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).
Performance of battery ignition contact maker tungsten points compared to Delco Remy parts.
| Identifier | ExFiles\Box 35\6\ scan 231 | |
| Date | 10th January 1927 | |
| X2894 EFC. } FROM R.{Sir Henry Royce} To E.{Mr Elliott - Chief Engineer} HS.{Lord Ernest Hives - Chair} } (At Le CanadelHenry Royce's French residence). RS{Sir Henry Royce's Secretary}/M7.1.27. DESPATCHED FROM WW. 10.1.27. c. to BJ. WOR{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} BATTERY IGNITION - RR. CONTACT MAKER - TUNGSTEN POINTS. X.4284. X.4652. X.2894. EFC. says on our contactmaker the contact points both in platinum and tungsten do not stand up as well as in Delco Remy, all other parts being the same. I should propose speed of make, and speed of break, be examined, and think that there would be an advantage in a slow make, and a quick break. Moreover it seems that the point might be saved or spoiled by the rigidity of the contact arm, and if it bounces, i.e. makes contact twice and three times, also whether it requires a limit to the lift or some damping. There are a few points which could vary, but which EFC. has probably compared. R.{Sir Henry Royce} | ||