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).
Instruction sheet detailing the examination and test results of a customer's faulty dynamo from chassis 45.SC.
| Identifier | ExFiles\Box 70\3\ scan0275 | |
| Date | 16th February 1927 | |
| RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. Top handwritten reference: X8783do Date: Feb. 16th 1927 To: FFC Order No.: PC 124. Customer's No.: X 8783 Customer's Faulty Dynamo TA 85 off Chassis 45.SC An examination and test of this machine resulted as follows:- 1. Insulation of whole machine. This was OK at first but broke down after a few seconds. It was subsequently found that the breakdown had occurred at the field winding terminal on the carcase, due to carbon dust. 2. All brushes were found to be free in their holders. 3. The surfaces of the positive brushes were blackened and slightly pitted. The negative and the control brushes were only slightly blackened. 4. The commutator was badly blackened. 5. The control brush was found to [inserted: have the] early setting of 120°, therefore the output was probably high. Signed: Constable This Sheet must be filed on completion of the work. | ||