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).
Instructions regarding a dynamo re-closing voltage issue and the fitting of a replacement switch.
| Identifier | ExFiles\Box 59\1\ Scan239 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS.) (SH57-29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. 6 19 The rise of re-closing voltage at high dynamo speeds appears to be due to the fact that the dynamo cuts in again at these speeds and delivers a small output, this causing a change in control-brush potential and so reducing the effect of the extra coil. The switch has now been sent - for fitting to 8 EX (not using the extra coil) in place of cuto-switch B, an old type on the car at present. Signed F.J.A. This Sheet must be filed on completion of the work. | ||