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).
Testing of a Watford EW.6 Magneto, found satisfactory apart from a noisy make and break.
| Identifier | ExFiles\Box 65\3\ scan0160 | |
| Date | 11th January 1928 | |
| EFC. from Mx.{John H Maddocks - Chief Proving Officer} X7791 Mx{John H Maddocks - Chief Proving Officer}/McM1/T11.1.28. re Watford EW.6. Magnetos In reply to your EFC4/T20.12.27 and EFC4/T9.1.28, we have tried Magneto No.100081 on chassis, and consider it satisfactory except for a noisy make and break. Magneto returned herewith. Mx{John H Maddocks - Chief Proving Officer} | ||