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).
Engine lubrication tests and results.
| Identifier | ExFiles\Box 16\1\ Scan008 | |
| Date | 1st January 1907 guessed | |
| Engine Lubrication X740 1400 714 - found insufficient oil for full power (cat & fiddle) even at 20 lbs. Gudgeon pins made .002 slack with 1/2 groove 3/16 x .010". but too much oil running past engine - smoke stopped 1 lb pressure but big end seized (no 2). Gudgeon bushes from .002 slack - steel at 20 lbs no appreciable smoke but engine easy & slight smoke after running light. VP | ||