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).
Borg & Beck clutches specification and recommendation sheet for a vehicle with a Bentley engine.
| Identifier | ExFiles\Box 129\2\ scan0107 | |
| Date | 4th November 1935 | |
| CWH/DT BORG & BECK CLUTCHES BORG & BECK COMPANY, LTD. TACHBROOK ROAD, LEAMINGTON SPA, WARWICKSHIRE. Index No. Date 4.11.35 MAKE OF VEHICLE ROLLS ROYCE TYPE MODEL YEAR SERIAL No. SPECIFICATION Weight Total Loaded Weight of Vehicle 35 Cwt. Pay Load Engine Make of BENTLEY Model 3 1/2 Litre Class (Petrol or Diesel) PETROL Bore 3-1/4 Stroke 4-1/2 Number Cylinders 6 Torque Maximum 206 Lbs., Ft., and at 2000 Revs. Max. Revs. of Engine 5000 Flywheel Weight 48 Outside Diameter Radius of Gyration .34 Slugs ft.2 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 Actuation Ratio of Disengaging Leverage 8.75 Method of Actuation. Manual If Automatic Type Drawings Customer Installation Drawings attached Nos. and Description Remarks: Torque increased from 178 to 206 lbs. ft. per Mr. Barker 4.11.35 Data obtained 4.11.35 BORG & BECK COMPANY'S RECOMMENDATIONS Type 10 A-6 Spec. No. BB.297 Release Bearing Customers Spline 1 1/4 x 10 Disc SPRING (RED) Springs Wt. Designated 125-135 lbs.(BROWN & WHITE) Quantity 12 Drawings and Installation SK.30604/2 but A-6 Actuation 1500 Recommendations Dates Made 4th Nov. 1935 Cuyhggt- Remarks: Spring to be on mean to low poundage balance within one half ounce inch. AUTOMOTIVE DIVISION | ||