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).
Technical note detailing spring rate specifications.
| Identifier | ExFiles\Box 95\3\ scan0110 | |
| Date | 19th June 1935 | |
| Rate per inch. 160.5 lbs. 1653 lbs. Rate per inch of combination. 1813.5 lbs. Rate per inch at wheel. 193.7 lbs. The joint rating of these springs is the same as that of those at present fitted to this car - See note Hs{Lord Ernest Hives - Chair}/LES.19.6.35. | ||