The clamping load is assumed to act on all friction surfaces equally.
Stopping distance g force calculator full#
Note: the difference is because full circle brakes contact on the full face but caliper pads are not usually a quadrant but have square sides (Given the variability of friction the difference is not important in practice).
The effective radius (torque radius) of a brake disc is the centre of the brake pads by area. This may be achieved by varying the brake size or more likely using a valve to reduce the actuation pressure. For some legislation the distribution between front and rear brakes is laid down. Having decided which wheels will need braking to generate sufficient braking force the torque requirements of each wheel need to be determined. The maximum braking force possible on any particular axle before wheel lock is given by: The braking force can only be generated if the wheel does not lock because the friction of a sliding wheel is much lower than a rotating one. The total braking force required can simply be calculated using Newton’s Second Law. The rear axle load is the difference between the vehicle mass and the front axle load and cannot be negative. Note: The front axle load cannot be greater than the total vehicle mass. They only depend on the static laden conditions and the deceleration. The changes in axle loads during braking bears no relationship to which axles are braked. Note: this changes with the loading of the vehicle so laden and unladen figures are often different.ĭynamic Axle Loads (Two Axle Vehicles Only) They should work for any two axle vehicle but it’s YOUR RESPONSIBILITY to verify them. This page pulls them together with just a little explanation. There are many books on brake systems but if you need to find a formula for something in particular, you never can.
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