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.
| Identifier | ExFiles\Box 92\2\ scan0024 | |
| Date | 25th September 1928 | |
| V431. COMPRESSION PRESSURES (SUPER SPORTS ENGINE). ENGINE No 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.{Mr Moon / Mr Moore} AV. AIR TEMP = 20°C. COMPRESSION PRESSURE (LBS. PER SQ. IN.). THE CURVE GIVES AVERAGE FIGURES FOR THE SIX CYLINDERS. R.P.M. OF ENGINE. | ||