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Electric Stunt => Gettin all AMP'ed up! => Topic started by: Crist Rigotti on December 10, 2013, 07:16:29 PM

Title: Cobra electric motors are on sale!
Post by: Crist Rigotti on December 10, 2013, 07:16:29 PM
Innov8tive Designs has them on sale!  Like 30% off.

http://www.innov8tivedesigns.com/index.php?cPath=21_120_122
Title: Re: Cobra electric motors are on sale!
Post by: Paul Taylor on December 15, 2013, 09:12:22 PM
What size would be equal to a 50 size IC?
Title: Re: Cobra electric motors are on sale!
Post by: William DeMauro on December 16, 2013, 05:06:22 AM
Better yet what do you want to put it in?
Title: Re: Cobra electric motors are on sale!
Post by: Paul Taylor on December 16, 2013, 11:27:21 AM
Was thinking about a vector or SV 11 H^^
Title: Re: Cobra electric motors are on sale!
Post by: William DeMauro on December 16, 2013, 02:21:19 PM
For the SV11 4 cell setup-  http://www.innov8tivedesigns.com/product_info.php?cPath=21_120_122&products_id=840&osCsid=43161239709c9e3b48abf0086923a10e    or this one  http://www.innov8tivedesigns.com/product_info.php?cPath=21_120_123&products_id=846&osCsid=43161239709c9e3b48abf0086923a10e

If you want a 5 cell set up let me know

For Vector use the 2820/12  970kv  or the 2820/14 840kv both should be ok on 4 cells
Title: Re: Cobra electric motors are on sale!
Post by: Paul Taylor on December 17, 2013, 05:49:39 PM
Thanks William.
Title: Re: Cobra electric motors are on sale!
Post by: Allan Perret on December 28, 2013, 08:34:23 AM
Hey William: 
I would like to know your recommendations for the Cobra 5-cell motor.  Also would there be a significant weight difference in the battery pack needed 4 vs 5 cell ?  Thanks for the help.
 :)
Title: Re: Cobra electric motors are on sale!
Post by: Dan Bregar on December 28, 2013, 12:42:29 PM
I'm not William, but the 2826/12 may be the mtr. you want, depending on what size airplane you intend to put it in.  Crist Rigotti has been using this mtr. very succesfully on 5 cell packs. He may chime in here also untill William can respond to your querry.  :)  Just make sure you don't over-dissipate it.  LL~
Title: Re: Cobra electric motors are on sale!
Post by: William DeMauro on December 28, 2013, 08:41:37 PM
Allen,
The 2826/12 like Dan says or the 3515/18 should work fine for most of our needs with a 5 cell. For some the 3520/14 may be a better choice. I have no idea what you want to use it in, but those would be your 5 cell choices in the majority of applications. Unless you plan on using those super light Thunderpower 5s2700 mah batteries(10.5 oz I think) your weight for batteries stays about the same weather you use a 4 cell set up or a 5 cell set up. Less cells=lower voltage=higher mah needed.  More cell =higher voltage=lower mah needed. So using very rough imprecise math (I'm no engineer) lets say a 4s4000 weighs 400 grams on average(I know I'm close), I would expect the average 5s 3000-5s 3300 to weigh about the same in most case as long as the C ratings are also comparable. If you go  to Hobby King's website and use their battery heaven battery finder program and plug numbers in for 4 and 5 cell packs using the numbers I just gave you will see that this actually works. Don't forget to sort by weight after you plug the numbers in.
Title: Re: Cobra electric motors are on sale!
Post by: Leo Mehl on December 29, 2013, 11:39:46 AM
Innov8tive Designs has them on sale!  Like 30% off.

http://www.innov8tivedesigns.com/index.php?cPath=21_120_122

Ya I got mine a 2628-12
Title: Re: Cobra electric motors are on sale!
Post by: John Cralley on December 29, 2013, 07:54:10 PM
Thanks for the heads up Crist!!  y1

I have one on order for the Vector that I am building this winter!! You saved me enough to buy a cheapie battery. LOL
Title: Re: Cobra electric motors are on sale!
Post by: Darkstar1 on December 29, 2013, 09:25:10 PM
Hey William:  
I would like to know your recommendations for the Cobra 5-cell motor.  Also would there be a significant weight difference in the battery pack needed 4 vs 5 cell ?  Thanks for the help.
 :)

Allan
I bought a Cobra C-2826/12 Brushless Motor, Kv=760 for a 5s setup for a Brodak Bearcat. It is a copy of the AXI
Ill let U know what I think as soon as I can get it going.