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).
Continuation page mentioning gain due to a 112º camshaft and higher compression.
| Identifier | ExFiles\Box 92\2\ scan0099 | |
| Date | 25th August 1930 | |
| -4- Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/LH.{Mr Haworth}25.8.30. Contd. gain due to the 112º camshaft and higher compression. | ||