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 comparing engine performance (BHP and BMEP) with different camshafts on the 'Japan' engine configuration.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan056 | |
| Date | 21th May 1930 | |
| 6 8 CAMSHAFT COMPARISONS ON "JAPAN" V868. TWIN ZENITH CARBS - 26 M/M CHOKES. SMALL IND'N PIPE (1.25 INT. DIA) 5.25/1 COMP'N RATIO. OPEN EXHAUST. B.H.P. (CORRECTED FOR TEMP & PRESS.) B.M.E.P. lbs/[]" R.P.M. B.M.E.P. B.H.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") aelt. 21.5.30. Left Y-Axis: 90, 80, 70, 60, 50, 40, 30, 20, 10 Right Y-Axis: 120, 110, 100, 90, 80, 70 X-Axis: 500, 1000, 1500, 2000, 2500, 3000, 3500 | ||