The assembly-level line covering the complete set of nose and body panels for CR25 onward, replacing the earlier separate Body and Firewalls groupings.
Groups the nose cone, side panels, floor panels, firewalls and the seat panel into a single costed assembly. On CR26E it also carries the upwash elements and EV panels. Design Philosophies and Processes: Inherited from the EV Structures subsystem design process: 1. Take the battery segment geometry from Energy Storage: five segments at 15 lb each. 2. Lay out the tower, then set wall thicknesses from available stock above the rules minimum (floor 3.2 mm, walls 2.3 mm). 3. Validate segment structure by hand using Roark's formulas for a plate under uniform pressure, at 40 g fore/aft and lateral and 20 g vertical. Fore/aft gave sigma_max 5.75 ksi and FoS 2.78; lateral gave 9.17 ksi and FoS 1.75; down gave 0.833 ksi and FoS 19.2. 4. Validate each mount independently for static shear, pull-out and bending, fixed at a 0.25 in weld perimeter, at the 15 kN rules requirement. 5. Run structural equivalency for the load-bearing columns: mounting tabs, side wall and front wall cross sections, with I = A*t^2/12. 6. Waterjet the walls, weld on a jigging table with aluminium cube jigs, mill the mounts and weld them to the side walls.
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. Body Panels & Nose Cone (mm): 2135.3, 547.4 Source: Cost report drawings: CR26E/Aerodynamics/Cost Report & Drawings/Body & Nose/Body Panels & Nose Cone.pdf
Nothing in CrimsonStorage covers these yet.