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).
The status of strengthened E.V. exhaust valves and double valve springs.
| Identifier | ExFiles\Box 161a\3\ scan0163 | |
| Date | 5th May 1939 | |
| -11- HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel}6/BA.5.5.39. Strengthened E.V. Exhaust Valves. These are instructed under BA.27/4 on the 24.4.39. AG..reported that he now has the forgings and was requested to give promise of completion at the next meeting. E.V. Double Valve Springs PD.354. It was reported that the details required in connection with the above are now completed. Rm{William Robotham - Chief Engineer}/Swil, was requested to let us know to which engine he would like same to be fitted. HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel} | ||