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).
List of weight particulars, showing increases and decreases, for the 5-B-IV 10,000 Miles Car.
| Identifier | ExFiles\Box 82\3\ scan0098 | |
| Date | 10th January 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} x4553a (3) Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}9/KW.10.1.35. 5-B-IV. 10,000 Miles Car - Weight Particulars. Particulars of Part | Increase lbs. ozs. | Decrease lbs. ozs. ---|---|--- 14" dia. brake drums | 18 10 1/2 | Axle torsion shafts, strengthened type | 14 | Lightened cross member between headlamps | 4 0 | Large oil pump | | 12 1/4 Geared starter motor | 4 0 | Rubber engine mounting (front and rear) | 11 10 | Cantilever pedals | 1 6 1/2 | Wilmot-Breeden bumper | 34 0 | Jackall Jacks complete | 46 10 | Centre spot lamp | 4 0 | Foot switch | | 15 Quick brake adjusters | 3 0 | Prop. shaft damper | 12 12 | Controlled dampers and pipe lines | 8 0 | Radiator - lightened Harrison 58 m/m.{Mr Moon / Mr Moore} matrix | | 12 8 Peregrine steering | | 9 10 Gearbox in Magnesium | | 8 6 1/2 11" Borg & Beck clutch | | 20 3 Dashboard in magnesium | | 9 7 Exhaust system lightened | | 6 12 --- TOTAL = | 150 10 1/4 | 65 14 1/4 | ||