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).
Photograph showing cracks on the rear face of a Bentley main thrust bearing after test rig running.
| Identifier | ExFiles\Box 115\3\ scan0263 | |
| Date | 21th July 1938 guessed | |
| BENTLEY MAIN BEARINGS. Note Cracks on Rear Face of Thrust Bearing After 9½ Hours' Running on Test Rig. | ||