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).
Diagram and specification sheet for a Siemens Sinterkorund Insulated Spark Plug, Type A.G. 30.
| Identifier | ExFiles\Box 58\2\ Scan080 | |
| Date | 15th February 1934 | |
| TYPE OF PLUG. GAS VOLUME. WEIGHT. A.G. 10 2.0 Cu Cm 3.19 OZ A.G. 20 1.7 Cu Cm 3.19 OZ A.G. 30 1.3 Cu Cm 3.19 OZ DRC No E & I. 4929. Issued by:- Directorate of Technical Development. AIR MINISTRY DEPT. ELECTRICAL & IGNITION. TRACED M.{Mr Moon / Mr Moore} M.{Mr Moon / Mr Moore} Hettrick S. 12/1/34 CHECKED U. 15/1/34 APPROVED C E Boads 1.5.2.34 2.55" 0.47" STEEL STEM. WASHER ALUMINIUM. SINTERKORUND INSULATION. CEMENT. BRASS SLEEVE. STEEL BODY. COPPER WASHERS. NICKEL CENTRE ELECTRODE. EARTH ELECTRODE. 9/16" WHIT HEX. SIEMENS SINTERKORUND INSULATED SPARK PLUG. TYPE A.G. 30. E & I.4929. | ||