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 report on main and control brushes for a 20hp dynamo.
| Identifier | ExFiles\Box 50\5\ Scan392 | |
| Date | 30th September 1924 | |
| RR 238(150 BKS.) (BH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. 30. Sept. 1924. To: EFC Order No. AC.26. Customer's No. X 4610 X4333 LFC2 Main and EG.3399B Control Brushes on 20hp dynamo with 2 coils per slot. These brushes have run for the usual period on the bench testing rig. Sparking was slight, the brushes being fairly well polished, with duller trailing edges, especially on the positive. The commutator was left in fair condition, but with some burning on several of the segments. (A large number '6' is circled over the text) Measurements of the lengths of the brushes before running, have been mislaid so that the wear is not known. Tests are proceeding on LFC2 main and LFC3AB8 control brushes. Signed: A.A. This Sheet must be filed on completion of the work. | ||