Assembly line covering the complete engine cooling circuit.
Groups the radiator, pump, swirl pot, catch can, cap, fan, shroud, ducts and lines. Design Philosophies and Processes: Inherited from the Cooling, Aerodynamics subsystem design process: 1. Powertrain sets the required heat rejection from previous-year endurance data; that becomes a target mass airflow (CR26I: 0.265 kg/s water, 0.060 kg/s oil). 2. Characterise the core on the flow bench to get pressure drop against velocity, and fit Darcy-Forchheimer coefficients (water radiator viscous 1,919,749.6, inertial 52.945; oil cooler viscous 7,387,951.3, inertial 132.358). 3. Model the core in ANSYS Fluent as a porous region and the fan as a pressure jump over a fan boundary, using the manufacturer fan curve. 4. Sweep radiator angle. CR26I found 0 deg gave 0.459 kg/s with 0.78 lbf drag, +45 deg forward lean gave 0.343 kg/s with 0.31 lbf drag. Forward lean was accepted because it still beat target and cut drag and lift. 5. Design the duct and shroud around the chosen core position, then validate the assembled system with tufting and coast-down testing.
Fault Vault, 2026-06-07, CR26I, Operational Errors, Performance Failure. Improper bleeding left excess air in the cooling system. The pump duty cycle was too high for air to be released and the pump's PWM control did not enable until the engine was on. Recorded fix: change M1 Build to allow cooling bleed tests, or vacuum fill the system.
Nothing in CrimsonStorage covers these yet.