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).
Identifying dirt as the cause of threaded shackle seizure and proposing a metal shield as a preventative measure.
| Identifier | ExFiles\Box 91\2\ scan0251 | |
| Date | 12th August 1937 | |
| To Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} from Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} (Chateauroux) 300a Rm{William Robotham - Chief Engineer}/Les.4/AP.12.8.37 32-EX. Threaded Shackle Seizure.. We have cut the threaded bush into two pieces and find that the lubrication and condition of both the pin and the bush are perfect. We conclude that the whole trouble of seizure is due to dirt. It would therefore appear to be very beneficial if you could try to prevent dirt from getting on to the threaded parts, by fitting a better metal shield. For our next design of threaded shackles we are going to take particular care to prevent dirt getting on to the threads. We should like to know if the off side receives more dirt and whether you think dirt can be the cause of the trouble. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||