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).
Production test report for 48 coil medium output dynamo machines.
| Identifier | ExFiles\Box 62\3\ scan0157 | |
| Date | 23th January 1931 | |
| X6004 48 Coil Medium Output Machines. (Results for basis of specification of test) PRODUCTION TEST. X.7560. R.R. EAC. DYNAMO X.8781 do. (NARROW BRUSH MACHINES OF THE SS.{S. Smith} TYPE) | Date. Dynamo | (1) Remarks. | (2)(3)(4) Remarks | (5) Output at [strikethrough]Amperes.[/strikethrough] r.p.m. Volts (Max) | (6) C.C. Volts at r.p.m. (>13.6) | (7)(8)(9)(10) Remarks. | Brush setting angles | |---|---|---|---|---|---|---| | 15-1-31 Y.55.M | From production O.K. | O.K. | 15.8 at 1650 rpm | 18.5 | 13.6 volt at 740 rpm. | O.K. 15.5-48.5-64 | B = 15° C = 128.5 | | 19-1-31 Y.65.M | O.K. | O.K. | 16.0 at 1600 rpm | 18.5 | 13.6 volts at 750 rpm. | O.K. 15.5-46.5-62 | C = 129° | | 20-1-31 Y.75.M | O.K. | O.K. | 16.2 at 1600 rpm | 18.5 | 13.6 volts at 715 rpm. | O.K. 15.5-49-64.5 | C = 127.5° | | 21-1-31 Y.85.M | O.K. | O.K. | 15.6 at 1600 rpm | 18.5 | 13.6 volts at 735 rpm | O.K. 16.5-56-72.5 | B = 16° C = 128° | | 23-1-31 Y.95.M | O.K. | O.K. | 16.0 at 1600 rpm | 18.5 | 13.6 volts at 790 rpm. | O.K. 20.5-57.5-78 | C = 128° | | ||