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 bench and chassis testing of experimental Watford EW6A magnetos.
| Identifier | WestWitteringFiles\T\2July1929-December1929\ Scan063 | |
| Date | 30th September 1929 | |
| To R.{Sir Henry Royce} from EFC. c. Sg.{Arthur F. Sidgreaves - MD} c. Ry. E.{Mr Elliott - Chief Engineer} c. DA.{Bernard Day - Chassis Design} Wor.{Arthur Wormald - General Works Manager} Mx.{John H Maddocks - Chief Proving Officer} ORIGINAL EFCL/AD30.9.29. X.7792. WATFORD EW6A MAGNETOS. X7792 Reference of previous report EFCL/AD20.7.29. Precis of previous report. Six experimental magnetos of 6° increased range to 66° and still better low speed performance had been received and tested, the better low speed performance being the result of our explanation to Messrs. North of the better application of the fundamental principles of the magneto. The results of preliminary bench tests and chassis tests were generally very satisfactory, showing good improvement, an exception evident on the bench test being the slight inconsistency from machine to machine at high speeds in the fully advanced position. The machines were fitted with special ventilated contact breaker covers with a view to minimising the burning away of the platinum points, which Messrs. North maintained had been due to hydro carbon vapours. We were satisfied that the amount of contact breaker noise was not increased. There is now further to report concerning these machines. The experimental testers have been very pleased with the operation of these machines on chassis, and in fact, we know of no complaint from them during the two or | ||