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).
List of dynamo complaints and their probable causes of failure.
| Identifier | ExFiles\Box 70\3\ scan0330 | |
| Date | 23th November 1927 guessed | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-B-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. P P. 13. (3) Customer's No. 19 Dynamo | Complaint | Reported Probable Cause of Failure --- CE.4S | Solder melted | Breakdown of armature insulation. RE.1S. | Solder melted | Dynamo quite OK but output too high MB.7S | Blowing of fuses. Solder melted. | Bad connection in the dynamo-battery circuit. UG.1S | Noisy. | Loose bearings. RE.2S | Burning out of side lamps. | Output found to be too high but not the cause of lamp failures. Wrong type of lamp used. TA.7S. | Burning of cutout points. | Dynamo supposed to be at fault. Dynamo found OK but output too high. ER.5S. | Accumulation of dirt. | Brush wear due to excessive output, but machine otherwise normal. TA.3S. | High output. | Solder found to be melted due to control brush position. RE.7S. | Burnt out | Fault on external circuit. Signed C.A.P This Sheet must be filed on completion of the work. | ||