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 Lucas E.575 and X.1627 dynamo models.
| Identifier | WestWitteringFiles\D\May1920\ Scan34 | |
| Date | 8th April 1920 | |
| X.3014b.-LUCAS E.575 DYNAMO. X.1627. TEST TABLES. Dynamo number | (2) Cold condition Temp. (°C) | (2) O.C. volts at 625 RPM. | (3) Output in amperes after 20 minutes at 1750 RPM. | (3) Volts. | (4) Warm condition O.C. volts at 715 RPM. | (5) & (6) Remarks. ---|---|---|---|---|---|--- R.1276 | 16 | 12.9 | 12.5 | 14.1 | 14.5 | No appreciable R.1318 | 18 | 12.8 | 11.5 | 13.7 | 14.5 | brush sparking at 3000 r.p.m. R.1223 | 17 | 13.0 | 12.3 | 13.8 | 14.2 | Electrical and mechanical noise reasonable. R.1331 | 16 | 13.2 | 11.9 | 13.5 | 14.3 | Mechanical balance R.1322 | 17 | 13.0 | 11.7 | 13.9 | 14.6 | good in all R.1293 | 18 | 12.2 | 13.0 | 13.9 | 13.1 | cases. A W.R. & S. 3397 (100 L) (2) C. 242 18-3-20) C. 5018 | ||