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).
Vibration troubles with existing 1/4 inch push rods, requesting a new set of 5/16 inch diameter rods be made for the Wraith III.
| Identifier | ExFiles\Box 6\6\ 06-page420 | |
| Date | 13th January 1938 | |
| 600 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} Rm{William Robotham - Chief Engineer}/Swd1.1/MH.{M. Huckerby}13.1.38. WRAITH III. Some vibration troubles have been experienced on the existing 1/4 dia. push rods and we have written a report requesting the use of 5/16 dia. push rods which have been found to cure the trouble. In view of the above, will you please make one set of 5/16 dia. rods, otherwise to EW.1412, which are to be fitted to 20.G.VI. when ready. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||