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).
Chart of springs suitable for 25 HP dampers.
| Identifier | ExFiles\Box 105\3\ scan0201 | |
| Date | 1st November 1931 | |
| By.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. Sft.{Mr Swift} c. Sft{Mr Swift}/Mr.Brock. X5520 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}2/AD2.11.31. Herewith chart of the springs we have found suitable for obtaining the new loads on the 25 HP. dampers. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||