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).
Instructions for modifications to self-adjusting tappets for the Spectre project.
| Identifier | ExFiles\Box 96\2\ scan0016 | |
| Date | 12th December 1934 | |
| To RHC.{R. H. Coverley - Production Engineer} 4694 354 Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}5/KW.12.12.34. SpectreCodename for Phantom III. The set of self-adjusting tappets which you are fitting to No. 3 unit and which are to the specification Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}1/KW.6.9.34, requires the following modification to bring up to date with the tests carried out on the test bed unit - Plungers modified from Hs.{Lord Ernest Hives - Chair}1497 to Hs.{Lord Ernest Hives - Chair}1651, which gives an increased diametrical clearance from .0005" to .0015". The rocker shafts are to Hs.{Lord Ernest Hives - Chair}1567. Will you also produce a set for No. 2 unit to the above instructions. Hs{Lord Ernest Hives - Chair}/L.H.Swindall. | ||