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 to manufacture a coupling for the Wraith transmission.
| Identifier | ExFiles\Box 156\4\ scan0080 | |
| Date | 25th May 1938 | |
| 1330 HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}8/R.25.5.38. WRAITH TRANSMISSION. Will you please make for us:- 1 Coupling to Ex.31301. This is equivalent to the inertia we have been adding to the Sliding Joint of the Propeller Shaft. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||