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10-02-2012, 02:52 PM | #1 |
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I am: Jamie
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Overheating Motor in E-10 Drift - Help?
Hi all - I have an E-10 Drift with an overheating problem. Essentially I'm now running a 21d Venom Fireball motor powered by a WinMax 5200mAH 7.4V LiPo.
With these upgrades, the car runs fast as hell...I can steer it into a drift while running at top speed down the road with the rubber tires on it. Problem is, is that the motor gets hot enough to melt the solder on the positive terminal. I've just put on a heatsink and fan combo, with the fan blowing onto the brush and power leads. I was also having issues with the spur gear grinding, and then having the gears set too tight, and fine tweaking back and forth. Today's run with the heatsink in place, and the gears set (I think) properly, the car was running fantastic; no grinding and it didn't seem to be too tight, and I got to run for about three-four minutes. Then I noticed that when I was drifting with full throttle, and taking off, it was making a grinding sound again. I brought it back to where I was, when it coasted to a stop with the motor lead off again. It seems that since I went to the LiPo, I've had one good run where I've used the car longer than five minutes before something lets go, or burns out, etc... I am doing something stupid here, in my ignorance? Or is there a simple solution that I'm overlooking? I guess failing that, I will go back to my NiMH battery and see if it runs cooler (and slower). Thanks for any help or insight you can impart. Jamie |
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10-02-2012, 04:58 PM | #2 |
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I am: Jamie
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Re: Overheating Motor in E-10 Drift - Help?
Further update...I was looking around online, and found somebody's guide to gear mesh clearance, and using a piece of paper to set the spacing; so I did that. I put my NiMH battry in, changed the ESC mode to NiMH and taped my cellphone to the roof, running a speedo app, so I could check the top speed. Ran it back a forth for a minute or two, and got a speed of 34km/h. Motor was fairly hot, but less so than when running the LiPo.
Changed it out for the LiPo, changed the ESC mode accordingly, and went down the street, although no nearly as fast as I would have thought. Heading back towards me, the motor stops and I see smoke from under the car. I pick it up and have a look, and although the positive lead stayed on, the copper brush lead is burned through and the negative lead comes off. This is stupid, and obviously I'm doing something stupid here. I guess the smart thing would be to give up on this car before I sink any more money into this pit. Sorry for my frustration...If somebody out there has any suggestions, I would love to hear them! Jamie |
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10-12-2012, 09:59 PM | #3 |
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Re: Overheating Motor in E-10 Drift - Help?
Correct me if im wrong...i dont own the car but from what i read on amainhobbies info on the e10 drift...is that the ESC does not say it is LIPO compatible..that is most likely your problem.
the sprint 2 flux clearly states the esc is lipo capable. alex. |
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10-13-2012, 08:26 AM | #4 |
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Re: Overheating Motor in E-10 Drift - Help?
I have built and run a couple of E10 cars. Still have one that works well, and longer than 5 minutes.
First, it's an entry car. It runs best on a 35t motor, using stock gearing, and actual drift hard tires. That's where it's happy. Slow and sliding. Adding high traction tires and fast motors takes this car over it's expected limit. Second, If you move up to a faster motor, and rubber tires, you will make a bunch of heat in that car. THEre's a couple of reasons for this. 1. The car has tons of slop all over it, the dogbones are loose, diff parts loose, wheel bearings, etc etc, and all that makes the car draggy and drag in the drivetrain makes motor heat. 2. Many people I have seen (including myself) have over tightened the wheel screws to hold the wheels on, and the result is binding wheel bearings. Even slightly binding at all will make motor heat. It has to work that much harder just to move the car, and as you know, Lipo will move it!! Binding bearings or not! So the motor takes the crap from the problem. 3. gearing: I had tons of problems with my motors slipping out of mesh on the spur gears. And after 10 spur gears and a few years later I custom made a 32pitch complete conversion to get away from the 0.6 mod gears. (I hope that's the gears you are using?! ) I'll sum it up: The E10 I have now uses 32pitch gears, spur and pinion, modified on a hot racing spur gear center section, rebolted to a traxxas jato spur gear. Then the mesh was set, and I drilled a tiny hole down through the motor mount slide and put in a new screw to keep the slide from actually sliding. It's in perfect mesh forever now. NIce. I moved up to a 12t Losi Brushed SC truck motor. The standard Traxxas 12t truck motor will be perfect also. It's a 550 size can, more torque, and nice speed. Cheap, tough. Put a fan on it like you did already. Way longer durability than a 540 venom size or 540 HPI motor. THis car has a lot of drivetrain drag at the best of days, and a long can motor helps a bunch. I had my E10 set up for rally once. High grip rally blocks, brushless castle 4600 combo, lipo, etc etc, and it went through drivetrain parts in 2 minutes. The car is not made tough enough for that sort of running. My super long lasting setup is the brushed 12t 550 can motor and gearing update, and nice slick drift tires. That's it. The car is a fantastic and speedy drifter, and the driveline lasts forever this way. I tried sedan sticky tires, and blew a rear diff gear. Back to drift. Hope my experience helps you decide on some stuff. Cool car if you set it up for long life. I like mine now.
