Rotary Hillclimb Racing

We have been running the new rotary hillclimb racing car for 4 months now and during this time the car has performed very well with only a few small teething problems.

It is competitive but the braking system has not been very consistent, and it is hard to drive the car to the max when I do not have confidence in the brakes.  The front brakes keep locking with the bias all the way to the rear, so we have changed the size of the rear master cylinder to 5/8” from 3/4” to get more rear bias but the front wheels keep locking under hard braking.

Front Brakes locking up

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Thanks to Ron Pommerel at RPS Engineering for calculating the location of the upper and lower positions for the pivots on the front uprights. I then could machine the uprights to take the wheel bearings for the spindles, the mounts for the brake calipers as well as the mounts for the pivots. Then the brake rotors need to be mounted, so an aluminum spindle needed to be machined to mount the brake rotor in the correct location and also to allow for clearance of the calipers inside the road wheels. The photos show the front brake rotor and spindle assembled on the upright.

Front RHS upright with brakes fitted

Front RHS upright with brakes fitted side view

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