Dimension brakes?

[power101]

Hello,

I will dimension brakes to a go cart.

First I have to find information for brake proofs (friction coefficient and maximum surface pressures)

Then calculate the brake aspect with maximum friction force average wheels and asphalt.
Maximum friction coefficient is 0.8 and the diameter on the tire is 20cm.

I will also dimension the discs (diameter) and the blocks(size).

The last is to decide necessary pressure force on the brake proofs.

Would be grateful for little help with how to do this :)

[power101]

the car weighs 100kg and the weight distribution is 40% in front and 60% back

[Kenny_McCormic]

A single disc brake on the rear axle will easily lock it up.

[dpaxson]

first of all is it really necessary to make all these calculations? if you just want to do it out of interest's sake then here's how you would do it. since most hydraulic brakes can lock up the rear wheels of a kart you don't have worry about the coefficient of friction of the brakes or any of those dimensions. the deciding factor will be the maximum coefficient of static friction between your tires and the road. multiply the coefficient of friction between rubber and asphalt by the weight of the kart times the rear bias and this will give the maximum stopping force in newtons which can be plugged into the equation Force = mass x acceleration to find the maximum decelleration.

[power101]

well yes, im doing it just for the interest's sake.

So i have the coefficient of static friction between your tires and the road: 0.8

multiply that with the weight of the kart: 100kg

but what is the rear bias???

And that will get the maximum force between tires and the road

Then use it in: Force = mass x acceleration => acceleration=Force/mass
to get the decelleration, but is that the brake force?

Then i have the calculate the braking torque? how do i do that?

And at last the compressive force on the brake linings?

[Kenny_McCormic]

I have a 200lb kart, with my 200lbs in it, it would still lock up with a chewed up 4" band. ANY hydraulic disc brake will be overkill.

[jr dragster Tyler]

There's no reason to calculate breaking ratio's. Pretty well any decent mechanical disk brake will lock up.