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 showing power output results from Bentley single-cylinder engine tests comparing different configurations.
| Identifier | ExFiles\Box 134\2\ scan0026 | |
| Date | 23th April 1957 guessed | |
| BENTLEY SINGLE CYLINDER TESTS. SHEET 4 V 1747 POWER OUTPUT WITH BENTLEY TIMING, (HIGH POWER HEAD) HIGH POWER CYLINDER & HEAD TO L.E.C. 4075 SINGLE INLET VALVE 1.750 DIA. ZENITH CARBURETTOR (36% CHOKE) COMPRESSION RATIO = 6.17 OPEN EXHAUST FUEL = DTD 224 NORMAL BENTLEY VALVE TIMING: I.O 4°E I.C. 51°L E.O. 51°E E.C. 7°L EXHAUST VALVE 1.400 DIA DITTO - 1.500 DIA STANDARD BENTLEY 32 m/m CHOKE C.R. = 6.40 Y-AXIS (LEFT): BRAKE HORSE POWER Y-AXIS (RIGHT): B.M.E.P. (LBS/SQ. IN.), SP.{Mr Spinney} FUEL CONS. (PTS/BHP/HR) X-AXIS: R.P.M. | ||