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).
Weight analysis of the 10,000 Miles Bentley 4-B-IV, detailing component weight savings and increases.
| Identifier | ExFiles\Box 88\3\ scan0054 | |
| Date | 28th August 1934 | |
| X258 28.8.34. Weights of the 10,000 Miles Bentley 4-B-IV, starting test July 10th. (A) Weight Saving. Lbs. Ozs. (1) Gearbox and clutch pit in magnesium NOT YET STANDARDISED - 11 9 (2) Radiator - 15 0 (3) Dynamo - 7 6 (4) Floorboards (Bottom half, test not completed) - 8 8 Total weight saving - (Bottom half not included) 37 10 (B) Weight Increase. (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 Total: 23 15 Therefore the nett saving in weight on this car over the present standard is - 13 Lbs 11 oz Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} LBS CROSS MEMBER BETWEEN LAMP BRACKETS. 8 NOT YET STANDARDISED | ||