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 the ignition advance curve versus speed for a B.23.A.E. deturbulated head with a 6.5-1 compression ratio.
| Identifier | ExFiles\Box 82\4\ scan0283 | |
| Date | 24th April 1936 guessed | |
| IGNITION CURVE B.23.A.E. HEAD DETURBULATED. C/R 6.5-1. DEGREES ADVANCE B.T.D.C. M.P.H. ROAD FIGURE OF IG: AGLE JUST TO AVOID DETONATION. HEAD CLEAN SHELL N°1 PETROL. PRELIMINARY DELCO REMY CURVE. | ||