R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 04-11-2007, 07:49 PM   #1
cbl
Tech Regular
 
cbl's Avatar
 
Join Date: Sep 2006
Posts: 304
Trader Rating: 1 (100%+)
Default New to Lipo technology

I am thinking of using li-po batteries. I have a Team Orion Advantage charger that can charge li-pos.

If I get the Team Orion 3200 lipo, do I still need to buy a balancer?

Can I use my LRP Quantum Competition 2 esc?

Please give all your inputs as I do not know anything about this technology.

I plan to use it on my B4, I do not plan to race, I just want to run for fun.

Thanks.
cbl is offline   Reply With Quote
Old 04-11-2007, 09:49 PM   #2
Tech Legend
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 29,552
Trader Rating: 240 (100%+)
Default

For fun running. I would probably go with this:

Maxamps 6000mah lipo battery pack 7.4V
Apache or Polyquest balancer (heard this are not bad and only $30)
MRC 989 or other lipo capable charger
Liposack or battery bunker
Mamba Max brushless system
OR
get a voltage cutoff device so the battery doesn't go below I believe 6V?

I looked into this for awhile, and was going to do pretty much what I listed above but couldn't run the batteries in the class I would race them in.

I would go with a brushless unit if you can, you would really enjoy the minimal maintenance and the auto lipo cutoff on it as well. Not bad either for $179 for a complete system.

I know that there have been posts about not needing a balancer, but after looking it up and reading various posts of the pros and cons, the cost of the balancers I was advised on was minimal so I figured it could come in handy.

You should get some REALLY long runtime with the 6000mah. If you do the 8000mah they sell, you only need to raise up the post for the battery strap from what I understand. Guys are doing 20+ minute mains with nitros using T4s and the like with brushless and 8000mah lipos.

If you are worried about the fire hazard thing, you could also look into the apogee packs, the ones that are Limn. they have 3800mah packs for $75 I beleive.
__________________
Member - Red River Radio/Control Car Club
< Tekno EB48SL / SCT410.3 | Tekno EB410 x 2 | Yokomo YZ-2 DTM x 2 | LC Racing EMB-1 Buggies and Truggies >
Cain is offline   Reply With Quote
Old 04-11-2007, 10:38 PM   #3
Tech Addict
 
Join Date: Jul 2006
Location: Iowa
Posts: 637
Trader Rating: 9 (100%+)
Default

I've heard/read the Orion/Peak packs are some of the most 'stable' available. They are supposed to be the least likely to explode, leak, burn, etc. I don't know about the Quantum 2, but I'd consider the Sphere Competition as it has the built in cut-off so you don't go too low on voltage and brushless will give you longer run-time.

Also, you might as well go for the 4800 pack. With LiPo you should only need 1 pack, so you might as well have the better pack up front for a minimal additional expense.
glitchy is offline   Reply With Quote
Old 04-12-2007, 08:22 AM   #4
Tech Addict
 
Iceracer's Avatar
 
Join Date: Feb 2006
Location: Canada
Posts: 656
Trader Rating: 1 (100%+)
Default

I just ran my LRP Comp sphere w. Orion 3200 pack last night and I got nearly 20 minutes of flat out run time with a Novak 13.5 brushless. I'm thinking this is a pretty good combo. I went with the sphere comp because the novak esc's didn't have a lipo cutoff. Apparently they are just releasing a new GTB that has lipo cutoff, so you might want to look into that.
Iceracer is offline   Reply With Quote
Old 04-12-2007, 09:15 AM   #5
Tech Adept
 
losiguy69's Avatar
 
Join Date: Jul 2006
Location: canada
Posts: 203
Trader Rating: 9 (100%+)
Default

i have the max amps 4400 lipos in my bj4 and get about 15 minutes of run time with a mamba max 7700, the max amps lipos are great and the customer service is amazing, the packs dont get hot when running or charging

scott
__________________
Team Durango DNX408T
Spektrum DX3R Pro
Tekin T8 ESC 2250 motor
losiguy69 is offline   Reply With Quote
Old 04-12-2007, 09:34 AM   #6
Tech Elite
 
glassdoctor's Avatar
 
Join Date: Aug 2006
Posts: 2,250
Trader Rating: 4 (100%+)
Default

in short... I really don't think you need a balancer for the Orion 3200.... if there is one that works with it.... then it wouldn't hurt to have it but it's not something you need to constantly worry about.

Does this pack even have taps to use for balancing???? If so, then you can simply use a voltmeter to check the voltage of each cell occasionally. If something gets out of balance then you can manually charge the low cell to bring it up....

So.. no... just buy the pack and have fun

(can't believe that came from me.... craps would be proud I think lol)
glassdoctor is offline   Reply With Quote
Old 04-12-2007, 09:46 AM   #7
Tech Addict
 
Iceracer's Avatar
 
Join Date: Feb 2006
Location: Canada
Posts: 656
Trader Rating: 1 (100%+)
Default

Yeah, there is a mini barrell type port for the centre tap between the two cells for balancing on Orion and Peak 3200's. If your charger does single lipo cells, just do them one at a time to balance them if you see them out of balance.

The need for balancing may be overrated. I've got year old 3 cell packs from my planes and they are not out of balance yet. I'm thinking nimh with its shorter lifetime and greater variability between cells suffers more from unequal capacity developing over short use.
Iceracer is offline   Reply With Quote
Old 04-12-2007, 10:05 AM   #8
Tech Elite
 
glassdoctor's Avatar
 
Join Date: Aug 2006
Posts: 2,250
Trader Rating: 4 (100%+)
Default

Yes... imo balancing is not to be overlooked completely, but it's not something you should have to be obsessed with.

If something is not right with a [ack, then it could be out of balance a little on every use. But when the pack is working as it's supposed to(and you verify that it seems to be staying in balance after a few runs)... balance only needs to be checked occasionally, just to catch a problem.

It's like screening for cancer.... catch it before it does any damage.
glassdoctor is offline   Reply With Quote
Old 04-12-2007, 07:46 PM   #9
cbl
Tech Regular
 
cbl's Avatar
 
Join Date: Sep 2006
Posts: 304
Trader Rating: 1 (100%+)
Default

Thanks for your help guys. I would probably get the new LRP brushless system with the vector motor.

Thanks again.
cbl is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
RC Technology Ray Lan Singapore R/C Racers 49 03-14-2007 07:30 PM
whats your guy's input on the new lipo technology rhymster Electric Off-Road 12 05-29-2006 12:44 PM
Battery Technology< when is enough,,enough blownawayig Electric On-Road 18 04-01-2005 12:55 AM
Wow... New Technology! Super Steve Electric On-Road 129 05-03-2004 02:36 PM
Marvel of RC technology Morpheus2be Malaysian R/C Racers 14 11-05-2002 12:31 AM



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 03:50 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net