esc probs

[adam_j]

can some one please help me. the problem is i`ve melted 2 escs in 2 months.

the 1st was a futaba mc330cr rip off 13t motor limit with venom fire ball 15x2 motor.

the second was a leopard 12t limit with the same motor.

both of these escs melted in my f102.

what am i doing wrong?

am i running it too fast?, are the motors or escs just no good?

some advice on a reliable, affordable, fast motor and esc combo would be very appreciated

[minijosh]

Well it seems that your motors are easily in the limits of the esc. I'm going to say that you are either under gearing your car badly enough to heat up the motor and kill the esc. What do the brushes and comm look like in the motors? How free is your rear axle? You should have plenty air going to the esc since it's a F102 but do the esc's have heat sinks and are they on them? Did you solder the resistors to the motors? Do the esc's have reverse? If they do, they you have to use those resistors or you'll blow the esc. That might be your problem.

[terry.sc]

In the f102 its impossible to gear a 15 turn motor to run properly unless you are constantly running at high speed. Stopping and starting with a 15 turn motor in will draw huge amounts of current, lots more than a touring car with more appropriate gearing would. The lowest wind motor I have run in mine was a 17 turn, but could not gear that low enough to stop it overheating. I was running a 10 tooth pinion and it was still overbgeared. A 27 turn stock or 19 turn super stock would do fine, remember to fit a smaller pinion than standard as well. A 27 turn stock geared correctly would be faster than a cheap 15 turn thats way overgeared as the 15 turn would never spin fast enough to get into its power band, so it just draws loads of current which cooks everything else including the ESC.

[adam_j]

thanks for the replies guys, all the escs were reversible and i didn`t use resistors so this could be my problem.

any advice on resistors and fitting them?

[minijosh]

You just solder them on the motor between the opposite end of where you have the connectors at. I've seen motors that come with 3 resistors so I think there might be a certain number per motor. Just read what the company online says about their motors.

[DJTheo]

Resistors[?] You mean capacitors, right?

Cheers