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 log sheet for dynamos, recording voltage and amperage outputs under cold and warm conditions.
| Identifier | ExFiles\Box 51\1\ Scan108 | |
| Date | 10th October 1922 | |
| -2- | Date. | Dynamo number. | (2) Cold condition | (3) Output after 20 mins. at 1380 r.p.m. | (4) Warm condition | (5) (6) (7) Remarks. | |---|---|---:|---:|---:|---| | | | Temp. | O.C. volts. | Amperes. | Volts. | O.C. volts | | |---|---|---|---|---|---|---|---| | 26.8.22. | 12 | 18 | 10.5 at 560, 11.8 as shunt | 11.0 | 14.5 | 12.4 at 660 | Good generally. | | 1.9.22. | 13 | 18 | 13.3 at 600, 14.4 as shunt | 10.1 | 14.7 | 16.2 at 700 | " " | | 1.9.22. | 14 | 18 | 14.0 at 600, 14.2 as shunt | 10.5 | 14.7 | 16.7 " " | Sings. Brushes fair. | | 4.9.22. | 15 | 18 | 13.5 at 600, 14.0 as shunt | 10.0 | 14.7 | 16.5 " " | Good generally. Brushes excellent. | | 4.9.22. | 16 | 20 | 13.4 at 600, 14.6 as shunt | 10.7 | 14.7 | 16.0 " " | Good generally. | | 4.9.22. | 17 | 20 | 13.2 at 600, 13.8 as shunt | 11.0 | 14.8 | 16.5 " " | " " | | 6.9.22. | 18 | 18 | 13.2 at 1600, 14.2 as shunt | 10.8 | 14.7 | 16.0 " " | " " | | 7.9.22. | 19 | 20 | 13.0 at 600, 13.7 as shunt | 10.0 | 14.7 | 16.0 " " | Sings.Brushes fair. Control brush spring heavy.Drive taper smell. | | 8.9.22. | 20 | 20 | 13.8 at 600, 14.7 as shunt | 10.3 | 14.7 | 17.0 " " | Good generally. | | | 6EX | 16 | 11.5 at 600, 13.0 as shunt | 9.4 | 14.8 | 14.2 " " | Brushes O.K. Mechanically good. | | 10.10.22 | Demon. | 18 | 10.5 at 600, 12.2 as shunt | 10.0 | 14.7 | 13.0 " " | " " | EFC {E. Fowler Clarke - Electrical Engineer} + Left Margin Text: R.R. Ltd (SDep) CSD-12-17 M {Mr Moon / Mr Moore} /12-826 | ||