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).
Test results for the Scintilla Magneto AG.6/A, detailing its automatic advance curve.
| Identifier | ExFiles\Box 48\2\ Scan026 | |
| Date | 19th January 1923 | |
| X.4787. 19.1.23. SCINTILLA MAGNETO AG.6/A. (AUTOMATIC ADVANCE). We find this magneto to Commence its automatic advance at 500 r.p.m. (Magneto speeds and advances throughout). Attain an advance of 6° at 1150 r.p.m. " " " " 12° at 1620 r.p.m. " " " " 18° at 2000 r.p.m. " " " " 24° at 2420 r.p.m. " " " " 30° at 2910 r.p.m. and the maximum amount of 32 1/2° at 3600 r.p.m. Hand advance 17.5° Total 50°. EFC. {E. Fowler Clarke - Electrical Engineer} | ||