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 system from Borg & Beck.
| Identifier | ExFiles\Box 129\2\ scan0108 | |
| 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 [DIESEL strikethrough]) 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 lbs. Outside Diameter: [strikethrough] I: 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 [of Independent Construction strikethrough] Actuation Ratio of Disengaging Leverage: 8.75 Method of Actuation: Manual [or Automatic Type strikethrough] Drawings: Customer Installation Drawings attached Nos. and Description B & B. SK-30604/2 exactly 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 A3 Spec. No.: BB.242 Release Bearing: Customer Spline: 1-1/4" x 10 Disc. Spring: (Red) Springs Wt. Designated: 180-190 lbs. (RED) Quantity: 9 142 D Drawings and Installation: SK-30604/2 Actuation: [Signature: CWHiggs] Recommendations Dates Made: 4.11.35 Remarks: Springs to be on mean to low poundage. Balance within one half ounce inch. AUTOMOTIVE DIVISION | ||