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 pressure face diameter reductions given by different standard cam forms.
| Identifier | ExFiles\Box 86\2\ scan0122 | |
| Date | 1st November 1933 guessed | |
| TAKEN AT 68° F.{Mr Friese} GRAPHS OF PRESSURE FACE DIAMETERS GIVEN BY STANDARD CAM FORMS. REDUCTION OF DIAMETER. MAJOR AXIS. DEGREES FROM MAJOR AXIS. Nº 10 CAM. Nº 12 CAM. Nº 14 CAM. Approx Position of R.R. bearing surface Y-Axis: .000", .001", .002", .003", .004", .005", .006", .007", .008" X-Axis: 9°, 18°, 27°, 36°, 45° | ||