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).
Requesting the preparation of stellited and silichrome exhaust valves for the Spectre and 20/25 HP engines.
| Identifier | ExFiles\Box 106\5\ scan0146 | |
| Date | 23th September 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} x554 HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}17/KW.23.9.35. 20/25 HP. & SpectreCodename for Phantom III Exhaust Valves. Will you please prepare a set of 12, KE-965 stellited exhaust valves for the SpectreCodename for Phantom III, six of which should be fitted to SpectreCodename for Phantom III II before it goes away, or alternatively follow it. Will you also prepare three stellited exhaust KE-965 and three stellited silichrome valves for the large inlet valve 20/25 head at present being completed. These will run 10,000 miles on B-14 unit in 21-G-IV. HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||