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 of compression pressures for a Super Sports Engine at various RPMs.
| Identifier | ExFiles\Box 19\7\ Scan121 | |
| Date | 25th September 1928 | |
| V4 COMPRESSION PRESSURES (SUPER SPORTS ENGINE). ENGINE Nọ SS{S. Smith}-3. (COMPRESSION RATIO. 4·5). CLAUDEL-HOBSON CARBURETTOR. HOT-SPOT IN ACTION (WATER @ 75°C). 116° CAMSHAFT. FULL BED EXHAUST SYSTEM FULL THROTTLE. BAR = 764.5 m/m AV. AIR TEMP = 20°C. COMPRESSION PRESSURE (LBS. PER SQ. IN). R.P.M. OF ENGINE. THE CURVE GIVES AVERAGE FIGURES FOR THE SIX CYLINDERS. | ||