|
| LinkBack | Thread Tools | Display Modes |
06-07-2011, 09:46 AM | #1 |
Rock Stacker Join Date: May 2011 Location: River Falls
Posts: 79
| Battery question...yes, I read the battery thread...twice...
Hi all - On my first build MS-DANA, I'd previously done AAA's for power, mounted a double holder on each side of my DP torsion chassis. I really liked the set-up - good power (same 4.8v as stock), VERY long run times, VERY short recharge times...just didn't really like the look of AAA batteries hanging out on the sides! Not that MS-DANA is scale by any means, I just thought it looked funny. Plus y'all rave about LiPo run times, power, etc... So I borrowed one of my son's batteries from his Mini Super Cub. The battery is 7.4v 300mAh LiPo. Wheel speed is waaaaaay too fast (my Losi took off...I sure hope it comes back...), and throttle response is very twitchy - low-end throttle control is really tough now. Couple questions: Is there a lower volt LiPo that's still 2s? I'm pretty new to RC crawlers, LiPo, etc...so if I can find one that is more in the 4-5v range I'd be happy. I want crawl speed, not race speed. Plus I'd like the extra benefit of the LVC. I've searched Google and it seems everything is either 1s or 7.4v. Would changing the spur gear to a higher tooth count help? I'd be okay with the 7.4v if I could get back to crawl speeds. Ebay has a 56 tooth aluminum: http://cgi.ebay.com/Losi-Micro-Crawl...item43a793d214 Thanks, Mike |
Sponsored Links | |
06-07-2011, 10:04 AM | #2 |
Scale Detail Engineering Join Date: Apr 2010 Location: Turtle Island
Posts: 5,573
|
No, all 2s lipo's are 7.4v and all 1s lipo's are 3.2v. About all you can do is order one of Getbent's Predator motors, it's really your best option. I'm not sure about pinions. |
06-07-2011, 10:06 AM | #3 |
Rock Stacker Join Date: May 2011 Location: River Falls
Posts: 79
| I've been thinking about Getbent's motors...I've read they're hand-wound, better than stock...but are they slower?
|
06-07-2011, 10:06 AM | #4 |
Rock Stacker Join Date: May 2011 Location: River Falls
Posts: 79
|
Oh - thanks for the clarification on the 1s/2s thing! Mike |
06-07-2011, 10:09 AM | #5 |
Scale Detail Engineering Join Date: Apr 2010 Location: Turtle Island
Posts: 5,573
|
I switched from the stock 7.2v nimh to a 7.4v lipo and didn't like the speed. So then I bought a few 1s 3.2v, good speed but no torque... So then, after Murderface talked them up, I bought one of Getbents first 80t Predator motors... With the 7.4v lipo, it's perfect! You could even get the 90t if you really want it slow. So yes, both Predator motors are slower then the stock. |
06-07-2011, 10:14 AM | #6 |
Rock Stacker Join Date: May 2011 Location: River Falls
Posts: 79
|
Cool - that's exactly what I wanted to know. I'll contact Getbent and get on the waiting list. Thanks johnnyh66! Mike |
06-07-2011, 10:19 AM | #7 |
Rock Crawler Join Date: Feb 2009 Location: Milwaukee
Posts: 609
|
I use 2 cell 7.4v & works awesome, Although I use a DX3R & I never had a problem W/control at super slow speeds. Stock motor & G-bent's motor's. I think Getbent's motor's are huge improvement & recommend them highly. |
06-07-2011, 10:47 AM | #8 |
Rock Stacker Join Date: May 2011 Location: River Falls
Posts: 79
|
Yeah, I'm sure the DX3R would be better than the stock...but I'm actually pretty impressed with the stock controller (maybe because I don't know any better!). Already contacted Getbent and got a reply! Mike |
06-07-2011, 12:25 PM | #9 |
Quarry Creeper Join Date: May 2011 Location: OC
Posts: 214
| What is his waiting time like? I may have to get on that too. |
06-07-2011, 02:32 PM | #10 |
Quarry Creeper Join Date: May 2011 Location: OC
Posts: 214
|
So, since we're on the subject of batteries, does the stock NiMH battery die out? I've had this stupid battery plugged in for 3 hours and it hasn't gotten warm or anything. It's seems like it isn't charging at all anymore. Any ideas guys? Time for a battery & charger upgrade?
|
06-07-2011, 03:12 PM | #11 |
Rock Stacker Join Date: May 2011 Location: River Falls
Posts: 79
| |
06-07-2011, 03:13 PM | #12 | |
Scale Detail Engineering Join Date: Apr 2010 Location: Turtle Island
Posts: 5,573
| Quote:
| |
06-07-2011, 04:08 PM | #13 |
I wanna be Dave Join Date: Feb 2007 Location: South FL
Posts: 3,349
|
I agree with the rest. the getbent motor sounds like what you are looking for. as far as lower volt 2S lipo there ARE C ratings for Lipo batteries and the higher the # the more instant "punch" it has. I think a very low C lipo might be ok. For example a 30C 350mah 2S has the same power and capacity as a 15C 350mah 2S. but the 30C has more "punch" You will probly be happy with the motor but your next choices would be trying a bigger spur. or bigger tires to change the final drive and offer more traction. |
06-07-2011, 04:47 PM | #14 | |
Quarry Creeper Join Date: May 2011 Location: OC
Posts: 214
| Quote:
I didn't know about that little quirk with the Trekker/Micro. | |
06-07-2011, 07:44 PM | #15 | |
Rock Stacker Join Date: May 2011 Location: River Falls
Posts: 79
| Quote:
Cool - thanks for the additional info on the C ratings! I'm sure I'll be happy with getbent's motor. And I've been thinking of the miclows, I think bigger tires might make my build look better. Mike | |
| |