Close out the opening around the fuel cell and shield it from the exhaust.
A CFRP and Nomex honeycomb sandwich panel similar to the firewalls, with aluminised heat shielding near the exhaust secondary and gold heat shielding film lining the rest of the plate.
No part-specific design process is documented. The Fuel subsystem design process applies: 1. Set tank volume from endurance consumption plus margin, with the HydraMat area and the tank CG as constraints. CR26: 1.4 gal cell, 1.56 gal effective system. 2. Design the sump to the acceleration cases: 1.42 g at 45 deg from vertical under acceleration against a rear wall 30 deg from vertical, and 2.51 g at 66.5 deg from vertical under braking against a vertical front wall. 3. Lay up the sump: 1 layer of Kevlar over 5 layers of stitched carbon twill on HIPS dissolvable molds, bonded with 3M DP420, sealed with Caswell epoxy gas tank sealer. 4. Design the top plate: -4 AN weld bungs instead of fittings, stud bulkhead terminals so no fuel path runs through wire, an aluminium terminal block for proper bulkhead seating. 5. Leak test the assembled system before it goes in the car.
Waterjet from sheet, or laid up on a milled or 3D printed mold.
CFRP and Nomex honeycomb sandwich, aluminised and gold heat shielding film.
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.
CAD mass, CR26I master assembly: 0.624 lb (0.283 kg). CG at X 64.92 in, Y -6.89 in, Z 8.55 in in vehicle coordinates. (CAD component: Fuel Block Off Plate rev002) CAD mass, CR25 master assembly: 0.624 lb (0.283 kg). CG at X 64.92 in, Y -6.89 in, Z 8.55 in in vehicle coordinates. (CAD component: Fuel Block Off Plate rev002) 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. Fuel Block Off Plate rev002 (as drawn): 0.64, 21.97, 31.56 Source: SolidWorks mass model exports: CR22 (5 May 2024), CR25 (4 Jul 2025), CR26I (30 Jul 2025), CR26E (22 Mar 2026) | Cost report drawings: CR25/Powertrain/Design/Y - Cost Report Drawings/Fuel/Fuel Block Off Plate rev002.pdf; CR26i/Powertrain - IC/Design/Y - Cost Report Drawings/Fuel/Fuel Block Off Plate rev002.pdf; CR27i/.Powertrain/Design/Y - Cost Report Drawings/Fuel/Archive/Fuel Block Off Plate rev002.pdf Quantity per car, as costed: 1
Nothing in CrimsonStorage covers these yet.