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 for dynamos, detailing performance metrics, adjustments, and inspection remarks.
| Identifier | ExFiles\Box 70\4\ scan0059 | |
| Date | 30th November 1925 | |
| X.8660. EAC. DYNAMO. X.8781do. X8781/do | Date. | Dynamo numbers | (1) Remarks. | (2)(3)(4) Remarks. | (5) Output at 1050 r.p.m. | (6) O.C. Volts at 540 rpm. (= 13.6) | (7)(8)(9)(10) Remarks. | Brush setting angles. | |---|---|---|---|---|---|---|---| | 20.8.25. | EB.35 | Std. machine from prodn. Corner of O.C. brush chipped off. | Machine found to be excited in wrong direction. | Amperes: 11.75, Volts: 15.0 | Volts low. 550 rpm. to obtain 13.6 volts. | O.K. | M.{Mr Moon / Mr Moore} 12° C. 120° | | 19.9.25. | TS | Std. machine obtained from prodn. for 8-EX. | O.K. | Amperes: 11.0, Volts: 15.0 | 14.0 | O.K. | M.{Mr Moon / Mr Moore} 12° C. 120° | | 21.10.25. | ON.55 | Std. machine from prod. O.C. brush has not .002" clearance. C. springs rather strong (13 ozs) | O.K. | Amperes: 10.95, Volts: 15.0 | 14.15 | O.K. | M.{Mr Moon / Mr Moore} 120° C. 120° | | 30.10.25. | EB.25 | Std. Received as a complaint machine from Test Dept. (High output) Brushes sticky in holders. | O.K. | As received Amperes: 12.05, Volts: 15.0, Brushes made free Amperes: 12.40, Volts: 15.0 | 14.60, 15.70 | O.K. | M.{Mr Moon / Mr Moore} 12° C. 120° | | 18.11.25. | OA | New expl. standard. | - | Amperes: 12.35, Volts: 15.0 | 15.40 | - | M.{Mr Moon / Mr Moore} 4° C. 113° | | 21.11.25. | AU | Early prodn. machine made std. by moving C. brush to 120°. | O.K. | Amperes: 10.90, Volts: 15.0 | 15.0 | O.K. | M.{Mr Moon / Mr Moore} 12° C. 120° | | 19.11.25. | EV.{Ivan Evernden - coachwork}85 | Check machine from prodn. | O.K. | Amperes: 11.80, Volts: 15.0 | 14.80 | O.K. | M.{Mr Moon / Mr Moore} 12° C. 120° | | 20.11.25. | AU | New setting of C.brush | O.K. | Amperes: 9.90, 9.50, Volts: 14.9, 15.0 | 15.20, 14.30 | O.K. | M.{Mr Moon / Mr Moore} 12° C. 122° | | 30.11.25. | OA | Amended expl. std. | - | Amperes: 10.20, Volts: 15.0 | 14.80 | - | M.{Mr Moon / Mr Moore} 8° C. 80° | | ||