JOHN W. EVERT | Mechanical Engineering Technology
Testing
Phase 1 - Dimensionality
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Must measure 11.75” diameter x 1.25” wide
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Rotor body must mount to a hub carrier with eight 5/16” fasteners on a 7-inch bolt circle.
Phase 2 - Off-car testing
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Reduce the static mass by 20%.
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Was only able to acheive a 12% reduction in mass (12.9lbs vs 11.35lbs)
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Confirm an existing manufacturer’s claim of 34% reduction in the moment of inertia. Litebrake.com
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Material selection and careful machining was only able to reduce Moment of Inertia by 24%
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Phase 3 - On-car testing
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Rotor assembly must be able to resist the forces created by an angular velocity of 315 rad/sec (3000RPM)
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AT 100MPH, rotor/wheel is spinning at ~1200RPM
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Dissipate the heat generated from 125 kilowatts of kinetic energy if mounted on the front axle of the racing car
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Repeatedly. For 74 laps until the rotor body warped.
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Rotor must be able to resist the torque provided by the linear deceleration rate of 8 m/s^2
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GPS Telemetry shows that entry/exit speeds and braking zone times are reasonaly consistent to provide proof of such a deceleration event
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