Cross-section drawing of a piston and connecting rod assembly with dimensional annotations.
| Identifier | ExFiles\Box 66\1\ scan0181 | |
| Date | 19th October 1928 guessed | |
| 2.75" approx varies with compression ratio. 4.250 | ||
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).