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 manufacture Spectre Bottom Tappets from three different specified materials for testing purposes.
| Identifier | ExFiles\Box 96\2\ scan0028 | |
| Date | 26th February 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} +354 Hs{Lord Ernest Hives - Chair}/Smth.6/KW.26.2.35. SpectreCodename for Phantom III Bottom Tappets. We wish to try some tappets made of different materials from the camshaft, and should like you to put in hand the following pieces :- 6 off. Stellite faced 0.6 carbon steel. 6 off. Cast iron. BY/EM suggests we use Mark III. hardening quality C.I. from the Sheepbridge-Stokes Casting Co. 6 off. Low carbon, case hardening mild steel. Hs{Lord Ernest Hives - Chair}/Smth. | ||