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).
Instructions discussing the performance of contact points, comparing US and UK results, and suggesting a bench test for new larger tungsten points.
| Identifier | ExFiles\Box 35\6\ scan 137 | |
| Date | 29th June 1920 | |
| RR 239 (100 BKS.) (BH57-29-6-20.) MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. 2 Customer's No. not so bad if the contact faces are carefully trued up initially and bed together on contact. (e) Melin's "Esha" points are the best we have tested. (f) Mr Olley suggests that the moister climate of the British Isles has something to do with the less reliable performance of Tungsten points here than in America. We suggest therefore obtaining levers and screws fitted by Messrs Melin's with their "Esha" quality tungsten points 50% larger size than our present standard and running a pair on the bench with reduced running current, effected by additional ballast resistance or finer primary etc. Signed H.{Arthur M. Hanbury - Head Complaints} E-W. This Sheet must be filed on completion of the work. | ||