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 detailing wear and damage to a switch after a 25-hour endurance test.
| Identifier | ExFiles\Box 53\3\ Scan140 | |
| Date | 24th January 1919 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 95323 ROLLS-ROYCE LIMITED. INSTRUCTIONS. II 19 To Order No. Customer's No. J.A.5. Re (cont'd) started to squeak which continued until the end of the test. Inspection After having ran for 25 hours the switch was dismantled for examination, when the drum was withdrawn from its case a fair amount of dust came out with it, composed of brass & ebonite, the brass coming from the small bush which was found to be considerably worn, & the ebonite being worn away by the brass plungers. It was also noticed that the insulation was burnt at the ends of the segments due to the sparking. this being worst in the case of the magneto earthed segment. Signed G.J. This Sheet must be filed on completion of the work. | ||