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).
Fitting a Scintilla Magneto type AM-6-A to chassis 93-NK and its performance characteristics.
| Identifier | ExFiles\Box 48\2\ Scan147 | |
| Date | 18th July 1924 | |
| X 4187 18.7.24. Hs {Lord Ernest Hives - Chair} /GWH. {George W. Hancock - Head Chateauroux} X.4187 - SCINTILLA MAGNETO TYPE AM-6-A, No.28531. (Negative rotation). Will you please arrange to have the above magneto fitted to chassis 93-NK. The low speed sparking we found to be not quite as good as the Watford EO6 but otherwise the machine is O.K. We will arrange to send you later a photostat showing the amount of automatic advance at various engine speeds. Total range 51° Hand " 19° Automatic " 32° Magneto herewith. E7C / HEW. | ||