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).
List of temperature-related clearance and expansion settings for a Bentley 25/30 model.
| Identifier | ExFiles\Box 96\2\ scan0134 | |
| Date | 4th September 1936 guessed | |
| Bentley a 25/30. water up to 60°C as quickly as possible relative to cold setting clearance increases. + .002 water and oil up to 60°C, relative to cold setting + .001 (1) Expansion with KE.965 valves .007 (2) Expansion with S/SLV. .005 Necessary cold setting with (1) .006 Necessary " " (2) .004 | ||