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).
Graph comparing the output characteristics of various ignition coils under specific test conditions.
| Identifier | ExFiles\Box 164\5\ img400 | |
| Date | 20th August 1938 | |
| OUTPUT CHARACTERISTICS OF IGNITION COILS AFTER RUNNING 1/2 HRS IN AN OVEN MAINTAINED AT 70°C USING DELCO REMY DISTRIBUTOR .75 MAKE RATIO. .5 MEGOHM LOAD D.75260 & D.76573 COILS HAVE CONRAY BALLAST RESISTANCES (2.45 Ω) 12.0 VOLTS SUPPLY H.T. WIRES IN HARNESS SECONDARY KILO VOLTS R.R. Ph III D.75260 DELCO REMY R.R. 20,000 TURN D.76573 R.R. IN.3 LUCAS SPORTS RUNBAKEN G.T 20.8.38 | ||