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).
Reporting that a thicker armature cover plate for Watford magnetos offers no quietness advantage.
| Identifier | ExFiles\Box 70\4\ scan0206 | |
| Date | 7th December 1926 | |
| EFC By Wd.{Mr Wood/Mr Whitehead} from Mx.{John H Maddocks - Chief Proving Officer} X8797 Mx{John H Maddocks - Chief Proving Officer}9/T7.12.26 X.8797. - THICKER ARMATURE COVER PLATE FOR WATFORD MAGNETOS. Reference your memo EFC5/T2.12.26 We have tried the thicker Armature Cover Plate on several magnetos, and from a quietness point of view, it does not appear to be any advantage over the standard plates. The cover plate and its pick-up is returned herewith. Mx.{John H Maddocks - Chief Proving Officer} | ||