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).
Instruction sheet detailing the unsatisfactory performance of tungsten points after a 5,000-mile test.
| Identifier | ExFiles\Box 35\6\ scan 071 | |
| Date | 18th March 1921 | |
| RR/H (300 Bks.) (SF 152. 6-11-18.) MP 197880 X.2894. ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Col Harper 18-3-21 Order No. Customer's No. X.2894 re Tungsten points (AC.) After 5,000 miles test, these points are not satisfactory when compared with plat. A great amount of metal is transferred from one point to the other with the result they "hook on" & cause a misfire. To keep them in order attention is required every 2000 miles. Signed: H G Clarke This Sheet must be filed on completion of the work. | ||