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Project Objective:
Project Objective:
Produce a wheel-mounted device that enables drivers to responsively shift gears through the racecar's transmission.
Design Considerations:
Driver feel
Weight
Reliability
Packaging
Design Features:Â
Design Features:Â
Magnetic paddle restoring mechanism
Inverse logic limit switch actuation
Bent sheet metal frame (5052-H32)
PETG 3D printed paddles
51.6 % Weight reduction (0.31lbm from previous year to 0.15lbm)
Design Iterations:
Design Iterations:
Preliminary Concept CAD
flushed-out restoring mechanism and optimized frame geometry
Final Paddle iterations to reduce deflection
Material Validation:
Material Validation:
Setup to simulate paddle pull
Stress distribution across optimized part
Stress concentration in interior pocketing
Simulation Setup:
Load Cases: 177.93 N (40 lbf) toward driver
Estimated max pointer finger force (from research paper)
Radial load on spacer hole
Supports:
Frictionless along interface with steering wheel
Fixed supports at steering wheel bolt holes
Fixed Z displacement along all other hardware slots
Limits to this Model:
Measures stress in frame part assuming interior components will survive under compression
Doesn't account for paddle deflection (important for driver feel)
Doesn't account for reactionary forces at paddle joint
Margin of Safety Calculation:
IMG_9754.MOVClick Click Click
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