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08-24-2011, 06:02 PM | #1 |
Quarry Creeper Join Date: Aug 2011 Location: Troy
Posts: 250
| Looking at upgrading to Lipo
Few questions that I havent been able to answer with the search. I believe my charger of choice will be the Thunder AC6, seems to be the one thats decent and doesnt kill my wallet (especially since I just bought an Onyx 200 less than 2 weeks ago). Anyways, my motor/esc set up is: Holmes Hobbies TorqueMaster BR-XL Holmes Hobbies TorqueMaster Pro Handwound 35t. This will be going into an SCX10, no competitions or anything, just backyard driving. Im looking to have a bit of wheel speed, but I realize this is a crawler, not a short course truck. From what I understand, the higher the C rating, the more current can be passed out at one time (IE, higher C rating, better acceleration for lack of a better term). Is that correct? If so, is there a limit to how many C's I want. Is something like 55c absolute overkill? What is the general accepted C level? I think I am going to shoot for 3000mah, good middle ground pack? Im thinking any higher and I'll hit some weight issues. I believe Im going 3s, although I think it looks like the Holmes BR-XL can go up to 6. Is there any reason to go higher? Thanks! |
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08-24-2011, 06:58 PM | #2 |
I wanna be Dave Join Date: Jul 2006 Location: The beautiful Pacific Northwest
Posts: 6,923
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I've found that a 35c battery works well with all but the most power hungry ESC/motors. The BRXL is a great ESC, and a 35t motor is a perfect starting point. A 35t on 3s is perfect for a scaler, but with the BRXL its nice to know you could throw in a 4 or 5 cell lipo and really rip. A 3000mah battery should work well and give you 1 hour + of runtime depending on your trigger finger. Sounds like you are on the right track!
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08-24-2011, 07:17 PM | #3 | |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
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On the mah question, keep in mind a couple things: 1-All your money in a pcak sucks when it dies and you don't have another one (thus, buy 2 smaller packs). 2-The time changing packs gives the electronics a chance to cool off. 3-Smaller packs are easier to fit into any rig. 4-A 35C rated pack is good for most applications I run 45C 3S 1350mah packs in a 2.2 MOA running 35T brushed motors. I have enough in a pack to run 2 5-6 minute courses with lots of loading. | |
08-24-2011, 08:36 PM | #4 |
Pebble Pounder Join Date: Feb 2010 Location: Calgary
Posts: 136
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I believe the spec on the brxl is 80A continuous so if you get a 3000mah pack 80/3=26.6c. I'd go for a 35 or 45c pack. I've got a couple of 3000mah 2s packs for my son's scx10 and like them. They are reasonably light and last long enough for us. |
08-26-2011, 07:37 PM | #5 |
Quarry Creeper Join Date: Aug 2011 Location: Troy
Posts: 250
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Well I went ahead and pulled the trigger on the Lipo's Ended up with: Thunder AC6 Charger 2x Sky Lipo 3000mAh 40c 3s 1x Sky Lipo 3000mAh 40c 5s 3 Lipo Storage/Charge bags and also grabbed 16 rechargeable NimH's for my radio and one more Receiver for the GT3B. Good selection? They didnt have any 35c's, so I figured higher is better than lower. I picked up the 5s for when I want to run higher speeds, and also to eventually drop into my TB-01 and future Wraith kit when its available. Last edited by AG74683; 08-26-2011 at 07:42 PM. |
08-26-2011, 07:49 PM | #6 |
Rock Crawler Join Date: Oct 2010 Location: Abbotsford BC
Posts: 522
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Go gentle on the throttle with the 5s or it's bye-bye gears and driveshafts
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08-26-2011, 07:52 PM | #7 |
Quarry Creeper Join Date: Aug 2011 Location: Troy
Posts: 250
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08-27-2011, 02:25 PM | #8 |
RCC Addict Join Date: Jun 2011 Location: Gilbert, AZ
Posts: 1,634
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Here is the thread I started when making the same decision. A lot of good information in there I thought. To LiPo or not to LiPo I ended up with 2 1300mah 30C sky lipos and I get an easy 30-45 minutes out of each of them. I also got a 2650mah but have yet to run it because I have built a mount for it. I'm guessing it will be around an hour 15-30minutes runtime. I have all stock Honcho RTR elec. I ended up with a Onyx 235 charger which works fine, but doesn't have a storage charge mode. That is one option that would be nice. I just set a battery profile at about 40% and it seems to come out about right. It does have some other nice features though. Last edited by Big Daddy; 08-27-2011 at 03:50 PM. |
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