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).
The availability of a tested S.E.V. Double Spark Magneto for engine experiments.
| Identifier | ExFiles\Box 50\2\ Scan194 | |
| Date | 9th January 1924 | |
| X. 4334 To Hs. {Lord Ernest Hives - Chair} from EFC. {E. Fowler Clarke - Electrical Engineer} EFC {E. Fowler Clarke - Electrical Engineer} 3/T9.1.24. X. 4334 - S.E.V. DOUBLE SPARK MAGNETO. Should it be required at any time in any of your engine experiments to produce two synchronised ignition sparks, this is to remind you that we have in working order (tested) an S.E.V. double spark magneto. EFC. {E. Fowler Clarke - Electrical Engineer} | ||