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 showing engine power output and induction pipe depression against RPM for a long duration camshaft test.
| Identifier | ExFiles\Box 13\2\ 02-page123 | |
| Date | 5th August 1931 guessed | |
| CURVE I POWER OUTPUT LONG DURATION CAMSHAFT. CHINA UNIT 3.25 BORE. 116° CAMSHAFT 5-1 C/R ZENITH TRIPLE DIFFUSER CARB ON EXHAUST SIDE OF BLOCK B.H.P./LITRE 23.6 B.H.P. R.P.M. INDUCTION PIPE DEPN INS / Hg. TIMING DIAGRAM: EX 54 IN 48 7° .020 CL'CE. INLET DURATION 227 EXHAUST DURATION 235 | ||