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).
Note recommending an endurance test on another set of pistons due to comments about tight top rings.
| Identifier | ExFiles\Box 160\3\ scan0095 | |
| Date | 24th January 1939 guessed | |
| SWDC. File 1379 In view of the Comments re top rings being tight in their grooves, we ought to run an endurance on another set of these pistons. Rm{William Robotham - Chief Engineer} | ||