CR22 combined catch can serving both the coolant and lubrication circuits.
Split into separate coolant and oil catch cans from CR25 onward, when oil cooling moved off the water circuit.
No part-specific design process is documented. The Cooling, Powertrain subsystem design process applies: 1. Define measured heat rejection from previous-year endurance data. 2. Iterate core parameters in the MATLAB NTU-epsilon analysis until the target is beaten with margin, at the stated assumptions: steady state, single-phase water, constant air mass flow from CFD at 32 mph average endurance speed, 105 C water inlet, 27 C air inlet, constant fluid properties. 3. Give the core geometry to Aerodynamics for duct, shroud and radiator angle design; take back the achieved mass airflow. 4. Lay out the water loop: pump at the lowest point, swirl pot cap at the highest, bleed valve on the top tank, temperature bungs at inlet and outlet. 5. Validate on a mock endurance with inlet and outlet thermistors and back-calculate heat rejection.
Welded from sheet or tube.
Aluminium.
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.
Nothing in CrimsonStorage covers these yet.