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).
Test report on two Watford EO.6 magnetos finding them no better than the current standard.
| Identifier | ExFiles\Box 70\4\ scan0232 | |
| Date | 18th May 1927 | |
| EFC x8797 Mx{John H Maddocks - Chief Proving Officer}/McM3/T18.5.27. Watford EO.6. Magneto with enclosed armature tunnel. EFC4/T25.4.27 Further to our Mx{John H Maddocks - Chief Proving Officer}/McM12/T27.4.27. The chassis to which the remaining 2 magnetos were fitted have now completed their test, and we can report on the magnetos as follows - Mag. No.96129. This is no better than present magnetos. Brushes squeak, this would be termed "just passable". Mag No.961535 This again is no better than present standard as it would not pass owing to knocks. [Stamp: RECEIVED MAY 18 1927] Mx{John H Maddocks - Chief Proving Officer}/McM | ||