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).
Instructions regarding the performance of a dynamo, its voltage, and issues with the armature and controller.
| Identifier | ExFiles\Box 59\1\ Scan152 | |
| Date | 29th June 1920 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. 4 three or more full strokes per second according to the dynamo speed, and keeping the average voltage down to within about 15.0 up to 2600 rpm when the voltage with the resistance in (about 11.5) was sufficient to hold the armature over. On charge, the operation was not satisfactory as the armature would vibrate through an infinitesimal stroke without throwing right over. A "delayed action" design of controller is necessary to obviate this, but the quantities adopted will have to effect a compromise such that the dynamo excitation will not be so far reduced as to allow the controller to return to contact having once operated, (Cont'd) Signed This Sheet must be filed on completion of the work. RR 238.(150 BKS.) (SH57.29-6-20.) MP 224355 | ||