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 plotting necessary ignition advance against engine RPM for Lorraine and Lister Phantom engines.
| Identifier | ExFiles\Box 5a\5\ 05-page024 | |
| Date | 17th March 1927 | |
| ⑦ 17-3-27 Lister Phantom with Co. MODD TO L.E.G. 8889. One Ign. Two Igns. DEGREES ADVANCE BEFORE 'DC 50° 40° 30° 20° 10° LORRAINE. One Ign. Two Igns. LORRAINE-DIETRICH ENGINE. NECESSARY IGNITION ADVANCE. R.P.M of ENGINE 1000 1500 2000 2500 3000 | ||