CR22 naming for the rear bellcrank pivot bung.
See the Front Bellcrank Bung entry for the single-shear analysis notes.
No part-specific design process is documented. The Bellcranks subsystem design process applies: 1. Take the wheel rate target from kinematics; the bellcrank is named by it (CR26I front is the 150 lb/in wheel rate crank, rear the 200 lb/in). 2. Set the architecture: connection points, pivot location, double or single shear. 3. Size the pivot for shear from the vector sum of rod and damper loads. 4. Run single-plate FEA for deflection first, then stress. CR26I rear single plate at 0.19 in gave FoS 3.54. 5. Calculate the wheel rate change that the measured deflection produces, and confirm it is inside tolerance. 6. Fit and validate the damper position sensor.
Steel.
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.
Dimensions called out on the cost report drawings. These are the figures printed on the drawing, not a labelled specification; open the drawing itself for what each one refers to. Front Bung Nuts pdf (as drawn): 15.24, 1.52, 36.66, 3.67, 12.00, R1.20, 29.00, 2.90, M25x1.5 Front Bungs pdf (as drawn): 14.10, 1.41, 33.15, 3.32, 25.00, 2.50, 19.30, 1.93, 109.99, 11.00 Rear Bungs pdf (as drawn): 19.05, 1.91, 10.16, 1.02, 13.21, 1.32, 15.00, 1.50, 53.26, 5.33 Source: Cost report drawings: CR22/Document Submissions/Cost Report/Suspension/Cost Report Drawings/Suspension & Shocks/Front Indirect Actuation Assembly/Front Bung Nuts pdf.PDF; CR22/Document Submissions/Cost Report/Suspension/Cost Report Drawings/Suspension & Shocks/Front Indirect Actuation Assembly/Front Bungs pdf.pdf; CR22/Document Submissions/Cost Report/Suspension/Cost Report Drawings/Suspension & Shocks/Rear Indirect Actuation Assembly/Rear Bungs pdf.pdf; CR22/Suspension/Design/01_Cost_Report/Cost Report Drawings/Suspension & Shocks/Front Indirect Actuation Assembly/Front Bung Nuts pdf.PDF and 2 more Quantity per car, as costed: 2
Nothing in CrimsonStorage covers these yet.