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).
Specifications for the automatic advance of a Scintilla AM6-A Magneto with negative or anti-clockwise rotation.
| Identifier | ExFiles\Box 48\2\ Scan059 | |
| Date | 31th March 1924 | |
| X 4187 31.3.24. X.4187 - SCINTILLA AM6-A MAGNETO (NEGATIVE OR ANTI-CLOCKWISE ROTATION) AUTOMATIC ADVANCE. 34937 We find this magneto to Commence its automatic advance at 420 r.p.m. (magneto speeds and advances throughout) Attain an advance of 5° at 850 r.p.m. 10° at 1160 " 15° at 1600 " 20° at 1850 " 25° at 2180 " 30 at 2570 " and the maximum amount of:- 32½° at 2750 " Hand advance 20½° Automatic adv. 32½° Total advance 53° _______ EFC. {E. Fowler Clarke - Electrical Engineer} | ||