CR21 front wing endplate.
Seals the low pressure region at the end of the front wing and directs air outboard around the front tire. From CR22 the endplates are split left and right and gained a fence and half-tube, a combination later measured as worth FW CLA 1.34 with tire CDA 0.225 against 1.16 and 0.241 for a flat endplate.
No part-specific design process is documented. The Front wing subsystem design process applies: 1. 2D CFD sweeps in ANSYS to place elements and set angle of attack cheaply. CR26E ran 153 two-element and 148 three-element sweeps for the rear wing on the same method. 2. Move promising 2D results into a 3D half-car model at 35 mph, chosen as a representative competition corner speed. 3. Iterate in the half-car model, tracking CLA, CDA, CoP and tire drag in an iteration tracker. 4. Run the best candidates in the performance map (PMAP) full-car model for yaw, roll and cornering. 5. Validate on track with constant-speed testing, tufting and Flo-Vis oil.
Waterjet from sheet, or laid up on a milled or 3D printed mold.
CFRP over Nomex honeycomb core.
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.