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).
Test results for electrical system adjustments at various engine speeds.
| Identifier | ExFiles\Box 59\1\ Scan238 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To__________________________________________________________19 Order No.____________________ Customer's No. 5 With the points open the machine cut in (14.0 volts) at 2000 rpm (38 mph) and lit a side-lamp at 17.0 volts at 2600 rpm (50 mph). The extra coil was now put in action and the switch re-adjusted to the following:- Volts to open. 16.6 Open circuit 17.0 On battery 750 rpm 17.4 " " 1000 " 17.8 " " 1600 " 18.0 " " 2000 " 18.2 " " 3000 " Volts to close. 13.7 Dynamo standing 13.2 " at 1000 rpm 12.6. " " 1500 " 12.0 " " 2000 " 12.4 " " 2500 " 12.6 " " 3200 " (Cont-d) Signed____________________ This Sheet must be filed on completion of the work. | ||