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).
Road test report detailing the performance of tungsten contact points over various mileages.
| Identifier | ExFiles\Box 172\3\ img101 | |
| Date | 6th September 1927 | |
| Road Test Report TUNGSTEN CONTACT POINTS 6.9.27 Run 10,000 miles on 8-EX. Fitted at end of run. * 7,500 " 10-G3. Changed due to pitting and misfiring. * 5,400 " 98-NK. Misfiring developed. * 7,800 " 10-G3. " * 7,950 " 5.EX. Cleaned and re-set at 7000 miles. Condition good when removed for sale of car. * 10,750 " 9-G3. No complaint. * 10,000 " 7-EX. " * 13,900 " 9-EX. Cleaned and re-set at 5500 and 11,000 miles. * 7,600 " 9-G3. Trimmed and re-set. * 7,250 " 12-EX. Trimmed at 3350 miles. Present condition at 7250 miles very fair. -------------------------- EFC. | ||