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 experimental routine testing of a magneto, comparing its performance characteristics with other models.
| Identifier | ExFiles\Box 48\2\ Scan087 | |
| Date | 9th May 1924 | |
| -4- Contd. EFCl/T9.5.24. This magneto was also put through our experimental routine tests, with results recorded below, after which it has been fitted to EAC.III. chassis 93-NK and has done 453 miles to date. It will be seen from the results recorded below that the performance characteristics of this machine are rather better than those of the previous similar machine but of opposite rotation. The experimental routine bench test results for the two machines, each of type AM-6-A (No.26485 + rotation and No.34937 - rotation), in comparison with similar results for a present standard Watford E.O.6, are as follows :- (1) Weight of each Scintilla magneto, slightly over 12.5 lbs. (2) " " Watford EO6 - 12.8 lbs. the weights, therefore, being practically identical. (2) The observed hand, automatic, and total advances of the three machines, are as follows :- Hand. Automatic. Total. Scintilla AG-6-A. {Mr Adams} 17.5º 32½º 50º " AM-6-A. {Mr Adams} No.26485. 20º 33º 53º " AM-6-A. {Mr Adams} No.34937. 20.5º 32.5º 53º (The total advance (hand only) of the EO6 Watford machine is 33º. (More, up to 60º can be made available, but actually only 28º is required on the present standard 40/50.) The quietness of the Scintilla magneto is quite reasonable, and probably somewhat better than the standard EO6, but for analysis of existing noise, see report WA. {Mr Wallis} 11 attached. Contd. | ||