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).
Performance data for a Scintilla Type AM6-A magneto with automatic advance.
| Identifier | ExFiles\Box 48\2\ Scan040 | |
| Date | 30th January 1924 | |
| X.4187. 30.1.24. X.4187 - SCINTILLA TYPE AM6-A MAGNETO. 26485 (AUTOMATIC ADVANCE) We find this magneto to Commence its automatic advance at 270 r.p.m. (magneto speeds and advances throughout) Attain an advance of 5° at 800 r.p.m. " " " " 10° " 1160 " " " " " 15° " 1600 " " " " " 20° " 1900 " " " " " 25° " 2250 " " " " " 30° " 2750 " and the maximum amount of 33° at 3300 r.p.m. Hand advance = 20° Automatic advance = 33° Total advance = 53° __________ E.T.C. EFC. {E. Fowler Clarke - Electrical Engineer} | ||