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).
Summary of weight savings and increases for a 10,000-mile Bentley 4-B-IV test car.
| Identifier | ExFiles\Box 88\3\ scan0056 | |
| Date | 22th September 1934 | |
| 22.9.34. Weights of the 10,000 Bentley 4-B-IV, starting test July 10th. (A) WEIGHT SAVING. lbs. ozs. Gearbox and clutch pit in magnesium (Not yet standardised) 11 9 Bottom half (Not yet standardised) 8 8 Not yet adopted .................... 20 1 (1) Radiator 22 0 (2) Dynamo 7 6 (3) Floorboards 8 4 Total weight saving - 37 10 (B) WEIGHT INCREASE. Cross member between lamp brackets, (Not yet standardised) 8 3 (1) Controllable damper unit 6 0 (2) Geared starter motor 4 0 (3) Controllable damper pipe lines 2 0 (4) P.100 Headlamps 11 0 (5) Foot switch - 15 (6) Propellor shaft damper 12 12 Total weight increase - 36 11 Therefore the nett saving in weight on this car over the present standard is ....... 15 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||