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).
Performance graph comparing different camshafts on a 'Japan' engine model, plotting Brake Horse Power and Brake Mean Effective Pressure against RPM.
| Identifier | ExFiles\Box 56\2\ Scan170 | |
| Date | 21th May 1930 | |
| CAMSHAFT COMPARISONS ON "JAPAN" V868. TWIN ZENITH CARBS - 26 M/M CHOKES. SMALL INDN PIPE (1.25 INT. DIA) 5.25/1 COMPN RATIO. OPEN EXHAUST. B.H.P. (CORRECTED FOR TEMP & PRES.) B.M.E.P. lbs/□" R.P.M. B.H.P. B.M.E.P. 112° CAMSHAFT 116° CAMSHAFT 110° CAMSHAFT VALVE BOUNCE HERE 112° CAMSHAFT LONG DURN. 116° CAMSHAFT LONG DURN. 110° CAMSHAFT SHORT DURN (AS USED ON STD "CHINA") ach 21-5-30. | ||