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).
Test report on Tungsten contact points for a U.S. & Bosch Magneto.
| Identifier | ExFiles\Box 35\6\ scan 006 | |
| Date | 10th January 1921 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 X.2894 91269 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: E.F.C. Order No.: P.A. 54 Customer's No.: Re: X 2894 Date: Jan 10th 1921 X.3916 Test of Tungsten Contact Points on U.S. & Bosch Magneto. Z R 6. These points, one of which had been soldered on, were fitted, and the gap set to .026", which was taken as being the normal gap for this machine. After running for 2 1/2 hrs at normal speed, on normal gaps, the sparks suddenly began to fall off accompanied by a violent flashing at the contact-breaker. The points were examined, and found to be badly oxidized, although the machine was alright, and with platinum points, would spark regularly on 7.0 m/m gaps at the same speed. Signed: Cont'd.{John DeLooze - Company Secretary} This Sheet must be filed on completion of the work. | ||