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Old 08-07-2008, 06:41 PM   #1201
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make sure there are enough of those go fast ice cream bars to get me a 9.9 lap
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Old 08-07-2008, 07:05 PM   #1202
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I heard a rumor that LiPo warming won't be allowed? Is that true? If so, how will it be enforced?
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Old 08-07-2008, 07:20 PM   #1203
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I just read the rule book and it says the only lipo warming that is legal is to stick it down your pants........the temp will be checked in tech......if it exceeds 98.6 deg's you will not be allowed to run.
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Old 08-07-2008, 07:23 PM   #1204
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^^^^^^^^ THAT WAS A JOKE^^^^^^^^^^^

I will check on it syndrome.
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Old 08-07-2008, 07:23 PM   #1205
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It was actually this guys daughter.. http://www.rctech.net/forum/showthread.php?t=121907 Charlie is one awsome painter thats for sure.. Seems like he passed some talent on to his daughter
That's right it was Charlie's kid!!! I should have kept the body - maybe someday I'd have a famous painter's 1st edition.
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Old 08-07-2008, 08:44 PM   #1206
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^^^^^^^^ THAT WAS A JOKE^^^^^^^^^^^

I will check on it syndrome.
Thanks Josh. The reason I ask is because if warmers are disallowed, but the batteries aren't teched for temp, people are surely going to charge at 12A to get heat in them. That's WAY more dangerous and detrimental than stuffing it down your shorts an hour before your race.

It's a little bit of a bummer that the info is coming out now. That's one of the things that helps LiPo be more comparable to NiMH in low-amp racing.
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Old 08-07-2008, 09:06 PM   #1207
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Thanks Josh. The reason I ask is because if warmers are disallowed, but the batteries aren't teched for temp, people are surely going to charge at 12A to get heat in them. That's WAY more dangerous and detrimental than stuffing it down your shorts an hour before your race.

It's a little bit of a bummer that the info is coming out now. That's one of the things that helps LiPo be more comparable to NiMH in low-amp racing.
If there is a temp rule on lipo shouldn't there be a temp rule on nimh? Just saying :P

The only reason I say this is.. It seems the same things that make lipo dangerous are the same things that make nimh dangerous..
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Old 08-07-2008, 09:11 PM   #1208
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I heard a rumor that LiPo warming won't be allowed? Is that true? If so, how will it be enforced?
That is a good idea.
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Old 08-07-2008, 09:57 PM   #1209
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does anyone know if actually they are going to have a rule on the lipo temp
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Old 08-07-2008, 10:13 PM   #1210
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I thought warm lipos are bad!
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Old 08-07-2008, 10:15 PM   #1211
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I thought warm lipos are bad!
Nope, they're fast. You can warm a LiPo to around 130F with no ill-effects, and gain some respectable voltage.
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Old 08-07-2008, 10:15 PM   #1212
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Is lipo being allowed for World GT?
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Old 08-07-2008, 10:25 PM   #1213
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Is lipo being allowed for World GT?
No, 4 cell.
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Old 08-07-2008, 10:30 PM   #1214
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Thanks Josh. The reason I ask is because if warmers are disallowed, but the batteries aren't teched for temp, people are surely going to charge at 12A to get heat in them. That's WAY more dangerous and detrimental than stuffing it down your shorts an hour before your race.

It's a little bit of a bummer that the info is coming out now. That's one of the things that helps LiPo be more comparable to NiMH in low-amp racing.
I have charged a lipo at 12 amps (purely experimental, in a bunker, etc). At the end of the charge the pack was actually cooler than when it went on. The GFX which is capable of charging at 12 amps reduces the amperage as the charge nears completion. This keeps the pack cool for almost the whole charge. If the pack is creating heat while charging, there is something wrong. Heat is created only when you cannot cram any more electrons into the pack and you keep charging it. Because the cut-off is 8.44v, it never hits that point.

Heating the pack with a heating pad will have the same effect as heating it through charging, and it is safer-er. - But don't quote me on that, you burn your face off, it's your fault.
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Old 08-07-2008, 11:09 PM   #1215
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I have charged a lipo at 12 amps (purely experimental, in a bunker, etc). At the end of the charge the pack was actually cooler than when it went on. The GFX which is capable of charging at 12 amps reduces the amperage as the charge nears completion. This keeps the pack cool for almost the whole charge. If the pack is creating heat while charging, there is something wrong. Heat is created only when you cannot cram any more electrons into the pack and you keep charging it. Because the cut-off is 8.44v, it never hits that point.

Heating the pack with a heating pad will have the same effect as heating it through charging, and it is safer-er. - But don't quote me on that, you burn your face off, it's your fault.
Now that you mention it, perhaps they were getting heat in the pack by discharging it at 35A and then charging it right back up at 12A, or something. Regardless, if the rule is in place, I hope it's enforced in tech. I could see people getting packs too hot trying to keep them warm through tech before their race. I can see why you'd ban heating, to avoid potential issues.
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