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 for the R-R F.10 and F.11 engines with different compression ratios and fuels.
| Identifier | ExFiles\Box 36\2\ scan 135 | |
| Date | 13th August 1927 | |
| COMPARATIVE POWER CURVES 13. 8. 27 A.{Mr Adams} R-R.{Sir Henry Royce} F.10 (6 to 1 COMP RATIO) B. R-R.{Sir Henry Royce} F.11 (8 to 1 COMP RATIO) C/BHP CORRECTED HORSE - POWER R.P.M. [Curve B] HIGH COMPRESSION ENGINE FUEL:- AVIATION SPIRIT + 10ccs/GAL T.E.L. [Curve A] NORMAL COMPRESSION ENGINE FUEL:- AVIATION SPIRIT + 20 % BENZOL [Y-Axis] 600, 580, 560, 540, 520, 500, 480, 460, 440 [X-Axis] 2000, 2100, 2200, 2300, 2400, 2500 | ||