CR21 and CR22 naming for the rear rotor floaters.
No part-specific design process is documented. The Brakes subsystem design process applies: 1. Set tire loads at the maximum airspeed seen (90 mph): rear 291.60 lbf at max acceleration, front 454.21 lbf under braking, 427.97 lbf cornering. 2. Sweep master cylinder bore combinations against required pedal force and achievable deceleration, then select. 3. Run a transient thermal simulation of the rotor for a single braking event (2.4 s, 260 C initial, 90 W/m^2-K film coefficient, 0.8 emissivity, 25,375 W heat flux front) and import that thermal load into a static structural run (1.84 g deceleration, 12 MPa pad pressure, 707 N-m moment) with cylindrical and frictionless supports. 4. Compare candidate materials on peak and low temperature and on minimum factor of safety. 4340 gave 741.2 C high, 344.5 C low and FoS 3.6438, against Class 40 cast iron at 490.5 C, 256.5 C and FoS 2.1622. 5. Validate with brake rotor temperature sensors on all four corners and compare measured against calculated.
Class 40 gray cast iron. From the cost report drawings and CAD: From the cost report drawings: Titanium Grade 10 (Rear Rotor Floater).
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. REAR ROTOR FLOATER (in): 7.56, 0.30, 11.11, 0.44, 6.35, R0.25 Rear Rotor Floater (as drawn): 0.15, 0.60, 0.62, 1.03, 2.10 Source: Cost report drawings: CR22/Document Submissions/Cost Report/Suspension/Cost Report Drawings/Brake System/PDFS/REAR ROTOR FLOATER.pdf; CR22/Suspension/Design/01_Cost_Report/Cost Report Drawings/Brake System/PDFS/REAR ROTOR FLOATER.pdf; CR25/Suspension/Management-Comp/Cost Report/Drawings/Brakes - Rotor Assembly/Rear Rotor Floater.pdf Quantity per car, as costed: 12
Nothing in CrimsonStorage covers these yet.