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so.. up is down when the cockpit window is facing me.... got to remember that next time |
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10-15-2012, 11:57 AM | #5 |
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Re: Overheating Motor in E-10 Drift - Help?
Thanks for the responses and detailed ideas for future customizations!
I took my set up to Ideal Hobbies (where I got the motor) to show them what had happened and to ask for advice. So the young guy comes over, looks at it and says, "that pinion is HUGE!" I told him it was on the original motor, and he explained that with the LiPo and that motor, the gearing was too steep for the motor. With your explanation, Generis, it makes sense that the tall gearing and the sloppy drive-train/suspension makes the motor work extra hard, and the LiPo has no problem feeding the extra juice to it until it overheats. They looked up the stock size pinion (23 tooth 48 pitch) and I bought that, and they gave me a replacement motor for $15 (instead of the regular $25). The car is assembled and ready to test out...if the road ever dries up. I'll let you guys know how it turns out. Oh, and Alex; The ESC has modes for LiPo, NiMH/NiCD, and LiFe. Good thought, though! Jamie |
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10-17-2012, 04:47 PM | #6 |
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Re: Overheating Motor in E-10 Drift - Help?
Ok, so I finally had a chance to try this out. Car ran well, and had nice zip, although nowhere as crazy as with the other gear. I went up and down the road a few times, did some donuts, etc. Then, blew the brand new spur gear. On the bright side, the motor was fairly cool to the touch.
So, it sounds like I'll look into an upgrade similar to what you have in your set-up, Generis. Maybe then I can run this car half decently. I'll just have to stop trying to beat my brother's Traxxas Stampede truck! |
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10-17-2012, 04:58 PM | #7 |
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Re: Overheating Motor in E-10 Drift - Help?
If you want to really go faster then I'd suggest you just buy a better car that's designed for a brushless system and use the E10 as a drifter, just my 2c. I have a couple of TT-01's which are similar and must have upgrades for me were aluminum drive shaft and cups, oil shocks, full bearing kit, aluminum steering upgrade and universal drive shafts but even with all that, it doesn't compare with even the TB02.
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Helicopters: Walkera(10?), Esky(3), Blade(5), Align(7), Miniature Aircraft(2), Hirobo(2), Mikado(2), Century(3), Thunder Tiger(4), Gaui (5). Trucks/Cars: Tamiya(8 ), Traxxas(6), HPI(1), Losi(2), Ofna(2), Thunder Tiger(2), Hot Bodies(1), Axial (1). Boats: 4 Snowcat: 1 Kyosho Blizzard (electric) Snowmobiles: 2 x Polaris (toy grade), art attack electric |
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10-17-2012, 06:01 PM | #8 |
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Re: Overheating Motor in E-10 Drift - Help?
I'm figuring that out now...Anyway, I see there is an aluminum spur gear upgrade I can get, so I think I'll do that. Then, keep the speed down and learn how to drift controllably.
Thanks for the help, guys! |
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