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).
Micro-examination report on a Rover valve spring, noting its partial decarburisation.
| Identifier | ExFiles\Box 127\3\ scan0150 | |
| Date | 24th November 1936 | |
| 1091 Micro-Examination Report. M.1228. To Rm.{William Robotham - Chief Engineer} HL1/AC.24.11.36. Laboratory. RE: ROVER VALVE SPRING. (Your ref: Rm{William Robotham - Chief Engineer}/AP.16.11.36.) This is not similar to the Vauxhall Spring. It is partially decarburised, so that there is a thin network of ferrite at the surface. H1. HE | ||