Advices to build a competitive RC Car. Part 3: Others advices

In this last part I will show you some other important features, as centrer of gravitiy or recomended wheels

- Center of gravity

This point is very important.

The location of the center of gravity has strong affects in car's performance.

In the RC cars always the most heavy part is de battery. It's position is very important, and always you should put it as down as possible.

The weight distribution between both axles is very important too. In the real streets cars the theory perfect weight distribution is 50% in each axle.

But my own experiende the perfect weight distribution for Lego Rc Cars is between 45-55 and 40-60

Calculate the weight distrubution is very easy, for do it you only need a scales.

1- With the car in horozontal possition, put only the front axle in the scales, that weight is the front axle weight (F), after put the rear axle, this is the rear axle weight (R).

2- For calculate the distribution you should use this formula:

 

- Recommended wheels

To have as much grip as possible, several things are important:

- Soft tyres
- Tyres as wide as possible

Also for reduce the transmission torque is recommended use middle or little diameter wheels.

Are very recomended:

- 43.2 x 22 ZR

 

- 56 x 28 ZR

- 62.4 x 20 S, this wheel are not the best, but it's good and very common

- 68.8 x 36 ZR

All this wheels are common and cheap.

- Fenders

It is very recommended to use a fenders.

This is especially important in the front, for protect the front axle how normally is little fragile.

Also is recommended for the sides to avoid getting caught

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