Electric Tourers... Getting it smooth and silent

[NMT_RACER_BOY]

How come Some TC3s are super loud even with the right gear mesh while some Xrays are silent-sniper style?

How would you get the cars (TC3s) to work more efficent and quiter?

Where exacly does the sounds come from?
(gears? outdrives? bearings?)

thanks guys...

[k_sw31]

Even if you have a perfect gear mesh, if the gears are damaged at all there will be a lot of noise resulting from it.

Sources of noise can be binding, vibrations (ie worn out bushing/damaged bearing) and poor mesh/damaged gears.

It also can be wheel wobble, etc.

[trw]

k_sw31 pretty much nailed it. yea..usually it something binding or vibrating too much...or something loose. Also could be the motor generating the noise naturally.

[Animeboy123]

ya i have noticed that the motor makes most of the noise. I can take out my motor and roll my chassis (TC3) down the drive way and it will be vertually silent.

[kn7671]

Yup, all as to do with the motor and gear mesh usually.

For the TC3, everything is practically directly connected to the motor and then to each other, while belt driven cars don't have gear differentials and such to make additional noise under acceleration.

It is true that small rough spots on the spur or pinion gear will also cause additional noise. One other aspect of noise is the bearings. Some well worn bearings will create more noise, and bushing cars are even louder, while new bearings or better bearing may be quieter.

[TEM]

Are you using 48pitch spur/pinion? If you are, theres most of the noise right there! Go 64 pitch and it will be quieter! Shaft cars are louder too cause of the beveled gears on the shaft to diff connection. You can very carefully shimm it on some cars to make it a little better. Belts are indeed quieter.

[FrankW]

Word to the wise: If you want a truely smooth touring car (or any R/C car for that matter), balance your wheels/tires!! These little wheels are rotating at 5000+ rpms. If they're out of balance you will loose a lot of available power. Full sized car wheels and tires are balanced, so why not R/C car wheels and tires? I use my Topflight magnetic prop balancer.

-Frank