 cells. I am using a 4S3250 Kokam pack with a 14-7 APC prop. This is in a Skygull Decathlon. Draws about 37 amps and the Astro Whattmeter says 547 Watts.
Old 07-28-2005, 08:58 AM
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Matt Kirsch
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Default RE: AXI 2826/12 Watts help please

The final authority on AXi motors is www.modelmotors.cz. No offense meant to Hobby Lobby and their fine products, but their "application charts" for most of their motors don't make much sense. Watts is Volts times Amps, but none of their numbers add up.

The Great Electric Motor Test is at www.flyingmodels.org. Link works okay for me.

Oh yeah, the 2826/12 will do 400 Watts all day long and not even break a sweat. I've got one coming in the mail and plan on running at least 500 Watts through it for a .40 size ARF warbird.
Old 07-28-2005, 09:51 PM
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A10FLYR
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Default RE: AXI 2826/12 Watts help please

I've been running a 2826/12 on 6S2P, APC 11X7E in my magic this whole year now with NO problems. Don't remember the watts tho...
Old 07-28-2005, 10:43 PM
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MiGBane
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Default RE: AXI 2826/12 Watts help please

Thanks all! Your help is GREATLY appreciated. I love my AstroFlight WhattMeter -- best investment I've made yet in my electric adventure.
I think I did well in ordering the AXI. Anyone want to buy a warranty replacement Kontronik 400-23 or 400-28? (lol)

If anyone else is running an AXI 2826/12, please feel free to post your batt/prop and Watts.
Old 08-11-2005, 11:34 PM
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MiGBane
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Default RE: AXI 2826/12 Watts help please

As a follow-up -- hoping that this thread might help somebody down the line...

I've had the AXI 2826/12 installed for a few weeks now and man, am I impressed! I'm running 5s LiPos (no problem) with a CC45 ESC (no BEC), measuring 400W-450W to the motor, and running 40-45 degrees C after 15 minute flights (on 90+ degree F days). Very nice motor.
Old 08-15-2005, 06:25 AM
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c-grain
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Default RE: AXI 2826/12 Watts help please

I have 3 2826-10s and have run them on 4s&5s.With the 4s I have got from 460W-600+W and with the 5s turning a 9x9 I've read over 800W!Ofcourse I never use WOT for more than 6 or 7 secs.,But these motors are among the most powerfull for their size & Wt. I've ever seen![sm=bananahead.gif]

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