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Old Jul 29, 2011, 06:29 AM
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Dekker's Avatar
Delft, Netherlands
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I am going to try them too:



The 4x4000mAh packs are going into my Voodoo 600 heli as 2x10s packs.
The 5000mAh packs are going into a Logo500 6s setup.
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Old Aug 06, 2011, 08:14 AM
A man with too many toys
United States
Joined Feb 2001
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5300 30c

I thought you all might be interested in the IR of new vs. well broken in packs. To measure IR I used my CellPro 10s at a 1C charge and the temperature was in the mid 70ís.

New out of the box
Pack 1 - 4s 5300: 1.6, 1.5, 1.6, 1.3
Pack 2 - 3s 5300: 1.5, 1.9, 2.7


After 3 weeks of fairly hard flying (maybe 20 to 30 cycles?)
Pack 1 - 4s 5300: 1.2, 1.1, 1.2, 1.0
Pack 2 - 3s 5300: 1.1, 1.0, 1.7


They definitely perform better after properly broken in. I made about 5 easy flights for breakin.



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Old Aug 06, 2011, 09:15 AM
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Haralson County GA. USA
Joined Oct 2004
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Quote:
They definitely perform better after properly broken in. I made about 5 easy flights for breakin.
Tell me it ain't so!
That is one of my sermons that few have taken to heart over the years. It is a shame so few can read and understand a graph as I have clearly shown the increase in performance long before anyone much started to take IR readings.

Charles
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Old Aug 06, 2011, 12:43 PM
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Houston, TX
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Great info, rcman. I usually do 1 to 2 soft flights as break-in. Good to know that it'll pay off.
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Old Aug 07, 2011, 03:05 PM
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Poland
Joined Feb 2011
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Today I tested my Gens Ace 2200mAh 25C 3s1p pack. Below is their 1st cycle discharge test at average ~21Amps
Average voltage 10.99V and capacity 2181mAh gives ~24Wh of energy. Much better than my equal size zippy/turnigy/rhino packs


Now charging to ~2300mAh.
According to previous posts their performance improves over time (first ones are weaker than 5th-10th) We will see.
Next cycles soon.
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Old Aug 07, 2011, 04:06 PM
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Poland
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2nd test:
2193mah with average voltage 11.15V under ~21A gives 24,4Wh
My smaller discharge station (300W max):

2nd cycle results:


I'm closer to build my hotliner - these will be goooood lipos. I have never seen >11V average voltage for 3s pack under almost 10C discharge rate. Forgot to say that the IR of my pack is just 8mOhm (measured with iCharger106B+)

Next I will try to push the limits with constant 40-50A -need to rebuild my bigger discharge station.
This will simulate the power consumption in the air during 100mph flight
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Last edited by Mieciu; Aug 07, 2011 at 04:09 PM. Reason: typo
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Old Aug 07, 2011, 05:44 PM
Southern Pride
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Haralson County GA. USA
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GensAce 3S 2200 at 10-50A CC discharges in 10A steps along with other test.

http://www.rcgroups.com/forums/showthread.php?t=1283407
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Old Aug 09, 2011, 02:15 AM
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Poland
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cycles 3 to 5 exactly the same: 2200mAh under ~21Amps with average voltage 11,15-11,17V.
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Old Aug 09, 2011, 08:45 AM
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Meiciu,
So does that mean 5 soft break-in cycles is unnecessary and 2 to 3 is sufficient?
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Old Aug 09, 2011, 09:02 AM
Southern Pride
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Haralson County GA. USA
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These break-in conditioning discharges really should not be taken so deep. It is not good to discharge over 80% of capacity.

Yes I know most all of my LiPoly test show discharges past this point but remember I am testing and do not expect these LiPolys which I test to last nearly as long as one I would only be using under normal conditions.

Charles
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Old Aug 09, 2011, 05:07 PM
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Poland
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dude109 - only 1 break-in cycle is enough, then you can (ab)use them.
everydayflyer - agree unless you start to compete with others :P
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Old Sep 02, 2011, 05:18 PM
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I have a few Gens ace 25C packs. The wires exit the packs at really awkward angles. Is it ok to cut the covering to allow the wires to move?
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Old Sep 02, 2011, 05:33 PM
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Canada, AB, Edmonton
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Rather than that, do like the suggestion in Post #24 above. Works very well.
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Old Sep 02, 2011, 06:19 PM
A man with too many toys
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Quote:
Originally Posted by like2fly! View Post
I have a few Gens ace 25C packs. The wires exit the packs at really awkward angles. Is it ok to cut the covering to allow the wires to move?
Thatís the only thing that I donít like. Thereís not always room to bend it over the pack and tape it down. For some installations you have to trim a little from the end covering so you can bend it out straight.

I sure hope they fix that problem for the next batch. Does anyone know if the manufacturer is aware of what a pain it is for customers?

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Old Sep 03, 2011, 02:10 AM
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Quote:
Originally Posted by RC Man View Post
Thatís the only thing that I donít like. Thereís not always room to bend it over the pack and tape it down. For some installations you have to trim a little from the end covering so you can bend it out straight.

I sure hope they fix that problem for the next batch. Does anyone know if the manufacturer is aware of what a pain it is for customers?


I hope they don't change the design, the Gens ace packs are today among the best in construction and design, wires exit like that makes it good, becas you can secure the wires within the pack at the terminal ends.

I fly and test a lot of planes all sizes, i can't say that a pack with this design has ever been a problem to me, my guess is that if they change it so the wires comes out in another way... there would be people having problem with that also.

You don't have to be so careful with the wires (bending/ pulling....) as for example a HC pack, were the wire can fall off just by looking at it its no problem if you have to bend the wires on Gens ace packs some to make it fit in your model.
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