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 two production magnetos, detailing pass/fail results for low-speed sparking.
| Identifier | ExFiles\Box 43\4\ Scan053 | |
| Date | 8th December 1924 | |
| RR 238 (180 BKS.) (DD 431-8.12.24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To______________________________________19__ Order No.__________________ Customer's No.________________ These magnetos have been production tested on the bench to our own specification; No 83120 passed OK but No 83119 did not quite comply on the low speed sparking, the minimum sparking speeds being advance 190 rpm, central 260 rpm and retard 300 rpm. Our specified limits are (a) 170 (b) 210 and (c) 260 rpm. (not for report) Signed H.E.W. This Sheet must be filed on completion of the work. | ||