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).
Load-deflection graph for Graham rear road springs.
| Identifier | ExFiles\Box 126\1\ scan0198 | |
| Date | 7th February 1935 guessed | |
| GRAHAM REAR ROAD SPRINGS. INITIAL DEFLN. 5.062" DEFLECTION LBS LOAD | ||