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).
10,000-mile test of tungsten battery ignition points on chassis 10-G3 in France, comparing performance to platinum points.
| Identifier | ExFiles\Box 35\6\ scan 268 | |
| Date | 6th May 1927 | |
| To R.{Sir Henry Royce} from EFC. c. BJ. PN.{Mr Northey} c. E.{Mr Elliott - Chief Engineer} Ds. c. Wor.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} c. EP.{G. Eric Platford - Chief Quality Engineer} X8894 EFC4/T6.5.27. TUNGSTEN BATTERY IGNITION POINTS ON 10,000 MILE TEST ON CHASSIS 10-G3. IN FRANCE. The following is the report received from Mr. Hancock with 10-G3 in France :- "Herewith please find the battery ignition contact points taken off after a mileage of 8054. We have taken them off as the ignition is useless with the points in this condition and we prefer you to see them in this condition rather than re-bedding them. It is reported in the Log Book that the battery points were trued up by Rn.{Mr Robinson} after a mileage of 2564." It appears from this that it was considered necessary to re-face these after a mileage of 2564, and from inspection of the points now returned, that somehow or other after trimming, the points did not meet one another concentrically and bed correctly, as at first set by my assistant. We understand from Mr. Dodd that the tungsten points on your car 7-EX have done and are doing remarkably well. It was hoped that these points on 10-G3 would satisfactorily run through a 10,000 mile test to enable standardisation of this item to be effected. It is difficult to get a really satisfactory 10,000 mile run on either tungsten or platinum points, without re-adjustment, so much so that we are now of the opinion that in comparison of platinum and tungsten, we think standardisation might be considered to be effectible on some smaller run, say 4,000 miles, without attention. If on 10,000 miles, trimming must be allowed. Contd. | ||