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› What "C" rating for EStratus will be ok?
10-12-2011 08:53 AM  7 years agoPost 1
HeliNerd

rrApprentice

Navarre, FL

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I am in the process of converting my Stratus to E power, and just started looking at batteries. I am running a hyperion 4035-500 and CC 120HV, 710 blades and flybarless. Looking specifically at the price difference between 65C batts and 35-40C batts, and I'm wondering will I be ok with 35-40C?

The math shows yes- 35C X 5amps=175 and I may only be pulling 100 or so. I do not fly anywhere near "pro" level- random tic-tocs, working on piro flips, just basic flip-floppin around the sky. Will I be dissappointed when borrowing someone's 65C pack, or will it even matter?

Thanks, I hope this isn't an over-asked question.

Ryan

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10-12-2011 06:32 PM  7 years agoPost 2
TJinGuy

rrProfessor

Socorro, NM - USA

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I can only assume you plan to use 12s? If so then you are looking at somewhere from 30-50A continuous, with peaks in the 100-150A range. Basically a 25C pack will easily do the job but higher C packs will have an easier time and may last longer. I would say pick up a set of cheap 35C packs and see how they do. Then if you decide you want more, you can but some more expensive packs and you are not out much.

- Chris

Team New Mexico
TJinTech

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10-12-2011 06:41 PM  7 years agoPost 3
Steff Giguere

rrProfessor

St-Eustache, Quebec, Canada

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I agree 25C would do the trick, but because of the weight of this heli I'd look for 35C. For your flights style, from what you told us, I don't think you need more than that unless your name is Nick Maxwell, Kyle Stacy, Bobby Watts and the like.

Team Synergy, Rail blades, Team Scorpion, V-Team

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10-12-2011 06:58 PM  7 years agoPost 4
chopperben1

rrApprentice

Ontario, Canada

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At 12s, definitely 35C is enough. After that, my view is that you are just adding weight that is not required. I find that packs in the 4200-4500mah in the 30-45c range are perfect.

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10-12-2011 07:11 PM  7 years agoPost 5
Darren Lee

rrElite Veteran

Woodstock, GA

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C ratings are overrated! There is no set standard for testing and rating between manufacturers so you really can't go by C rating alone.

I have first hand experience with "cheap" 25C packs blowing higher priced "name brand" 35C packs out of the water.

Team Synergy / Rail Blades / Morgan Fuel

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10-13-2011 08:09 AM  7 years agoPost 6
HeliNerd

rrApprentice

Navarre, FL

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Yes, 12S setup.

Agreed on the "C" rating not being consistent. I don't want to go cheap, but might get a set of gens ace as we've had really good luck with the R/C car batteries from them. Really eyeing a set of XPS and Voltz packs too in the 35-40C range.

Thanks for answering my question! And yeah, no big name style flying here

Ryan

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10-14-2011 08:25 PM  7 years agoPost 7
Richardmid1

rrProfessor

Leeds, England

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Turnigy's! I use 6s 5000 20-30C Turnigy's in my 700E and they are still going strong after 50+ cycles. $41! You just can't complain at that!

I also have Gens Ace packs (25 and 30C) and the IR is higher than the Turnigy 20C's!

Batteries are one thing you DO NOT get what you pay for!

Turnigy's also show the true cell manufacturers C ratings, other brands lie about C ratings.

Pack life and performance depends soley on how they are used and looked after.

You say you are only doing occasional tic tocs, flips etc. so im guessing you would be looking at 5-6 min flights?

Lets say you use 4000mah in 5.5 mins on a 700E, thats an average draw of only 43.6 amps, a 5000mah 20-30C pack can handle 100 amps continuously and 150 amp bursts which is more than enough for what you want.

60% of the time, it works every time!

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10-15-2011 10:38 AM  7 years agoPost 8
HeliNerd

rrApprentice

Navarre, FL

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Thanks guys, I'm going to go budget on 2 sets of 20-25C packs first, then go from there. I appreciate the help!

-Ryan

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10-15-2011 02:31 PM  7 years agoPost 9
PJRono

rrKey Veteran

Minnesota, Ya!

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I call the BS card on the Turnigy ratings. I have 20-30C 6S 5000s that are used in a heli under loads that should be acceptable for the battery and yet they have all gotten swollen. Once this happens, the power just starts to go down hill until they are unusable. I've also bought the newer 40-50C with the same results, in the same helis. My buddy seems to be having better results with his newer Nanotechs but only time will tell.

If you skip me I can't play!

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10-15-2011 03:17 PM  7 years agoPost 10
Chuck Bole

rrElite Veteran

Tulsa Ok. U.S.A.

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The E Stratus isn't all that heavy depending on how it's setup.
The first one we built was under 10Lbs without canopy, with 11S 3700
20C EVO's. Used stock gearing 8.18:1 with a Acrto 24-5 and it pulled itself around very good. With flybarless, and a good BEC i bet you could still get around that weight.

chuck

Team Synergy Field Representative / Scorpion / Thunder Power

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