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 versus RPM for a Super Sports Engine.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan092 | |
| Date | 25th September 1928 | |
| V431. COMPRESSION PRESSURES (SUPER SPORTS ENGINE) 25-9-28 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 = 764.5m/m.{Mr Moon / Mr Moore} AV. AIR TEMP = 20°C. COMPRESSION PRESSURE (LBS. PER SQ. IN.) 104 100 96 92 88 84 THE CURVE GIVES AVERAGE FIGURES FOR THE SIX CYLINDERS. R.P.M. OF ENGINE. 1000 1500 2000 2500 3000 | ||