Give the driver direct, modulated control of the clutch for launches and for getting the car moving.
An OEM Yamaha R6 clutch handle on a custom cable, mounted in the cockpit. CR26I updated the grip handle to improve fine clutch control, and added a rounded tube cap that prevents the driver's wrist restraint being caught.
No part-specific design process is documented. The Shifting subsystem design process applies: 1. Route every line and fitting in SolidWorks. Lines cannot be within 1 in of the engine casing or 3 in of the exhaust; bend radius is 4 in. 2. Size the cylinder bore and line inner diameter with full calculations rather than by picking a catalogue part. 3. Fit the linear potentiometer and set the position bounds that define a completed shift. 4. Tune the preload duration and the torque reduction window on track. 5. Measure the result. CR26I averaged 65 ms cut time across endurance closed loop against 85 ms open loop; across 180 upshifts that is 9 seconds under power cut instead of 15.3 seconds.
The clutch handle system is treated as vehicle-critical. Maximum 5th percentile female grip strength is 43.4 lbf (19.7 kg); applying the team-wide vehicle-critical safety factor of 1.5 gives roughly 28.9 lbf as the allowable pull force. Fish scale testing measured an average maximum of 22.5 lbf to pull the clutch handle, which sits inside that limit.
OEM Yamaha R6 clutch handle, custom clutch cable.
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.
Nothing in CrimsonStorage covers these yet.