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 and test results for a dynamo, detailing its temperature and electrical characteristics.
| Identifier | ExFiles\Box 51\1\ Scan247 | |
| Date | 6th November 1918 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. 3 The dynamo was next mounted normally on its rig and run (open-circuited) at such a speed that it maintained itself at a temperature of 75°c (ambient temp'r 20°c), by thermometer. This speed was found to be 1050 rpm, when the main volts were, 28; the field volts, 18; field amps, 5.3; field ohms, 3.4; & field temperature by resistance 96.5°c. The ambient temperature was 20°c. The cold field resistance is taken as 2.6 w at 18°c. H J Allen This Sheet must be filed on completion of the work. | ||