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 detailing a low-speed sparking test on a magneto and the probable cause of failure.
| Identifier | ExFiles\Box 47\4\ Scan105 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS.)(BH57.29-6-20.) MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. 2 Customer's No. The low speed sparking was as follows:- Advance 350 rpm Central 210 " Retard 170 ~ and the performance of the magneto during the 7 hrs run was considered to be OK. It is probable that the condenser capacity is initially high which, at a high temperature, would result in bad low speed sparking. There does not appear to be a loose connection, as the platinum points are in quite good condition. Signed H.E.W. This Sheet must be filed on completion of the work. | ||