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).
The testing of a Watford E.O.6 type Magneto No.99158, previously reported as faulty.
| Identifier | ExFiles\Box 48\2\ Scan356 | |
| Date | 5th October 1927 | |
| EFC. {E. Fowler Clarke - Electrical Engineer} c.c to Mr Swift/Mr Ellis. X.8796 ROY {Sir Henry Royce} /JT12/HP5.10.27. Watford E.O.6 type Magneto No.99158. This is the magneto referred to in yours EFC {E. Fowler Clarke - Electrical Engineer} 3/T5.9.27 and EFC {E. Fowler Clarke - Electrical Engineer} 2/T14.9.27 as having completely failed to spark. Messrs. North & Sons have duly examined this machine and report that same was found to be sparking O.K. on their tests at all speeds. The magneto has been dissembled, all parts tested electrically, and the magneto submitted to a four hours duration test on re-assembling. As the magneto has stood up to these tests satisfactorily they are returning same to us without further delay. ROY. {Sir Henry Royce} | ||