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).
Use of ZS-3 restriction plugs for lower yoke bearings on a Wraith.
| Identifier | ExFiles\Box 108\3\ scan0123 | |
| Date | 4th March 1938 | |
| 600a To Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} from Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} Chateauroux. Rm{William Robotham - Chief Engineer}/Les.8/MH.{M. Huckerby}4.3.38. 26.G.VI. We are arranging for a ZS-3 restriction plug to be used for lower yoke bearings on Wraith. Will you please use ZS-3 plugs to see if they are adequate. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||