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).
Graph comparing the short-circuit ampere-speed curves of various magnetos.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan174 | |
| Date | 19th April 1928 | |
| SHORT CIRCUIT AMPERE - SPEED CURVES OF VARIOUS MAGNETOS WITH THE AMPERES EXPRESSED AS A PERCENTAGE OF THE VALUE AT 3200 R.P.M. PERCENTAGE SPEED (R.P.M) REF. NO. MAGNETO 1. WATFORD. EOG. NO.73972. 2. " " NO.82558. (L.A.C) 3. " " EWG NO.100081. 4. " " " " NO.99171. 5. LUCAS. ERG. NO.51. 6. " " " " NO.548. 7. B.T.H. FMG. NO.356147. 8. SCINTILLA. AMGA. No.34937. 9. " " GNG. NO.57927. 10. R.BOSCH. FU6R. NO.31859. 11. CONNER. CM1. NO.8263. 12. SIMMS. SR6L. NO.127505. 13. WATFORD. ROI. NO.93284. | ||