I think I just fried my 1/18 Mamba 6800 Motor - RC-Monster Forums

BP-Revo · **I think I just fried my 1/18 Mamba 6800 Motor -** 12.30.2006, 12:32 AM

I was running in the snow and had use saran wrap to seal up my chassis. I came in after ~15 minutes (3S 1500mah Lipo's run forever...I think I've gotten like 40 minutes of full throttle before). Anyway...the motor was SO hot that it waws able to melt a pretty large chunk of snow and then boil it into vapor!!!

OOPS!!!

I took it for a run today and left the motor completely exposed. It ran cool (ambient temps ~10* F). It seemed to run fine, but I can't tell until I get some traction. Snow driving with a Mamba 18T mostly involves rally-like driving over ice and flat, packed snow).

So...is my motor fried? It seems ok while driving, but logically I would think it shoul be toast.

PS. Its awesome rallying around on the packed snow...I love the 4 wheel rooster tails...

12.30.2006, 12:59 AM

well, I don't really know about your motor, but i got my 6800 up to 310F:035: . It wont stop cogging now. I think mine is fried....

Bye:018:

BP-Revo · 12.30.2006, 01:08 AM

I think my motor was at like 400...but yea...

BrianG · 12.30.2006, 01:33 AM

Wow, 300+ degrees! :dft002:

You guys are brave!

MetalMan · 12.30.2006, 01:57 AM

If it runs, then it can't really be fried. Most likely the motor went through a loss of power from the rotor de-magnetizing due to excessive heat. But if it runs, it runs!

go4gold · 12.30.2006, 02:42 AM

Yeah what MetalMan said. It' probably fine but even a light overheating in the future may fry it

JOHNNYMAXXIMA · 12.30.2006, 04:49 AM

Castle says that 200* should be the max for these little motors. So i'm thinkin 300-400* may be just a tad on the warm side?

MetalMan · 12.30.2006, 11:16 AM

It is, but BP-Revo needs a temp gun to know hot hot it actually got :027:.

JOHNNYMAXXIMA · 12.30.2006, 02:55 PM

Temp guns are only about $25 right? Where at in So Cal is BP-Revo? Maybe he could stop by your store Metal and you could hook him up with one.:027:

MetalMan · 12.31.2006, 12:39 AM

He lives only like a mile or two from the Hobby People I work at, and he has stopped by. I think I offered him a discount on the $25 Duratrax one, which would bring it down to something like $20, but he didn't seem interested at the time :). He can use mine when we go bashing next week.

BrianG · 12.31.2006, 12:54 AM

Quote:

Originally Posted by MetalMan

He lives only like a mile or two from the Hobby People I work at, and he has stopped by. I think I offered him a discount on the $25 Duratrax one, which would bring it down to something like $20, but he didn't seem interested at the time :). He can use mine when we go bashing next week.

Now that he wants one, you should charge him $30! :p

BP-Revo · 01.01.2007, 03:11 AM

Eh...I'll go by the "If it runs, it runs" rule...the fact that its so fast I can barely control it above 1/2 throttle means I won't notice a drop in power unless its something like a 30% drop lol...

I know the motor was at a REDICULOUS temp...it melted a chunk of snow a little larger than the speed control and then boiled it off all within a second or two. It actually did that to like 10 peices of snow...so I know it was REALLY...REALLY...hot.

Funny thing is though, I was running it the other day. And even though my motor can was too hot to touch for more than a second or so, my rotor was still cool... any thoughts on this?

sjcrss · 09:38 AM

I know the motor was at a REDICULOUS temp...it melted a chunk of snow a little larger than the speed control and then boiled it off all within a second or two. It actually did that to like 10 peices of snow...so I know it was REALLY...REALLY...hot, you know that isn't the smartest thing to do...to check temps........you could have just licked your finger and tested it that way....but to testit with clumps of snow...just wasn't to bright IMO, i think the next tiem I run my truck and i want to test the temp of it, i'll throw a cup of water on it and see if it boils off...........snow turns into water when it melts, also the sudden cold on stuff doesn't help things either......but hopefully the motor is allright, but i think you messed it up by super heating it, and then melting snow on it......and hopefully no water seeped inside any where......best of luck figuring out what is wrong with it......

BP-Revo · 01.01.2007, 02:53 PM

At the temp it was at...I dont think snow was an issue...

coolhandcountry · 01.01.2007, 04:14 PM

If it still works keep running.