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).
Comparative power curves for a fully supercharged engine at 10,500 feet, comparing standard and long duration camshafts.
| Identifier | ExFiles\Box 43\3\ Scan222 | |
| Date | 20th December 1928 | |
| R.R. FXII-S-105. FULL SUPERCHARGED ENGINE. COMPARATIVE POWER CURVES AT 10,500' A WITH STANDARD CAMSHAFTS B WITH LONG DURATION CAMSHAFTS INCREASE IN HORSE-POWER OBTAINED +5 +7 +11 HORSE-POWER CORRECTED TO 10,500' CONDITIONS CRANKSHAFT R.P.M. --N.RPM-- V.H. | ||