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 power curves at 4,000' for a moderate supercharger engine using standard versus long duration camshafts.
| Identifier | ExFiles\Box 43\3\ Scan225 | |
| Date | 20th December 1928 | |
| RR F.XII-MS-113. MODERATE SUPERCHARGER ENGINE COMPARATIVE POWER CURVES AT 4,000' A.{Mr Adams} WITH STANDARD CAMSHAFTS B. WITH LONG DURATION CAMSHAFTS INCREASE IN HORSE-POWER OBTAINED +16 +27 HORSE-POWER CORRECTED TO 4,000' CONDITIONS CRANKSHAFT R.P.M. N.R.P.M. VH | ||