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 design specifications for 'Spectre' front road springs.
| Identifier | ExFiles\Box 95\3\ scan0037 | |
| Date | 15th October 1934 | |
| x444 366 To RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}9/KW.15.10.34. SpectreCodename for Phantom III Road Springs. We send you herewith Hs.{Lord Ernest Hives - Chair}1557/8 showing 7" deflection SpectreCodename for Phantom III front road springs. We have used marked up blue prints so that the type of grinding for the end coils is unaltered. Since the important feature of these springs is the rating, we suggest that Salters are told the free length, rating, the spigot diameters, and the fact that one spring must be capable of going inside the other. They can then choose the number and type of end coils. We want to avoid their altering the free length in order to get the load specified on the drawing. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||