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 valve lift curves and velocity against degrees of rotation.
| Identifier | ExFiles\Box 179\3\ img009 | |
| Date | 28th February 1929 guessed | |
| VELOCITY Valve Lift Curves DEGREES X-Axis: 45, 50, 55, 60, 65, 70, 75, 80 Y-Axis: 0, .001, .002, .003, .004, .005 Stamp: ROLLS-ROYCE LIMITED, PRINT ROOM, 29 FLAM... (partially illegible) | ||