From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Specification and recommendation sheet for a clutch for a 25/30 HP model.
| Identifier | ExFiles\Box 129\4\ scan0221 | |
| Date | 9th May 1938 | |
| r.8/B. BORG & BECK CLUTCHES. BORG & BECK COMPANY, LTD. TACHBROOK ROAD, LEAMINGTON SPA, WARWICKSHIRE. Index No. Date 9.5.38. MAKE OF VEHICLE ROLLS-ROYCE TYPE MODEL 25/30 H.P. YEAR SERIAL No. SPECIFICATION. Weight Total Loaded Weight of Vehicle Up to 2 tons Pay Load 5 passenger Engine Make of R.R. Model 25/30 H.P. Class (Petrol or Diesel) Petrol Bore (3-1/4") 3.500 Stroke 4-1/2 Number Cylinders 6 Torque Maximum 200 Lbs. Ft. and at 1750 Revs. Max. Revs. of Engine 5000 As on Bentley installation Flywheel Weight Outside Diameter Radius of Gyration Engine Mounting If Engine is Flexibly mounted and Articulates round Crankshaft Axis state Maximum Amount of movement at 2ft. Radius Gear Box Make R.R. Model Unit or Independent Construction Unit Actuation Ratio of Disengaging Leverage 8.85/1 Method of Actuation. Manual If Automatic Type Drawings Customer Installation Drawings attached Nos. and Description Remarks: Data obtained 9.5.38. RECOMMENDATIONS. BORG & BECK COMPANY'S RECOMMENDATIONS. Type 11 Q.F. Spec. No. BB.471 Release Bearing Customer Spline x 10 1-1/4" Standard Special Disc Spring Yellow Springs Wt. Designated 110-120 (L.Blue) Quantity 9 Drawings and Installation 23000 (with B&B Plate) Actuation Recommendations Dates Made 9th May, 1938. CYK/1905 Remarks: Release Bearing Pressure = 235 to 250 lbs. See B&B Letter of 28-12-38 AUTOMOTIVE DIVISION. | ||