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 with a data table for speed, voltage, amperage, resistance, and temperature.
| Identifier | ExFiles\Box 51\1\ Scan246 | |
| 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. Z increased to 86.5 oC before falling. The table below gives the average results, together with the temperature of the field winding as deduced from its resistance. It was found that lifting the negative brush, had no effect on the results. | Speed rpm | Main volts | Field volts | Field amps | Field ohms | Field temp'r oC | |---|---|---|---|---|---| | 725 | 15.2 | 10.0 | 2.8 | 3.57 | 114.0 | | 960 | 23.0 | 15.3 | 4.1 | 3.73 | 129.2 | | 1035 | 26.5 | 17.5 | 4.65 | 3.76 | 132.5 | | 1325 | 37.0 | 24.3 | 6.3 | 3.86 | 140.0 | | 1540 | 45.5 | 30.0 | 7.7 | 3.9 | 146.0 | | 1810 | 55.5 | 36.5 | 9.2 | 3.97 | 153.0 | | 2000 | 63.0 | 41.0 | 10.3 | 3.98 | 154.0 | (cont'd) Signed_________________ This Sheet must be filed on completion of the work. | ||