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 for a utility test of a spark-coil, noting distributor modifications and test conditions.
| Identifier | ExFiles\Box 37\1\ scan 089 | |
| Date | 15th December 1920 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 88258 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC Order No.: 30 Customer's No.: 1 Re: X 3199. Utility list of Spark-coil A further utility test has been taken on the standard ignition coil No 149 coil being used, with the leakage resistance across one of six working gaps. The distributor was standard except for the sparking points which were of Nichrome. Running speed 500 rpm. Steady sparking was obtained for 15 secs before taking each reading. Remy coils were used for the leakage, as in the test on (Contd) Signed This Sheet must be filed on completion of the work. | ||