Catch coolant expelled through the radiator cap as the system heats up, and return it as the system cools.
A vented reservoir connected to the swirl pot overflow. Rules require that expelled fluid be contained rather than dropped on the track.
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. From the cost report drawings and CAD: From the cost report drawings: PA6-GF30 (Catch Can v.003); Steel (Coolant Catch Can).
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. Catch Can v.003 (as drawn): 187.96, 18.80, 186.69, 18.67, 74.93, 7.49, 123.19, 12.32, 9.53, R0.95 Coolant Catch Can (as drawn): 117.04, 11.70, 171.45, 17.15, 24.23, 2.42, 60.91, 6.09, 9.53, R0.95 Source: Cost report drawings: CR25/Powertrain/Design/Y - Cost Report Drawings/Cooling/Catch Can v.003.pdf; CR25/Powertrain/Design/Y - Cost Report Drawings/Cooling/Coolant Catch Can.pdf; CR26i/Powertrain - IC/Design/Y - Cost Report Drawings/Cooling/Catch Can v.003.pdf; CR26i/Powertrain - IC/Design/Y - Cost Report Drawings/Cooling/Coolant Catch Can.pdf and 2 more Quantity per car, as costed: 1
Nothing in CrimsonStorage covers these yet.