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).
Issues with magnetos fitted with tungsten contacts, causing the contact breaker spring to fail.
| Identifier | ExFiles\Box 35\5\ scan 052 | |
| Date | 16th January 1919 | |
| To EFC. from EH. X.2894 RE - TUNGSTEN CONTACTS. We find that the magnetos fitted to tungsten contacts give trouble after a few hours running due to the spring on the contact breaker breaking. The spring breaking destroyed the contact breaker so that it could not run. We suggest that you should obtain these contacts from us to carry out the tests yourself. EH. | ||