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).
Improvements to cylinder head design, specifically regarding flame travel and breathing capacity.
| Identifier | ExFiles\Box 133\2\ scan0110 | |
| Date | 8th December 1934 guessed | |
| 2. 3. Longer flame travel, although this is mitigated to some extent by firing the hot gas under the exhaust valve first as in our ramp head. However, we are again reviewing the cylinder head problem with a view to improving breathing capacity without sacrificing our compact turbulent type of head. E/PSN. | ||