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 standardization of thrust races in test bed gear box units.
| Identifier | ExFiles\Box 136\4\ scan0126 | |
| Date | 13th January 1937 | |
| J 1153. 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}9/AP.13.1.37. test Bed Units. We are continually having to change over the 1st. motion shafts in our test bed gear boxes owing to the thrust races in various engines being different sizes. As the opportunity arises, will you please see that all the units are fitted with the same up-to-date size of races. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||