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).
Diagram illustrating the drilling positions for pump and camshaft wheel coupling flanges.
| Identifier | ExFiles\Box 183\M22\ img209 | |
| Date | 14th October 1922 guessed | |
| (2) to drill a number of holes in the coupling flanges of both the pump and the camshaft wheel, taking advantage of the fact that there are six humps in one revolution of the camshaft. This is illustrated below:- 12 POSITIONS IN STEPS OF 5° RELATIVE TO ONE OF THE 6 HUMPS ON THE CAMSHAFT (READING ALWAYS IN THE SAME DIRECTION) ARE GIVEN BY THE DRILLINGS SHOWN ABOVE IN THE COUPLING FLANGES. | ||