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).
Breakdown of the weights for the rear axle and springs of a car.
| Identifier | ExFiles\Box 71\3\ scan0199 | |
| Date | 26th January 1926 | |
| To Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} from RHC.{R. H. Coverley - Production Engineer} X9930 X.9410 1 X8920 RHC{R. H. Coverley - Production Engineer}2/BE. 26.1.26. RE EAC.I. -(9.EX). The weight of Rear Axle and Springs for the above car are as follows:- Rear Axle complete with Hubs,Drums and Brake Gear. 414 lbs. Rear Springs complete with Spring Clips,Shock Damper Brackets etc., Near Side........77.68 lbs) Off Side.........78.25 lbs) 155.93 lbs. TOTAL - 569.93 lbs. RHC.{R. H. Coverley - Production Engineer} | ||