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).
Directive on the material and clearance for Spectre front suspension shock damper pistons.
| Identifier | ExFiles\Box 95\3\ scan0148 | |
| Date | 5th September 1935 | |
| +346 To RHC.{R. H. Coverley - Production Engineer} c. to Hy.{Tom Haldenby - Plant Engineer} c. to Da.{Bernard Day - Chassis Design} Hs{Lord Ernest Hives - Chair}/Les.15/KW.5.9.35. SpectreCodename for Phantom III Front Suspension. In view of the condition of the cast iron shock damper pistons from the bumper chassis after 125 hours' running, will you please arrange that all further supplies of these pistons are produced from this material. The diametrical clearance used has been .002". Although this material is the best we have tried, we cannot hope to be entirely free from piston seizures until we are using the Autolock shock damper construction, N.Sch.4520. Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} | ||