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09-20-2006, 09:09 PM
| #1 |
| Newbie Join Date: Sep 2006 Location: At the nuthouse!
Posts: 32
|  What size cells?
I was wondering what size battery cells you all are running? How much difference is there in run time from 2/3A to sub-c?
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09-20-2006, 09:14 PM
| #2 |
| I wanna be Dave Join Date: May 2005 Location: Anchorage, Alaska
Posts: 2,048
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Start nosing throught the Electronics forum. This might help. It's a sticky at the top of that forum: http://www.rccrawler.com/forum/showthread.php?t=34048 Basically, a 3800 subC pack is gonna give you lots of runtime. AT LEAST and hour I'd say. 2/3A are usually around 1200-1400mah so your runtime will be about half or so... say around 45 minutes. That's why lots of people use 2/3A on the TLT. 45 minutes is plenty and the weight savings also makes it that much better. |
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09-20-2006, 09:15 PM
| #3 |
| I'm a stupid C U N T! Join Date: Jun 2005 Location: In the Garage!
Posts: 4,307
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i run a 3000mah subc stick on my sw2. and 4200, on my tuber. subc's can handle higher discarge rates and have higher capacities. but they are much larger and heavier. even with 2/3 aa's people are still getting 30-45 min run times
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09-20-2006, 10:33 PM
| #4 |
| 06 Super National Champ   Join Date: Jun 2004 Location: Stark Industries Bar and Grill
Posts: 11,361
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I use batteries that have the capacity and weight my rig needs. I typically don't consider run time when choosing batteries. I saw some Super Class rigs at the Nationals that were running small packs (2/3A and Li-Pos). To me these larger rigs need some weight to perform well. I have high capacity Li-Pos, but don't use them on my rigs...not even the 2.2 crawlers. When placed properly, sub-C packs have enough heft to them to increase performance. No sense in using a lighter battery only to find yourself adding/needing weight to gain performance. Run time isn't an issue unless you plan on crawling all afternoon and is dependent on battery capacity...no matter the physical size of the cell. As Slobin said, Sub-C cells will handle higher discharge/charge rates. I ran each 5 minute course at the Nationals and re-peaked my pack (Fusion 3300) between courses. After each course the pack accepted 580-600mAh. That's with a dual Mamba 25/Revolver system and dual Airtronics 94359Z servos...no RX pack. I crawled my TLT with the Novak Crawler system for an hour and managed to use 1950mAh or so. You could make a run like that on Sub-Cs, Li-Pos, even 2500mAh Energizer AAs. I've used both light (Li-Po, AA, and 2/3A) packs and the heavier Sub-C packs and, for me, the Sub-Cs have the advantage over the smaller, lighter packs. |
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09-20-2006, 10:57 PM
| #5 |
| 2006 2.2 National Champ  Join Date: Dec 2004 Location: Big Bear Lake
Posts: 8,328
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I agree with JIA, the extra weight helps IMO too. I like the weight of the standard stick packs I run. I ran all 3 courses at the Nationals with one battery in each rig, no topping off between courses. I use Venom's 3300 nimh stick packs.
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10-05-2006, 09:45 PM
| #6 | |
| MODERATOR™  Join Date: Jul 2004 Location: Ohio
Posts: 18,928
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Except you can put that weight back into the rig even lower in the tires. | |
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10-05-2006, 09:49 PM
| #7 |
| I wanna be Dave Join Date: Jan 2006 Location: Albuquerque
Posts: 2,206
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That's my thoughts on the subject. I will use the sub-cs if I have to (like now, I'm having problems with my 2/3A cells from maxamps). I don't like how high the sub-Cs put my weight. I suppose I could make some packs to sit on top fo the axles, but I'd rather have it around the tires and I just can't do that with my 2.2s.
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10-05-2006, 10:07 PM
| #8 | |
| 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill
Posts: 11,361
| Quote:
I'm under the knuckles with my weight as it is. ;) I need to weigh my rig and calculate CG both front to rear and vertically. Should be interesting. Remember, I'm referring to Super rigs with the small, light packs. I didn't see enough weight in those rigs to perform the way I like. But I'm odd, I guess.  | |
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10-08-2006, 10:03 AM
| #9 | |
| RCC Addict Join Date: Apr 2006 Location: Brighton
Posts: 1,015
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02-22-2007, 05:36 PM
| #10 |
| I wanna be Dave  Join Date: Feb 2006 Location: Campbell, CA 4 hrs 2Rubicon !
Posts: 2,044
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Good feedback here hmmmm which sub C's or Gp2000's ? 17" super class posti note  |
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02-22-2007, 06:31 PM
| #11 |
| owner, Holmes Hobbies LLC  Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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sub C under the knuckle IMO.
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02-22-2007, 10:52 PM
| #12 |
| I wanna be Dave  Join Date: Oct 2006 Location: Milwaukie OR
Posts: 2,078
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Sub C's are a great cell to run given you have the space. under the knuckle is probably the best spot to put suck a big cell. I have learned after switching to the super class this season, that I want the bigger cells for the runtime. The 4/5A cells work great too, but have only managed to give me a max of 30mins on my clod. Keep it over 2000 Mah and you should be fine
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02-23-2007, 10:37 AM
| #13 | ||
| Quarry Creeper  Join Date: Nov 2005 Location: The Great White North
Posts: 465
| Quote:
Quote:
Hmmm so the National Champs in both super & 2.2 use sub C cells... hmmm maybe time to rethink my AA packs... | ||
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02-23-2007, 10:50 AM
| #14 |
| Quarry Creeper Join Date: Aug 2004 Location: HP lounge
Posts: 289
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I'm running 9 2/3AA cells in my TLT to a 65t lathe, sub c's would be friggin' huge and heavy, lipo too expensive. I do plan to reconfigure my A123 packs and get an extra 2s1p mini pack, I'll try to add it to the same truck somehow......on top of the servo/top links maybe?
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