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 data for a Lucas [5]75 Dynamo, model R1869, detailing amperes and volts at various speeds.
| Identifier | ExFiles\Box 36\4\ scan 104 | |
| Date | 29th July 1920 | |
| RR 360 (1203) (SF 349 24-1-19) MP 200552 91083 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To S.F.C. Order No Re X.3014B Customer's No. 113148 29/7/20 19 Lucas [5]75 Dynamo. R1869 Control brush Normal. 75°C. Speed | Amperes | Volts. 745 | 0 | 13.6 790 | 1.4 | 13.75 850 | 3.0 | 13.85 950 | 5.3 | 14.1 1030 | 6.8 | 14.25 1170 | 8.2 | 14.5 1280 | 10.2 | 14.55 1370 | 11.0 | 14.7 1650 | max 12.3 | 14.9 1560 | 12.0 | 14.7 1860 | 12.1 | 14.8 2080 | 12.2 | 14.9 2220 | 11.6 | 14.7 Signed (Cont-d) This Sheet must be filed on completion of the work. | ||