Hyper TT 4wd 1/10th Truggy Thread
#2356
Tech Elite
iTrader: (121)
The problem lies at the input caps. If you have a higher resistance battery under heavy load there is more ripple on the input voltage and the caps will overheat. You can minimize this by gearing down a bit and monitoring the ESC temp. My first ESC died and had never seen 120F.
Wouldn't a higher C rating make the ESC run hotter? Or do low C ratings make the ESC work harder to pull current from the battery?
Maybe it's that with a higher C rating, the ESC has more power on tap from the battery and doesn't have to 'pull' as hard on the battery.
Maybe it's that with a higher C rating, the ESC has more power on tap from the battery and doesn't have to 'pull' as hard on the battery.
#2357
Tech Adept
There is something called "ripple current".Here's is a quote from Castle's email (I asked about Mamba Max before about 2 years)
"Too low of capacity and you can damage the ESC from ripple current (big voltage swings going into the ESC)."
"When the batteries cannot handle the current the system is trying to draw it induces ripple current. Ripple current causes more ESCs to fail than anything else. This phenomenon takes place when the ESC is switching on and off thousands of times per second. The batteries obviously cannot do that so the capacitors store a charge to get the ESC through this, and smooth the current and voltage out. If the batteries cannot provide enough voltage/current to keep the capacitors charged, the caps keep trying to dump but there's nothing in them...they get hot, and if they get hot enough the electrolytic fluid inside boils and the cap fails. When this happens your ESC is open to those huge current swings and it'll go up in smoke. "
You must have a battery than can give more amps than your motor is pulling.Otherwise your esc will fail.
"Too low of capacity and you can damage the ESC from ripple current (big voltage swings going into the ESC)."
"When the batteries cannot handle the current the system is trying to draw it induces ripple current. Ripple current causes more ESCs to fail than anything else. This phenomenon takes place when the ESC is switching on and off thousands of times per second. The batteries obviously cannot do that so the capacitors store a charge to get the ESC through this, and smooth the current and voltage out. If the batteries cannot provide enough voltage/current to keep the capacitors charged, the caps keep trying to dump but there's nothing in them...they get hot, and if they get hot enough the electrolytic fluid inside boils and the cap fails. When this happens your ESC is open to those huge current swings and it'll go up in smoke. "
You must have a battery than can give more amps than your motor is pulling.Otherwise your esc will fail.
#2358
If you have a video fo your OFNA ride on Youtube please send me the link so I can review and maybe post it on our OFNAfan.com website. We wanna have bashers,crashers and racers in their OFNA's tearing it up. Bring it, Titans, DM-1's, GTP's, Dominators, Pirates or even old school Colts if you got a vid send it to me at [email protected].
Last edited by -R2-; 03-02-2011 at 11:42 AM.
#2359
Tech Master
iTrader: (17)
Regarding batteries, I was informed that the C rating is pretty important but the discharge rate total (Mah x c) is really what you're looking for.
I only have 20C lipos for the Savage Flux but they're 8000Mah (160 amp discharge) and its been going for over a year now. So technically 20C lipo's will do the job if the discharge rate is ample. Yes 25, 30 or even 40C batteries would be even better but I'm just saying thats not the whole picture.
I only have 20C lipos for the Savage Flux but they're 8000Mah (160 amp discharge) and its been going for over a year now. So technically 20C lipo's will do the job if the discharge rate is ample. Yes 25, 30 or even 40C batteries would be even better but I'm just saying thats not the whole picture.
#2360
So Im thinkin the verdict is either the sct 3800 or the dynamite 3300....buyin it this weekend no matter what....I have two 4000mah 25c lipos will these be enough or do I have to goto 40C????? also if anyone can reccommend a less expensive servo that will be good...I would appreciate it
#2362
economy- EXI D226F from hobbypartz $15 180oz/ .15sec
good- Traxxas 2075 $20-25 on ebay 125oz/ .19 or .2sec ???
