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).
Request to produce two more sets of Spectre valve springs after satisfactory testing on No. 5 Unit.
| Identifier | ExFiles\Box 96\2\ scan0040 | |
| Date | 6th April 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} x354 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}14/KW.6.4.35. SpectreCodename for Phantom III Valve Springs. The double valve springs to Hs.{Lord Ernest Hives - Chair}1827/S have proved satisfactory on No. 5 Unit. Will you please put two more sets in hand, together with the necessary washers, etc. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||