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 showing valve lift and acceleration data for inlet and exhaust.
| Identifier | ExFiles\Box 179\3\ img007 | |
| Date | 29th February 1932 guessed | |
| EXHAUST INLET LIFT ACCELERATION - ins. PER div PER div .008 .007 .006 .005 .004 .003 .002 | ||