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HomeAircraftHelicopterAerial Photography and Video › Who uses A123 12S 2P Batteries On Their AP Ships?
01-14-2009 12:25 AM  9 years agoPost 21
wjw

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Cape Coral, Florida usa

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Yea, I am understanding 2000 cycles on A123's.
I would guess I have between 200 -250 cycles on mine with no signs of old age and I really abuse these batteries.

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01-14-2009 12:35 AM  9 years agoPost 22
kookboy

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Vancouver, BC

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I've got two old 7S packs I put together 3 years ago for my old Swift AP (RIP)

They have got to have at least 5-600 charges on them. I abused those puppies and they are still as good as day 1.

Two single downsides to them :

Weight & Capacity

But that's for normal flying

For AP, they are perfect if you have the right ship/lift.

... But honey it was only $$$

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01-14-2009 12:39 AM  9 years agoPost 23
daytonabeach

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Oslo, Norway

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I love this

I think you will start notice reduced capacity on lipos already after only 50-60 charges, from what ive heard...

Never argue with an idiot, he'll drag you down to his level and beat you with experience...

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01-14-2009 01:28 AM  9 years agoPost 24
just4fun2rrApprentice - torrance - My Posts: All  Forum  Topic

what KV rating are you using for the lower Headspeed?

can you post your gear ratios?

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01-14-2009 02:14 AM  9 years agoPost 25
wjw

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Cape Coral, Florida usa

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Oh there you go asking questions I am not too sure of. I think its around 435KV. Would have to go to their website to be 100% sure but I know that is close.
I use the 85 tooth main with a 13 tooth pinion. I am not using gov, setting. Just personal preferance, it runs about 85%

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01-14-2009 02:43 AM  9 years agoPost 26
sean911sc

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San Diego

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I'm jumping in without doing any research on A123. So what would it take to replace my 12S lipo setup for a 500KV motor?

William S Harris

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01-14-2009 09:55 AM  9 years agoPost 27
fergus

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Ireland

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12s2p 4600mAh is the equivalent of a 10s 5000 lipo as you don't need to apply the 80% rule. What mah are you using in 12s?

I would imagine you would need 14s A123 to get the same voltage and likely need 2p for good duration (which will be heavy). That's 28cells at about 70 grams each. You could weigh your current pack for comparison.

Regards

Fergus

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01-14-2009 10:01 AM  9 years agoPost 28
sean911sc

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San Diego

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Running two (2) TP 6S1P 5000. Each at 744 grams (1488 grams total).

Looks like an extra 472 grams (1.04 lbs.)

William S Harris

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01-14-2009 10:19 AM  9 years agoPost 29
fergus

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Ireland

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Yes that would be right.

Do you need 12slipo. With gearing or a change of motor you might manage with 12s2p A123.

As a side note for those considering 14s. The Mastech powersupply ( one way to fast charge at 4C) is rated for 50volts. You need 51.1volts for 14s. Mine does go to 51.9volts but that might be just a fluke. Ask Brian to check the output before shipping. Also beware of rip off versions on fleabay. Don't ask how I know

Regards

Fergus

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01-14-2009 10:22 AM  9 years agoPost 30
sean911sc

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San Diego

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Pardon my lack of A123 lookups. A123 cell is rated at?

William S Harris

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01-14-2009 10:30 AM  9 years agoPost 31
fergus

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Ireland

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30c plus 50c burst. In 2p they hold over 3volts per cell right to the end of the pack.

Regards

Fergus

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01-14-2009 10:37 AM  9 years agoPost 32
sean911sc

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San Diego

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This might be an option. As weight is and issue as I'm at 16 lbs. on a 710mm setup.

William S Harris

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01-14-2009 10:44 AM  9 years agoPost 33
fergus

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Ireland

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Sean it will be a tight squeeze in the logo frames. They won't go in with cells upright as is the standard method in the Jokers. I will check on my 600 later if it is an option for you.

Regards

Fergus

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01-14-2009 12:39 PM  9 years agoPost 34
BULLSEYE

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Texas

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fergus,

What charger are you using?

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01-14-2009 12:41 PM  9 years agoPost 35
daytonabeach

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Oslo, Norway

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Hes using a Mastech power supply which charge at 20 amps in 15 minutes from empty to full on a 12s 2p 4600mah pack.
its not computerized, so youll have to watch it manually with a timer...

Never argue with an idiot, he'll drag you down to his level and beat you with experience...

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01-14-2009 12:52 PM  9 years agoPost 36
fergus

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Ireland

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Yep as Chris says a mastech5020 power supply.

I had a link to a video and a description of the charging process in my gallery. I reworked my scripts a week ago and it currently isn't shown. I will get it up again this evening.

Regards

Fergus

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01-14-2009 01:05 PM  9 years agoPost 37
BULLSEYE

rrApprentice

Texas

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Hes using a Mastech power supply which charge at 20 amps in 15 minutes from empty to full on a 12s 2p 4600mah pack.
I see, that's pretty cool.
I had a link to a video and a description of the charging process in my gallery. I reworked my scripts a week ago and it currently isn't shown. I will get it up again this evening.
Can't wait to see that Thanks fergus!!

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01-14-2009 01:21 PM  9 years agoPost 38
fergus

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Ireland

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The vid is not mine. It is posted on YouTube by one of the guys on RCGroups I think. If you search for mastech and a123 you should find it.

Either way I will get the link back up in my gallery later.

Regards

Fergus

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01-14-2009 01:29 PM  9 years agoPost 39
daytonabeach

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Oslo, Norway

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I think its this guy, he just revised the video, i remember his american accent

its 2 parts

http://www.youtube.com/watch?v=JktFKU0a3QY

Never argue with an idiot, he'll drag you down to his level and beat you with experience...

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01-14-2009 04:27 PM  9 years agoPost 40
rerazor

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Mich.

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HomeAircraftHelicopterAerial Photography and Video › Who uses A123 12S 2P Batteries On Their AP Ships?
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