|Jul 10, 2005, 09:54 AM|
CBA Electric Power 1600 12C
Electric Power 1600 12C
Note: This pack was damaged in a crash after around 15 flights so no long term useage will be available.
I assembled a 3S pack from single cells supplied by vendor. Cell weight 37.8 grams each. 3S pack with 12ga. super flex,deans Ultra,PQ taps connector,velcor, 128 grams (4.5oz.) .840 Thick / 1.370 width / 3.500 Length.
The third discharge was a flight on my ESP3D ,Hi Max 2015/4100, 6.6:1 ,GWS EP 12X6 . AUW 16.4 oz. 2.33 sq. ft. wing area ,wing loading,7.0 oz per sq. ft.. Performance great, 18 minutes of very aerobatic flight battery 98F, 1,484 mAh used, average amp.load during flight 4.95. Open volts at end of flight10.8.
Note: 9.5A used as maximum discharge due to limitations of CBA unit.
Added: Static run with above setup as measured with Astro Flight 101 Watt Meter and Glow Bee Tach.
14.4 amps / 10.8 volts / 156 watts / 5,100 RPMs.
Added a comparison (overlay) with EP 1600 12C with Apogee 2080 10-12C and Kokam 2000 15C.
Added: Overlays of this 1600 12C / Thunder Power 1320 ProLite 13C and unnamed 1600 15C.
All cells at 8Amps discharge which is no exactly a fair match up but I have flown all three packs in my ESPA3D and to be perfectly honest there is just not that much difference.
The TP ProLite is the liightest @ 3.1 oz.
?? 1300 weighs 3.75 oz.
ElectricPower 1600 wieghs 4.5 oz.
|Jun 27, 2006, 05:50 AM|
Aahh.... Just what I was looking for, thanks for the graphs Charles.
Looks like the XUS packs are really a pretty good buy and it looks like they seem to hold their voltage pretty well if I'm reading your graph correctly. Thanks for the data on the EP1600 pack, I really appreciate it. I am definitely interested in the 2200 12C pack from their site, although I know they know offer 20C models.... However, I don't think I will really be needing the extra discharge ability that a 20C pack has to offer compared to the 2200 12C pack because I really don't think I'll be using the 2200 12C pack in many situations where it'll be pushed over a 7-8C discharge at WOT.
I was really looking hard at those Maxamps packs, but now I'm kind of leaning towards these XUS packs.... They seem to be really good. Although it would be nice to have the extra discharge ability that the Maxamps 2200 20C packs have, I don't think I'll need it to be honest. I think the highest voltage I might think of using eventually would be something like a small twin brushless set-up, or even a small twin brushed/lipo set-up to push or pull twin engine planes..... However, even those set-ups hopefully wouldn't be pulling any more than 21-22 amps at WOT, and the plane's I'd be running them in probabbly wouldn't need any more than 1/2 throttle to run nicely, so I think this XUS pack would do the job nicely.
The only thing I'm concerned about is the possibility of the amp consumption of an Alfa fan/Himax 2025-5300 3S set-up. MAybe it's because a lot of different people use different sized 3S packs, but it seems like I got a lot of varied answers when asking about the amp draw of that set-up. However, the range of amp draw was anywhere from about 18 to 25 amps static from different users..... However, even in the worst case scenario where the motor would be drawing 25 amps static, I guess that would even be ok because the little jet I was thinking of running that set-up in would probably have to be flown at about 1/2-3/4 throttle max just for me to be able to keep up with it! Haha, that set-up has been know to push some airframes around at about 85-90mph, so I'd probably want to take it easy anyway!
Anyhow, thanks for the help, and I'll look forward to the possibility of checking out one of these packs sometime.
|Dec 14, 2006, 07:51 PM|
Joined Dec 2005
Why dont these graphs show discharge at
C rating X capacity??
Thats where the true test is, not at
5C discharges for a 12C battery.
|Dec 14, 2006, 08:16 PM|
The CBA has a 100 to 150 watt limit depending on the Ah of the battery.
You could always look at RD's single cell higher C discharge graph
I have to disagree about it being misleading. Sure more informative than a LiPoly Label IMO.
5C equals a 12 min. flight to a flat overdischarge battery. Leaving 20% would eqaul a 10 minute flight .
Some use LiPolys so they can have 15,20,30 min. or longer flights. That is a range of 2C to 4C.
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