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).
Requesting the manufacture of 12 hardened shock damper pistons and valves to new drawings.
| Identifier | ExFiles\Box 99\3\ scan0123 | |
| Date | 25th January 1939 | |
| 442 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c. By.{R.W. Bailey - Chief Engineer} c. Da.{Bernard Day - Chassis Design} Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}4/MH.{M. Huckerby}25.1.39. SHOCK DAMPER PISTONS - B.V. Will you please make 12 pistons and valves to the drawings FB.4608/9. The difference between these and previous pistons is that the piston is hard. The hardening can be carried out in a cyanide bath, to reduce distortion. It may in future be necessary to make all pistons and valves hard, as the valve seats have been pitting, probably due to picking up. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||