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).
Tests on modified rings and the trial of three-ring pistons.
| Identifier | ExFiles\Box 144\3\ scan0081 | |
| Date | 9th July 1936 | |
| Contd:-2- HY{Tom Haldenby - Plant Engineer}6/T9.7.36 contd: Rm.{William Robotham - Chief Engineer} has tests in hand with a view to effecting improvement by means of modified rings, but there is nothing which can be confidently recommended at present. After our discussion today we have put in hand three-ring pistons as at present, but with the rings pinned for trial. Rm.{William Robotham - Chief Engineer} has promised to reply to C5/G3.7.36. HY.{Tom Haldenby - Plant Engineer} | ||