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).
Extract from a report on distributor contact points and condenser performance on an 18-GIV model after a 10,000-mile test.
| Identifier | ExFiles\Box 165\5\ img041 | |
| Date | 30th January 1931 | |
| X6112 Extract from report on 18-GIV at 10,000 miles dated 30.1.31. X.5690. DISTRIBUTOR TO LOP. D.51618. X.8692. X.6037. The contact points at the finish of the mileage were not considered to be in a good condition, considerable material had been transferred electrically from one contact to the other making the contact points very uneven. We have had considerably better results. It has been noted that when using a condenser with a lower capacity i.e. .240 mf. there has been less depositing effect and the contacts are cleaner. The standard capacity is .275 mf. to .325 mf. The condenser used on 18-GIV had a capacity of .264 mf. The mushroom head which was broken was made of a supposed better non-tracking material XM.1000. Its textile strength is considerably lower than our standard material. We therefore do not propose to bring it into production. The mechanical condition of the unit was good. | ||