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).
Loosening of nuts on the main switch due to the shrinkage of insulating washers.
| Identifier | ExFiles\Box 24\2\ Scan019 | |
| Date | 1st March 1920 | |
| X.1109 CK.{Mr Clark} EP{G. Eric Platford - Chief Quality Engineer}/T30/F1.3.20. X.3034. - Main Switch. X.1109. Replying to your CK{Mr Clark}3/T27.2.20, we have not yet had trouble through pillar coming slack, although it is always possible to tighten down the nuts after running. I think this is due to shrinkage of both the micanite and theVulcasbestos washers used, and I should say that the worse offender is the Vulcasbestos washer. The design does not seem to be in keeping with Mr. Royce's ideas which he pointed out on the dynamos, i.e. bolting up on a soft insulating material which will continually shrink, etc. EP{G. Eric Platford - Chief Quality Engineer}/T. | ||