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).
Inquiry into why tungsten points are not durable in a 12-volt ignition system compared to a 6-volt Delco system.
| Identifier | ExFiles\Box 37\1\ scan 095 | |
| Date | 26th January 1921 | |
| X 3199 To EFC. from R.{Sir Henry Royce} c. to CJ. R2/G26.1.21. X.2894. X.3129. RE TUNGSTEN POINTS. X 3199 It would appear that tungsten points will stand in Delco battery ignition, but not on R.R. Why? Is the primary circuit different, or the condenser? We know the Delco is 6 volt while R.R. is 12 volt, but I should have thought this would rather favour the life through not wanting so many amperes. Kindly let me know. R.{Sir Henry Royce} | ||