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 Borg & Beck clutch system for a Bentley 3 1/2 litre engine.
| Identifier | ExFiles\Box 129\2\ scan0046 | |
| Date | 15th May 1935 | |
| BORG & BECK CLUTCHES BORG & BECK COMPANY, LTD. BROCK HOUSE, LANGHAM STREET, LONDON, W.1. Index MAKE OF VEHICLE ROLLS-ROYCE TYPE No. MODEL YEAR SERIAL No. Date 15.5.35 SPECIFICATION Weight Total Loaded Weight of Vehicle 35 cwt. Pay Load Engine Make of BENTLEY Model 3 1/2 litre Class (Petrol or Diesel) [Diesel is crossed out] Bore 3-1/4 Stroke 4-1/2 Number Cylinders 6 Torque Maximum 178 Lbs., Ft., and at 2,000 Revs. Max. Revs. of Engine 5,000 Flywheel Weight 48 lbs. 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 [Independent Construction is crossed out] Actuation Ratio of Disengaging Leverage 8.75 Method of Actuation Manual or Automatic Type [Automatic Type is crossed out] Drawings Customer Installation Drawings attached No's and Description B & B SK-30604/2 exactly Remarks : Data obtained 15th May 1935 Borg & Beck Company's RECOMMENDATIONS Type 10A3-G Spec. No. BB.242 Release Bearing Customer Spline 1-1/4" x 10 Disc. Spring (Red) Springs Wt. Designated 147 - 155 lbs (Brown) Quantity 9 Drawings and Installation SK-30604/2 Actuation Recommendations Dates Made 15th May 1935 Cunliffe Remarks : 2 Driven Plates marked "A" Red springs. 2 " " " "B" Yellow springs. AUTOMOTIVE DIVISION | ||