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).
Testing distributor sparking points of various materials for a battery ignition system.
| Identifier | WestWitteringFiles\F\January1921\ Scan51 | |
| Date | 28th January 1921 | |
| To R.{Sir Henry Royce} from EFC. c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to PN.{Mr Northey} c. to Bn.{W.O. Bentley / Mr Barrington} c. to Da.{Bernard Day - Chassis Design} c. to By.{R.W. Bailey - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to EWT. for R.R. Inc. ORIGINAL X.3309. - DISTRIBUTOR SPARKING POINTS OF VARIOUS MATERIALS FOR R.R. BATTERY IGNITION. X.2894. X.3917. Please find attached copy of my assistant's report on the running on the bench of distributor sparking points of various materials on the R.R. battery ignition, under otherwise standard conditions, except that tungsten points were being tested at the same time. Although the distributor is not specially ventilated in any way, we have not experienced any signs of the production of nitric acid, from nitric oxide produced, with the resulting corrosion. We mention this point because in the distributor of the U.S.A. Bosch B.6 magneto, which is of the jump spark type, we have experienced such formation and consequent corrosion. These six sparking points and rotors are being forwarded to Mr. Royce for his inspection. These are marked as follows :- The silver points are not marked; the rotor is marked with the word "Silver" on the top (when in position) face, near the sparking periphery. The tungsten sparking points are marked T and the work "Tungsten" is placed on the rotor as with "Silver" above. Contd. | ||