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).
Communication regarding the testing and performance of different electrical coils and tremblers.
| Identifier | Morton\M3.3\ img027 | |
| Date | 24th February 1920 | |
| Contd. -4- was about 9,500, showing a rather higher frequency than the six volt. Coil No.6384, now sent to you works fairly well and at the best setting works at a minimum current 1.0 amp. (Cond 1.1 amp. on 6 volts) on four volts, and vibrates at 11,000 per minute. The regularity is fairly good but the coil, owing to producing sparks at a greater frequency, is really more suitable now for 6 volts than 4, with this trembler. We have another six volt coil No.6165 with a trembler of another pattern illustrated in your R10/W15.8.17; This coil we shall be putting into order for experimental tests. We hope to let you have some more information re the working of these various coils and tremblers in due course. Ck.{Mr Clark} | ||