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).
Extract discussing the need for extra piston rings to overcome rattles and improve gas tightness.
| Identifier | ExFiles\Box 74\3\ scan0078 | |
| Date | 13th February 1920 | |
| x.858 Extract from No. 13.2.20. x.2448 - Re Piston Rattles. x.858 (5) Apart from overcoming piston rattles we need the extra rings to improve gas tightness of the pistons. | ||