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 against engine RPM for a Super Sports Engine.
| Identifier | ExFiles\Box 65a\2\ scan0064 | |
| Date | 25th September 1928 | |
| V431. 104 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.) R.P.M. OF ENGINE. THE CURVE GIVES AVERAGE FIGURES FOR THE SIX CYLINDERS. | ||