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).
Graph of the exhaust valve displacement curve with 2 m.m. clearances.
| Identifier | ExFiles\Box 180\M4\M4.2\ img037 | |
| Date | 10th March 1924 guessed | |
| EXHAUST VALVE DISPLACEMENT CURVE. WITH 2 m.m. clrs. MAX LIFT .391. BOTTOM CENTRE TOP CENTRE 130 170 210 250 290 330 360 | ||