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).
Requesting an alteration to the lower speed sparking figures for Watford EW6 magnetos.
| Identifier | ExFiles\Box 65\3\ scan0369 | |
| Date | 17th May 1929 | |
| X7791 To BY/CS. from EFC. EFC3/T17.5.29. WATFORD EW6 MAGNETOS. With reference to E.77481 of the standard EW6 magneto, would you please have the lower speed sparking figures altered to the following:- Fully advanced....... 120 r.p.m. Central ............ 160 r.p.m. Fully retarded ...... 190 r.p.m. in order to bring these into line with our revised specification of test for these machines. EFC. | ||