Driver controls on the steering wheel.
Six buttons controlling display page, alternate page, autoshift, radio and flag data, with spares. Wired through a dev board that sends CAN messages to the dash.
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.
None recorded. This part has no entry in Knowledge_Transfer/Issue Logging/Fault Vault.xlsx, in either Issue Log.xlsx, in CR22/Issue Tracking/Shakedown 7-15-23.xlsx, or in any design review issue list found in CrimsonStorage or Box.
CAD mass, CR26I master assembly: 0.006 lb (0.003 kg), 6 instances, 0.039 lb total. CG at X 33.93 in, Y -0.01 in, Z 22.56 in in vehicle coordinates. (CAD component: Button) CAD mass, CR25 master assembly: 0.006 lb (0.003 kg), 6 instances, 0.039 lb total. CG at X 33.93 in, Y -0.01 in, Z 22.56 in in vehicle coordinates. (CAD component: Button) CAD mass, CR22 master assembly: 0.006 lb (0.003 kg), 6 instances, 0.039 lb total. CG at X 33.27 in, Y -0.01 in, Z 21.89 in in vehicle coordinates. (CAD component: Button) CAD mass, CR26E master assembly: 0.006 lb (0.003 kg), 6 instances, 0.039 lb total. CG at X 33.05 in, Y -0.00 in, Z 20.59 in in vehicle coordinates. (CAD component: CR26E Buttons) Source: SolidWorks mass model exports: CR22 (5 May 2024), CR25 (4 Jul 2025), CR26I (30 Jul 2025), CR26E (22 Mar 2026) Quantity per car, as costed: 1
Nothing in CrimsonStorage covers these yet.