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).
The manufacture of 12 Servo Star Springs with specific heat setting instructions.
| Identifier | ExFiles\Box 152\2\ scan0226 | |
| Date | 9th June 1938 | |
| 1294 HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} Rm{William Robotham - Chief Engineer}/AFM{Anthony F. Martindale}5/R.9.6.38. SERVO STAR SPRINGS. Will you please make 12 springs Rm.{William Robotham - Chief Engineer} 541. These are made from G.53180, but the springs must be set hot or they do not retain their set. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||