The foam element of the headrest.
SFI 45.2 foam providing the required energy absorption. Design Philosophies and Processes: Inherited from the Ergonomics subsystem design process: 1. Take driver body measurements and place them against the ergonomics study ranges. 2. Mold the seat insert to the driver in the car with expanding foam, then hand post-process and cover. 3. Set headrest and harness mounting to the rules and to the driver's shoulder height. 4. Run a simulator or on-track endurance stint and measure fatigue with EMG. 5. Iterate the insert shape at the identified pressure and support points.
SFI 45.2 rated foam.
Fault Vault, CR25, Design, Complete Failure. The headrest pad was too short and the head restraint did not meet rule T.2.8.6 for the tallest driver. Fixed by making a longer headrest pad.
Longer headrest pad made so head restraint meets rule T.2.8.6 for the tallest driver.
Chassis weight breakdown: CR25 0.830 lb, CR26E CAD 0.871 lb. CAD mass, CR22 master assembly: 3.536 lb (1.604 kg). CG at X 61.93 in, Y 0.00 in, Z 29.63 in in vehicle coordinates. (CAD component: CR22-CH-Headrest pad) CAD mass, CR26E master assembly: 0.871 lb (0.395 kg). CG at X 61.33 in, Y -0.00 in, Z 30.74 in in vehicle coordinates. CAD mass, CR26I master assembly: 3.536 lb (1.604 kg). CG at X 61.91 in, Y -0.00 in, Z 29.09 in in vehicle coordinates. CAD mass, CR25 master assembly: 3.536 lb (1.604 kg). CG at X 61.91 in, Y -0.00 in, Z 29.09 in in vehicle coordinates. Source: CR26E/Systems/03 - Mass Model/ChassisWeightBreakdown.xlsx | SolidWorks mass model exports: CR22 (5 May 2024), CR25 (4 Jul 2025), CR26I (30 Jul 2025), CR26E (22 Mar 2026)
Nothing in CrimsonStorage covers these yet.