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).
Comparing the wear marks on a standard crankshaft with those on a Nitralloy shaft.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan090 | |
| Date | 30th June 1930 | |
| -2- Hs{Lord Ernest Hives - Chair}/L.S/31.6.30.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. Hs{Lord Ernest Hives - Chair}/L.Swindall. | ||