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 table for the Lucas E.575 Dynamo.
| Identifier | ExFiles\Box 36\4\ scan 011 | |
| Date | 8th April 1920 | |
| X.3014b. - LUCAS E.575 DYNAMO. X.1627. TEST TABLES. Dynamo number. | (2) Cold condition. temp. (°C) at 625 RPM. | Volts | (3) Output amperes after 20 min: at 1750 R.P.M. | Volts. | (4) Warm condition O C volts at 715 R.P.M. | (5) & (6) Remarks. ---|---|---|---|---|---|--- R.1293 | 18 | 12.2 | 13.0 | 13.9 | 13.1 | No appreciable brush sparking at 300 R.P.M. R.1276. | 16 | 12.9 | 12.5 | 14.1 | 14.5 | Electrical and mechaninal noise reasonable. R.1331. | 16 | 13.2 | 11.9 | 13.5 | 14.3 | R.1318. | 18 | 12.8 | 11.5 | 13.7 | 14.5 | R.1223. | 17 | 13.0 | 12.3 | 13.8 | 14.2 | Mechanical balance good in all cases. R.1322. | 17 | 13.0 | 11.7 | 13.9 | 14.6 | | ||