Paddles

Subteam: ChassisSubsystem: SteeringAssembly: Paddle ShiftersCars: CR21, CR22

Purpose

The individual paddle levers.

Design Process

No part-specific design process is documented. The Steering subsystem design process applies: 1. Kinematics sets steering geometry, Ackermann targets and rack travel. 2. Size the column and shafts for torsional stiffness and for the bearing housing that supports them. 3. Calculate static steering force from the tire and geometry, and check it against anthropometric limits. 4. Design the wheel shell around the button and switch layout and the dash sightline; prototype grips and take driver feedback. 5. Validate steering effort and Ackermann on track, using the alternate tie rod mounts to sweep setups.

Full Material List

PETG, 3D printed on CR26I.

Reoccuring issues

CR22 Issue Log, 2024-02-10: a paddle fell apart in the driver's hands during a drive day. Lack of material strength plus high actuation force. Recorded fix: investigate stronger materials and new geometry.

Still to document

Nothing in CrimsonStorage covers these yet.

Function — How does it do it
Design Constraints — What held back the design whether it be location, time, materials etc
Analysis — How you get quantitative, predictive information on the part
Manufacturing Process — How it is assembled in detail from start to finish
Improvements — Improvements for this generation
Properties — Size, weight, mass, charge, thermal properties, anything else relevant