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).
Series of queries and statements regarding magneto issues, specifically contact breaker point wear and the potential use of tungsten.
| Identifier | ExFiles\Box 65\3\ scan0217 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To 2 Order No. Customer's No. 19 (3) Are they aware that the continuous cam magneto No 106012 had not got slow make cams? (4) Can they return our Lucas magneto. (having cribbed the quiet feature of the contact breaker)? (5) Can they do anything to stop the rapid wear of contact breaker points with these types of magnetos. Lucas has had to use tungsten, will they consider experiments with tungsten? The ^EWG magnets off 9EX No 99802 has only run 3856 miles but the contact points have worn down 50%. We agree that the low speed sparking will be worse with tungsten contd Signed This Sheet must be filed on completion of the work. | ||