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).
Request for experimental modifications to Phantom III rocker shafts due to service failures.
| Identifier | ExFiles\Box 96\2\ scan0241 | |
| Date | 11th June 1937 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}15/AP.11.6.37 PHANTOM III. 354 Will you please produce the following in connection with Experiments on account of the several rocker shafts that have failed in service. (1) 2 rocker shafts to E.86887 but with .265" holes drilled for pedestal studs, instead of the present .3248 holes. These shafts will require 1/4 studs and spherical washers to suit. (2) 2 rocker shafts identical to E.86887 but the pedestal holes chamfered top and bottom to prevent sharp corners. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||