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).
The unsatisfactory results of testing tungsten contact points, concluding that only platinum is suitable for their ignition system.
| Identifier | WestWitteringFiles\E\August1920\ Scan2 | |
| Date | 12th August 1920 | |
| ORIGINAL To R.{Sir Henry Royce} from EFC. c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Bn.{W.O. Bentley / Mr Barrington} c. to Da.{Bernard Day - Chassis Design} c. to Oy. c. to By.{R.W. Bailey - Chief Engineer} X.2894 - TUNGSTEN CONTACT POINTS. Further to our last report EFC2/T25.6.20 re the above tungsten contact points received from the Independent Lamp & Wire Company, of which a pair were mentioned in that report as having been fitted to 49-GB and afterwards transferred to 6 EX, we have not been able to obtain satisfactory results with these points. We are sending herewith for Mr. Royce's inspection these particular tungsten points which have now been removed from 6 EX. Our experience so far shows that there is nothing but platinum which can be safely used on our own ignition. EFC. | ||