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).
Power output chart comparing two configurations of the C.10 Unit for 19 G.IV.
| Identifier | ExFiles\Box 102\5\ scan0113 | |
| Date | 1st December 1931 | |
| POWER OUTPUT C.10 UNIT FOR 19 G.IV R.M. 57 ① CAMSHAFT E.57177 110.5° PITSONS E.57122 COMPRESSION RATIO 5.7 - 1 Valve Timing Diagram: 26°, .020 CLCE, IN, EX, 35°, 45.5 Shaft Drawing: 1.6 INSIDE DIA, P II SHAFT TYPE, 1.5 DIA ② CHINA UNIT 5-1 C/R 1.7° LARGER R.R. CARB. 110° SHAFT. STD. 25 H.P. Ex SYSTEM TO E.55794 Y-Axis Left: B.H.P. Y-Axis Right: B.M.E.P. X-Axis: R.P.M. & 12 31 | ||