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).
Graphs showing ignition advance against compression ratio and engine speed for a turbulent head engine.
| Identifier | ExFiles\Box 133\2\ scan0165 | |
| Date | 1st July 1932 | |
| RICARDO & Co Engineers (1927) LTD., BRIDGE WORKS ENGINE TESTING LABORATORY. DRG No D4312 DATE 1-7-32 FILE Single Cyl. tests IGNITION ADVANCE FOR TURBULENT HEAD. RATE OF PRESSURE RISE 30 LBS/SQ IN PER DEGREE. Top Graph: IGNITION ADVANCE AT 1000 R.P.M. COMPRESSION RATIO Y-Axis: CRANKSHAFT DEGREES IGNITION ADVANCE BEFORE T.D.C. Bottom Graph: IGNITION ADVANCE AT VARIOUS SPEEDS COMPRESSION RATIO 5. R.P.M. Y-Axis: CRANKSHAFT DEGREES IGNITION ADVANCE BEFORE T.D.C. | ||