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).
Query regarding the compatibility of tungsten points with different battery ignition systems.
| Identifier | ExFiles\Box 35\6\ scan 015 | |
| Date | 26th January 1921 | |
| To EFC. from R.{Sir Henry Royce} c. to CJ. X2894 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} | ||