Photograph showing an original crankcase after a 34-hour test at 4,000 r.p.m.
| Identifier | ExFiles\Box 114\2\ scan0191 | |
| Date | 3rd October 1935 guessed | |
| Original Crankcase after 34 hours at 4,000 r.p.m. | ||
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).