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 on the performance and wear of tungsten contact points.
| Identifier | ExFiles\Box 35\6\ scan 316 | |
| Date | 6th September 1927 | |
| Road Test Report. 6.9.27 TUNGSTEN CONTACT POINTS. Run 10,000 miles on 8-Ex. Pitted 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. -------------------- EPC. | ||