Separate the crankshaft from the oil in the sump so the crank does not aerate or drag through it.
A tray between the crankshaft and the oil reserve. Reduces windage losses and reduces aeration of the oil, which protects oil pressure.
No part-specific design process is documented. The Lubrication subsystem design process applies: 1. Set capacity and pan geometry from the packaging envelope and the CG target. CR26I: 1.95 qt pan, 3 qt system, low-profile design lowering engine CG by 1.6 cm on the earlier revision. 2. Design the baffle and trap door layout, keeping baffle clearances tight and stiffening the mounting flange to improve gasket reliability. 3. Size the oil cooler from measured heat rejection. 4. Select the oil to meet Yamaha's specification (API SP, JASO MA2) with wet-clutch-safe additives. 5. Validate on the sloshing test tracks, logging oil pressure against lateral and longitudinal acceleration. Test 1 minimum oil pressure 30.7 psi at 7,200 rpm with 1.41 g sustained for 1 s and a 2.21 g peak; test 2 minimum 31.3 psi at 6,000 rpm with a 2.02 g peak. 6. Send an oil sample for analysis after 500+ miles of track and dyno running.
Aluminium. From the cost report drawings and CAD: From the cost report drawings: 6061 Aluminum Alloy (Windage Tray); Aluminum (CR25 Windage Tray 002).
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, CR22 master assembly: 0.107 lb (0.049 kg). CG at X 75.63 in, Y 0.71 in, Z 4.07 in in vehicle coordinates. 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. Windage Tray (as drawn): 31.75, R13.97, 85.85, 148.84, 38.10, 1.59 CR25 Windage Tray 002 (as drawn): 148.08, 14.81, 159.51, 15.95, 1.60, 0.16 Source: SolidWorks mass model exports: CR22 (5 May 2024), CR25 (4 Jul 2025), CR26I (30 Jul 2025), CR26E (22 Mar 2026) | Cost report drawings: CR22/Powertrain/Design/X - Cost Report Drawings/Lubrication Drawings/Windage Tray.pdf; CR25/Powertrain/Design/Y - Cost Report Drawings/Lubrication/CR25 Windage Tray 002.pdf; CR26i/Powertrain - IC/Design/Y - Cost Report Drawings/Lubrication/CR25 Windage Tray 002.pdf; CR27i/.Powertrain/Design/Y - Cost Report Drawings/Lubrication/Archive/CR25 Windage Tray 002.pdf Quantity per car, as costed: 1
Nothing in CrimsonStorage covers these yet.