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).
Inspection report on an electrical component detailing issues such as severe commutator flashing, overheated field coils, and insulation breakdown.
Identifier | ExFiles\Box 70\3\ scan0306 | |
Date | 8th December 1924 | |
RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 431-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To...........................................................................................19 Order No. P.D.2. (2) Customer's No. ................. end connection becoming loose, causing severe flashing at the commutator. Severe flashing is thought to have taken place, as the commutator connections were found to be covered with black, and bluish grey deposits. The armature otherwise appeared to be alright. Both positive brushes had been removed at some time, and an attempt made to rebed them. The bedding of these was very bad. The control and negative brushes were somewhat blackened and pitted while the commutator had the appearance of having been partially cleaned. The field coils seem to have been overheated. Carbon dust had bridged the insulation of the positive brush holder, causing a breakdown. Some of the rivets securing the insulating band inside the end cover were found to be loose. Signed C.A.P. This Sheet must be filed on completion of the work. | ||