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).
Internal request to scheme some sodium-filled exhaust valves for trial on the Bentley V or Wraith.
| Identifier | ExFiles\Box 100\3\ scan0018 | |
| Date | 16th January 1939 | |
| HSH and 65H To By/Ald.{F. Allwood - Experimental Design} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Will you please scheme some sodium filled exhaust valves for trial on the Bentley V or Wraith. Other than the stems and guides which will be of increased diameter, the head should be the same dimensions as standard Wraith. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||