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).
Gains from a 112-degree camshaft and higher compression.
| Identifier | ExFiles\Box 32\5\ Scan245 | |
| Date | 25th August 1930 | |
| -4- He/ms.7/sl.25.8.30.Contd. gain due to the 112° camshaft and higher compression. | ||