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 showing the required ignition advance range for an E.A.C.II engine at various speeds.
| Identifier | ExFiles\Box 65\1\ scan0018 | |
| Date | 27th August 1924 | |
| E.A.C.II. Gr{George Ratcliffe} I Maximum Minimum ENGINE DEGREES B.D.P. B.D.P. A.D.P. ENGINE SPEED. R.P.M. CURVES SHOWING THE IGNITION ADVANCE REQUIRED ON E.A.C.II ENGINE. (FIGURES SUPPLIED BY Hs.{Lord Ernest Hives - Chair}) 22-8-24 THE CURVES DEFINE THE LIMITS OF IGNITION RANGE, AS EXPERIMENTALLY DETERMINED, OVER WHICH MINIMUM POWER IS PRACTICALLY MAINTAINED AT EACH SPEED. H.E.W. 26-8-24 E.T.C. 27/8/24 | ||