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).
Valve timing and clearances specifications for a 6-cylinder engine camshaft.
| Identifier | ExFiles\Box 21\2\ Scan077 | |
| Date | 27th February 1930 | |
| H.M. 2870. 110 M/M BORE. 6 CYL. C.R. 5.0. VALVE TIMING. CLEARANCES. IN. .019" EX. .004" FOR RUNNING, IN. .019" EX. .006" CAMSHAFT. E.{Mr Elliott - Chief Engineer} 3578. CYL.No. | 1 | 2 | 3 | 4 | 5 | 6 I.O | 20 M/M.{Mr Moon / Mr Moore} | 22 M/M.{Mr Moon / Mr Moore} | 24 M/M.{Mr Moon / Mr Moore} | 24 M/M.{Mr Moon / Mr Moore} | 24 M/M.{Mr Moon / Mr Moore} | 22 M/M.{Mr Moon / Mr Moore} E.C | 22 M/M.{Mr Moon / Mr Moore} | 24 M/M.{Mr Moon / Mr Moore} | 26 M/M.{Mr Moon / Mr Moore} | 28 M/M.{Mr Moon / Mr Moore} | 32 M/M.{Mr Moon / Mr Moore} | 33 M/M.{Mr Moon / Mr Moore} I.O. | 5.5° | 6.0° | 6.5° | 6.5° | 6.5° | 6.0° E.C. | 6.0° | 6.5° | 7.25° | 8.5° | 10.5° | 10.6° INLET PHASE NO. 4. I.O. 24 M/M B.T.D.C. = 6.5° B.T.D.C. I.C. 58 M/M B.D.C. 146. = 44.5° A.B.D.C. TOTAL PHASE = 231° DRAWING = 235°. SHORT 4.0° 27/2/30. | ||