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).
Blueprint graph comparing ignition advance curves for a Lighter Phantom engine up to LEC 2230.
| Identifier | ExFiles\Box 37\1\ scan 311 | |
| Date | 6th May 1927 guessed | |
| X59441 IGNITION ADVANCE FOR LIGHTER PHANTOM TO LEC 2230 (BOTH IGNITIONS BEING SYNCHRONISED) DEGREES ADVANCE ON FLYWHEEL A PRESENT COMPROMISE REQD CURVE 13° M&B 1" M M1° 13°B M1° 8.25° B THIS CURVE IS BETTER FOR ANTI DETONATING REQD CURVE PROPOSED 10° M&B 2° M&B M2° 8°B M2° 16°B R.P.M. OF ENGINE Y-Axis: 10°, 20°, 30°, 40° X-Axis: 500, 1000, 1500, 2000, 2500 | ||