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 for R.R. Wound Lucas Dynamos, recording performance metrics over time.
| Identifier | ExFiles\Box 36\4\ scan 241 | |
| Date | 18th August 1921 | |
| X3014b Filed 18.8.21. X.3014b - R.R. WOUND LUCAS DYNAMO. Time | Amps | Volts | Temp. C | Speed --- | --- | --- | --- | --- Dynamo no 1646, armature 1646 2.0 | 11.5 | 16 | 46° | 1300 2.30 | 11.5 | 16 | 57° | 1340 3.0 | 12.0 | 16 | 63° | 1480 3.30 | 12.0 | 16 | [obscured] | 1520 4.0 | 11.5 | 16 | 64° | 1410 4.30 | 11.5 | 16 | 66° | 1410 Dynamo 1646, armature 1668 2.20 | 10 | 16 | 47° | 1290 2.50 | 8 | 16 | 51° | 1300 3.20 | 9 | 16 | 58° | 1410 3.50 | 9 | 16 | 60.5° | 1550 4.20 | 9 | 16 | 63° | 1570 Dynamo 1668, armature 1646 - | 12 | 16 | Cold | 1240 2.15 | 10.5 | 16 | 46° | 1480 2.45 | 11 | 16 | 53° | 1430 3.15 | 11 | 16 | 58° | 1500 3.45 | 10.5 | 16 | 63° | 1450 4.15 | 10.5 | 16 | 65° | 1430 Dynamo 1696, arm. 1696 10.15 | 12 | 16 | Cold | 1450 10.45 | 10.5 | 16 | 30° | 1360 11.15 | 10.5 | 16 | 42° | 1430 11.45 | 10.5 | 16 | 49° | 1470 12.15 | 10.5 | 16 | 52° | 1500 Dynamo 1674, arm. 1674 1.50 | 12.0 | 16 | Cold | 1360 2.20 | 12.0 | 16 | 39° | 1390 2.30 | 9.5 | 16 | 44° | 1280 2.50 | 10.5 | 16 | 52° | 1430 2.50 | 8.5 | 16 | 52° | 1230 3.20 | 10.5 | 16 | 57° | 1400 3.50 | 10.5 | 16 | 60° | 1410 4.20 | 10.5 | 16 | 65° | 1260 | ||