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Old Sep 18, 2012, 12:12 PM
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United States, GA, Dublin
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Anything other than LiPo?

All the posts, videos, and information all over the internet about LiPo explosions and fires really make me nervous.

What other alternatives are viable for use in electric park jet type foam planes?
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Old Sep 18, 2012, 12:50 PM
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United States, MN
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Not with the same power to weight ratio. Life/A123 are about the only other option unless you want to go back to nimh/nicd. As long as you take reasonable care of your lipos the chance of an incident is very very low. And lipos don't "explode". They catch fire yes, but they don't explode. If you read the rules for basic lipo care you will find that 99.9% of the incidents out there someone didn't follow one of the basic easy to follow rules of care.
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Old Sep 19, 2012, 12:13 AM
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LiPos are out of the question. The potential for incendiary results is too high a risk for me to take.

There must be other alternatives that are suitable, even if there is a minor weight penalty.
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Old Sep 19, 2012, 12:37 AM
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As grimbeaver stated, LiFe is another option. Of the LiFe chemistry cells, the cylindrical LiFePO4 cells from A123 Systems have the most proven track record. Until about 3-4 years ago, they had better power density than lipolys and many of us flew them exclusively. They are nearly bulletproof and seemingly thrive on abuse for 100's and 100's of cycles with negligible loss in performance. They're also as safe as any battery technology can possibly be.

Do a B&C forum search on 'A123' and you will be reading for days.

Mark
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Old Sep 19, 2012, 01:34 AM
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United States, MN, Minneapolis
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Originally Posted by mrforsyth View Post
As grimbeaver stated, LiFe is another option. Of the LiFe chemistry cells, the cylindrical LiFePO4 cells from A123 Systems have the most proven track record. Until about 3-4 years ago, they had better power density than lipolys and many of us flew them exclusively. They are nearly bulletproof and seemingly thrive on abuse for 100's and 100's of cycles with negligible loss in performance. They're also as safe as any battery technology can possibly be.

Do a B&C forum search on 'A123' and you will be reading for days.

Mark
interested to know A123 seller/store...
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Old Sep 19, 2012, 03:01 AM
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Originally Posted by lancer525 View Post
LiPos are out of the question. The potential for incendiary results is too high a risk for me to take.

There must be other alternatives that are suitable, even if there is a minor weight penalty.
If you just finished a crash course on lipo batteries via Google, I'm not surprised you would shy away from them. Lots of hyperbole.
There are cases of lipo fires in cell phones and laptop computers too.

Most of us who use Lipo Batteries follow the natural laws of LIPO.
Most of the charger manufacturers incorporate safety checks in their products.
There are a lot less incidents now, then there were a couple years ago.

(LIFEP04) type batteries are expensive. A123 is a company that is big in the industry.
Much of the world production is going for electric cars.

NiCad (nickel cadmium) is toxic to the environment.
NiMh (nickel metal hydride) is less toxic.
Glow motors are an option, the receiver can be powered by 4 alkaline AA cells. They're called "slimers" for the goo they are covered with after a flight.

BTW; Welcome to RCG
Lots of information, lots of helpful folks.
Regards
Rick
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Old Sep 19, 2012, 06:21 AM
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Originally Posted by lancer525 View Post
LiPos are out of the question. The potential for incendiary results is too high a risk for me to take.
Then I presume you don't travel in airplanes or drive a car.

Seriously though. You are placing too much emphasis on the reports of mishaps. It is a case of a few problems overwhelming the tens of thousands (probably millions) of successful uses of LiPo's. In ten years of LiPo usage I have only witnessed three instances of LiPo fire and they were all the result of crashes.

If LiPo's are properly cared for they are not dangerous. Charge them with a quality charger to prevent over charging, do not over discharge when flying, keep them at storage charge when not in use, and protect them from physical damage and you will never experience a problem.

If you still have concerns store them in a steel box and charge them in a LiPo Sack.

Glen
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Old Sep 19, 2012, 09:55 AM
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If you still have concerns store them in a steel box and charge them in a LiPo Sack.
As he said. Just make sure it's not an air tight steel box otherwise the expanding gases make it a bomb. And buy a QUALITY lipo sack such as these: http://liposack.com/. The good ones work, the cheap ones do not. There's plenty of videos out there comparing them. A quality lipo sack will completely contain the fire.
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Old Sep 19, 2012, 10:08 AM
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lancer525 "What other alternatives are viable for use in electric park jet type foam planes?"

For that type of plane, really none.

I use ONLY the "A123" 2300mAh cells in my planes and chose not to design and fly planes that require a Li-Poly battery.

I'm just very, very weird in that one, and most of the replies you'll get will tell you to just go ahead and use Li-Poly batteries with care and caution.

For the type of plane you described, Li-Poly batteries are the only viable solution.
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Old Sep 21, 2012, 12:11 AM
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Originally Posted by ggcrandall1 View Post
Then I presume you don't travel in airplanes or drive a car.
Or use a mobile, phone, laptop or pretty much any other piece of battery powered electronics.
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Old Sep 21, 2012, 04:34 PM
A man with too many toys
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Originally Posted by lancer525 View Post
All the posts, videos, and information all over the internet about LiPo explosions and fires really make me nervous.

What other alternatives are viable for use in electric park jet type foam planes?
All your mobile devices have LiPo batteries and they have been used in laptop computers many years before that. As long as you use LiPo batteries according to manufacturer instructions they are safe.

I tried LiFePO4 batteries for a while but they were just too heavy and low voltage to give me good performance. I have been using LiPo every since they hit the market and have never had a fire or any problem like that. They definitely five the best performance. Give them a try.


.
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Old Sep 22, 2012, 11:01 AM
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Old Sep 22, 2012, 11:41 AM
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Quote:
Originally Posted by lancer525 View Post
LiPos are out of the question. The potential for incendiary results is too high a risk for me to take.

There must be other alternatives that are suitable, even if there is a minor weight penalty.
One alternative is for you to sit and watch others fly using lipos.
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Old Sep 22, 2012, 03:28 PM
"Comin down Fast"
South East Pennsylvania
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Li-poly battery packs have brought electric powered RC models to their highest performance levels. My choice is to responsibly continue flying my models with this current technology.
If your concern is mostly about your home and family safety, You can feel some relief knowing that Li-poly batteries haven't made it to the top 10 list of possible fire risks.

http://www.google.com/url?sa=t&rct=j...HNwXLrl5cp3Zig
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