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).
Comparison of wear marks on a standard crankshaft versus a Nitralloy crankshaft.
| Identifier | ExFiles\Box 103\3\ scan0005 | |
| Date | 31th August 1931 | |
| -2- He/L.S./31.8.31.Contd. A standard crankshaft, no matter how little running it has had, has slight groove marks running round shaft in same plane as oil feed holes but with the Nitralloy shaft there was no sign of this marking. He/L.Swindall. | ||