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).
Clutch specification and recommendation sheet for the 20/25HP model.
| Identifier | ExFiles\Box 129\2\ scan0162 | |
| Date | 19th December 1935 | |
| BORG & BECK CLUTCHES BORG & BECK COMPANY, LTD. TACHBROOK ROAD, LEAMINGTON SPA, WARWICKSHIRE. Index No. Date 19.12.35 MAKE OF VEHICLE ROLLS-ROYCE MODEL 20/25HP YEAR TYPE SERIAL No. SPECIFICATION Weight Total Loaded Weight of Vehicle Up to 2 tons Pay Load 5 passengers Engine Make of R.R. Model 20/25HP Class (Petrol or Diesel) Petrol Bore 3-1/4 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 19.12.35 Borg & Beck Company's RECOMMENDATIONS Type 11 A3 Spec. No. BB.252 Release Bearing Customer Special Spline 1-1/4" x 10 Disc. Spring Yellow Springs Wt. Designated 125-135 lb. Cream Quantity 12 Drawings and Installation SK.30600 Actuation Recommendations Dates Made 19th December 1935 Remarks: Release Bearing Pressure to release Clutch = 300 lb. AUTOMOTIVE DIVISION 151-a 1359 560 | ||