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).
Rear spring deflection specifications for cars intended for the American market versus English conditions.
| Identifier | ExFiles\Box 18\3\ Scan203 | |
| Date | 30th December 1930 | |
| To Sg.{Arthur F. Sidgreaves - MD} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} x7960. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/MJ.30.12.30. 58-GN. With reference to Sg{Arthur F. Sidgreaves - MD}9/E29.12.30. The rear spring deflection for America we are recommending, is 10.25". Your springs have this deflection but have not been designed to accomodate the increased stress. This is why we stated that they were not the final spring for America. However, there should be no danger in your using them for English conditions. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||