My rig uses Ricmotech GTPro pedals with hydraulic brake master cylinder which then compresses a composite bushing. The pedal travel and effort are infinitely adjustable. Then with the desired configuration/calibration of iRacing software, the pedal effort to reach 100% braking is finalized. My pedal travel for 100% braking is about 3/4 inch with about 50 pounds of leg force. (I am handicapped from an aircraft crash where I broke both femurs and my left tibia so the force I can apply to the brakes is limited. Before the accident, I had the brakes calibrated to reach 100% with 100 pounds of force and about 1" of travel. )
My leg is bent at the knee at about 30 degrees to insure I am using my quadricep as well as my calf and ankle muscles at max braking. The other critical angle is at the ankle. I am pressing on the pedal with the ball and big toe of the foot with the ankle 90 degrees to my leg. This allows for fine control of brake force even down to 10% braking or 5 pounds of force.
In order to get the correct geometry, I fabricated a semicircular block to support and position my heel. To insure my foot was always correctly positioned on the pedal, I fabricated a "cuff" for my ankle. (see Figure above) The cuff was sculpted by carving a yoga block and is attached to the foot plate with HD Industrial Velcro.
The throttle is set to have 2 inches of travel. To allow for heel/toe shifting, the throttle at "zero" is even with the brake pedal when brakes are applied. So at full throttle the pedal is 2 inches further "away". My heel support for the throttle is forward of the heel support for the brake. My leg is less bent as little force is needed for the throttle and movement is controled with the ankle. At full throttle, the right ankle is at 100 degrees and about 90 degrees at the most critical 50% throttle position.
Once the geometry is fixed, it will take several hours of practice to sufficiently develop the muscle memory to apply fine pedal inputs accurately and consistently.
No comments:
Post a Comment