R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 09-16-2008, 04:14 PM   #16
Tech Fanatic
 
Join Date: Jan 2008
Location: All Over So. Fla.
Posts: 985
Trader Rating: 1 (100%+)
Default

Just think, if you were running nitro, this won't happen.
The Working Man is offline   Reply With Quote
Old 09-16-2008, 04:19 PM   #17
Tech Master
 
Join Date: Sep 2007
Location: en tu amigas pantalones
Posts: 1,605
Trader Rating: 16 (94%+)
Default

yeah why is this in the nitro forum
BSS07 is offline   Reply With Quote
Old 09-16-2008, 04:44 PM   #18
Tech Adept
 
Join Date: Jul 2008
Location: Lexington, Kentucky
Posts: 152
Trader Rating: 7 (100%+)
Default

Well I put the transmitter pack on the charger. The initial voltage was 8.7 volts on the pack. It charged for about an hour. It seems to charge OK without any fire. I will see if the performance has dropped off.
__________________
Mugen MBX7R Eco
SC5M
Mugen MBX7R Werks B6/2 Pro
Futaba 3PKS
maximuspowell is offline   Reply With Quote
Old 09-16-2008, 05:45 PM   #19
Tech Lord
 
Join Date: Jul 2008
Location: Houston, TX
Posts: 11,530
Trader Rating: 21 (100%+)
Default

The higher quality cells are less impacted by slight overdischarge than less expensive cells. Watch the pac for a couple of cycles so you know its going to be ok and not a prob.

I stored 7 lipos at 50% and was gone out of the country for 11 weeks - every one of them had a badly puffed cell. Two lipos were brand new and had only been charged and then discharged to 50%. Had some 2S and some 3S lipos. I've been using 80% since replacing them and so far had no probs. I won't use 50% again.
Duster_360 is offline   Reply With Quote
Old 09-16-2008, 07:19 PM   #20
Tech Master
 
Turbine_au's Avatar
 
Join Date: Jan 2006
Location: SA
Posts: 1,340
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by BSS07 View Post
yeah why is this in the nitro forum
LiPo receiver packs, LiPo transmitter packs, LiPo starter box packs...

Doesn't specify it was a LiPo power pack.
__________________
It's mine: http://au.youtube.com/watch?v=usYhSWbmx6s
Turbine_au is offline   Reply With Quote
Old 09-16-2008, 07:34 PM   #21
Tech Regular
 
lowey79's Avatar
 
Join Date: Dec 2007
Posts: 356
Default

Quote:
Originally Posted by Turbine_au View Post
LiPo receiver packs, LiPo transmitter packs, LiPo starter box packs...

Doesn't specify it was a LiPo power pack.
+1 I use lipo Rx Packs and it's always handy to learn more about them!
lowey79 is offline   Reply With Quote
Old 09-16-2008, 10:28 PM   #22
Tech Master
 
Z00M's Avatar
 
Join Date: Jun 2004
Location: Perth, Western Australia
Posts: 1,173
Trader Rating: 15 (100%+)
Default

Mine was an RX pack as well.

Gotta love the clowns that forget electricity actually exists in their Nitro cars Maybe they have Nitro powered generators for their receivers!
__________________
My blog: http://mikesrc.wordpress.com
XRAY XB4
## NOSRAM ## XRAY ## KO ##
www.nbhc.com.au - www.teamxray.com
Z00M is offline   Reply With Quote
Old 09-17-2008, 02:58 AM   #23
Tech Master
 
Turbine_au's Avatar
 
Join Date: Jan 2006
Location: SA
Posts: 1,340
Trader Rating: 6 (100%+)
Default

Fit an alternator.
__________________
It's mine: http://au.youtube.com/watch?v=usYhSWbmx6s
Turbine_au is offline   Reply With Quote
Old 09-17-2008, 05:24 AM   #24
Tech Master
 
*Chrominator*'s Avatar
 
Join Date: Feb 2006
Location: Living in a Van down by the river.
Posts: 1,145
Trader Rating: 19 (100%+)
Default

Are you guys storing or leaving them it hot areas ?

Heat kills Lipos, I live in Az. were obviously it's Hot. I store my lipos in a lipo sack in my refrigerator, and transport them to track in a small cooler, with one of those frozen cool packs with a rag in between .

Here's some Info.on the benefits of storing Lipos in cool temps. and at 50-60% .

http://rclovers.com/GetTheMostFromLipo.htm
__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hi my name is Mike, and I'm a Chromeholic, my wheels have been chrome free for over a year, thanks to everyone who made fun of them.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*Chrominator* is offline   Reply With Quote
Old 09-17-2008, 09:16 AM   #25
Tech Lord
 
Join Date: Jul 2008
Location: Houston, TX
Posts: 11,530
Trader Rating: 21 (100%+)
Default

The 7 lipos I lost to storage at 50% were inside the house under AC and never saw temps more than 80F. I store mine at room temp.

With the wide varietry in quality of cells out there, not sure a universal guide is possible. My higher quality lipos (Flightpower, NeuEnergy) behave diff than the less expensive ones (ProTek, Integy, DualSky, Nexus, Vampower, etc).
Duster_360 is offline   Reply With Quote
Old 09-18-2008, 05:40 AM   #26
Tech Fanatic
 
helibrian's Avatar
 
Join Date: Sep 2008
Posts: 801
Default

hey guys,
a little info on lipos if you're interested. As far as temps go, it really caught my eye when I read the guy in Arizona stores his in the fridge. Funny stuff. I hope it's not in the ice maker. Crushed or cubed? No but really, the freezer may be too cold, the fridge is probably fine though. I think the average fridge runs about 40-45 degrees don't they?
Anyway the accepted lipo temp range for charging is 32-113. For discharging, 32-140.
As far as storage goes, 40-70 is ideal.
Voltage on a stored lipo should be, 3.8-3.9v per cell.
Low voltage should be no less than 3 volts per cell. If you accidentally run the batt down below that you can bring it back but I'm hesitant to suggest it here because it can occasionally lead to disaster.
Peak voltage is gonna be 4.2v per cell.
And nominal is gonna be 3.7v per cell.

If you have a puffed lipo you're supposed to run it completely dead and toss it in the trash. Personally, if I have a pack with one puffed or bad cell, I just remove that cell and save the rest of the pack. I've got several 2 cell packs that used to be 3 cell packs and of course you can put packs together. All this though, can be a little risky because of the way lipo cells are designed. They are pretty fragile and can internally short out easily, so you have to be very very careful when assembling/dis-assembling a pack. In fact I don't recommend it unless you're heavily insured.
helibrian is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
IB4600 WinnipegRacer Electric On-Road 110 12-25-2008 03:45 PM
much more power supply,triton 2 charger, equinox lipo balancer twistedone R/C Items: For Sale/Trade 5 03-05-2008 10:14 PM
bl and lipo whats the problem rotorboss Australian Racing 56 07-01-2007 09:12 AM
Fastlap Hobbies SLO, racing schedule tunnelhead Racing Forum 554 02-10-2007 09:48 PM
4000mah car Lipo batteries $80 (same size as a 6cell pack) aussiebuddha Australia For Sale/Trade 5 01-06-2007 02:18 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 06:36 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net