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).
Adoption of Magnaflux testing for valve springs.
| Identifier | ExFiles\Box 158\5\ scan0009 | |
| Date | 8th February 1939 | |
| 1360 To By.{R.W. Bailey - Chief Engineer} from Rm.{William Robotham - Chief Engineer} c. Cgh{W Clough}/EM. Rm.{William Robotham - Chief Engineer}4/MH.{M. Huckerby}8.2.39. We see that the Americans are now using "Magnaflux" testing of valve springs. This seems to us to be an excellent way of detecting faults, and we are wondering whether we cannot undertake this test on our own springs. Rm.{William Robotham - Chief Engineer} | ||