better- Savox SC-0251 $40 222oz/ .18sec
best- Savox SC-1256TG $80 277oz/ .15sec
For the battery.....if you go with the Castle SCT a minimum of 4400mah 25c
I have some 5200 30C Turnigy LIPO's from hobbyking and they seem to be working very well
#2363
Tech Apprentice
iTrader: (3)
I have the Savox 1258, it is a great servo for this truck. real fast and torquey. They have a $20 coupon deal right now make it under $50 (savox direct) Coreless, digital, Ti gears and AL case
Speed(@6.0V sec/60): .08
Torque(@6.0V oz-in): 166.6
Gear: Titanium & Aluminum
Bearing: 2BB
Case: Aluminum
25 Tooth Spline
http://www.savoxusa.com/Savox_SC1258...avsc1258tg.htm
Speed(@6.0V sec/60): .08
Torque(@6.0V oz-in): 166.6
Gear: Titanium & Aluminum
Bearing: 2BB
Case: Aluminum
25 Tooth Spline
http://www.savoxusa.com/Savox_SC1258...avsc1258tg.htm
#2364
A few servo choices...any good servo over 120oz would be good...the speed is up to you under .20 would be best
economy- EXI D226F from hobbypartz $15 180oz/ .15sec
good- Traxxas 2075 $20-25 on ebay 125oz/ .19 or .2sec ???
better- Savox SC-0251 $40 222oz/ .18sec
best- Savox SC-1256TG $80 277oz/ .15sec
For the battery.....if you go with the Castle SCT a minimum of 4400mah 25c
I have some 5200 30C Turnigy LIPO's from hobbyking and they seem to be working very well
economy- EXI D226F from hobbypartz $15 180oz/ .15sec
good- Traxxas 2075 $20-25 on ebay 125oz/ .19 or .2sec ???
better- Savox SC-0251 $40 222oz/ .18sec
best- Savox SC-1256TG $80 277oz/ .15sec
For the battery.....if you go with the Castle SCT a minimum of 4400mah 25c
I have some 5200 30C Turnigy LIPO's from hobbyking and they seem to be working very well
#2365
Tech Elite
iTrader: (7)
What is a general track shock oil setup for this thing? My truck seems to slap on even some small jumps. I bought my truck secondhand and I'm not sure what the guy had in the shocks, but it feels like its in the 30 range. I'm running the orange springs up front and blue in the rear.
Is there anything I can do to get some stiffer damping? I know it's not going to be plush like a 1/8 buggy and it is heavier than the average 1/10 electric buggy. Do shocks from any other vehicles work on this?
Is there anything I can do to get some stiffer damping? I know it's not going to be plush like a 1/8 buggy and it is heavier than the average 1/10 electric buggy. Do shocks from any other vehicles work on this?
#2366
What is a general track shock oil setup for this thing? My truck seems to slap on even some small jumps. I bought my truck secondhand and I'm not sure what the guy had in the shocks, but it feels like its in the 30 range. I'm running the orange springs up front and blue in the rear.
Is there anything I can do to get some stiffer damping? I know it's not going to be plush like a 1/8 buggy and it is heavier than the average 1/10 electric buggy. Do shocks from any other vehicles work on this?
Is there anything I can do to get some stiffer damping? I know it's not going to be plush like a 1/8 buggy and it is heavier than the average 1/10 electric buggy. Do shocks from any other vehicles work on this?
Last edited by scooterman19; 03-03-2011 at 02:09 AM.
#2367
Tech Addict
iTrader: (1)
What is a general track shock oil setup for this thing? My truck seems to slap on even some small jumps. I bought my truck secondhand and I'm not sure what the guy had in the shocks, but it feels like its in the 30 range. I'm running the orange springs up front and blue in the rear.
Is there anything I can do to get some stiffer damping? I know it's not going to be plush like a 1/8 buggy and it is heavier than the average 1/10 electric buggy. Do shocks from any other vehicles work on this?
Is there anything I can do to get some stiffer damping? I know it's not going to be plush like a 1/8 buggy and it is heavier than the average 1/10 electric buggy. Do shocks from any other vehicles work on this?
#2369
yes I have the SCT in my 10TT...so far so good, racing season hasnt started yet...but for our track (tight, technical, low traction) it is working well.
I have the stock spur with a 13T pinion now, running cool, but a little harsh on the bottom end....I am going to try a 14T on my next practice session.
I also need to get my Castle Link running and try to tone it down a little on the bottom end...Anyone have recommendation on their SCT settings?
I have the stock spur with a 13T pinion now, running cool, but a little harsh on the bottom end....I am going to try a 14T on my next practice session.
I also need to get my Castle Link running and try to tone it down a little on the bottom end...Anyone have recommendation on their SCT settings?