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 the sparking of a 6-volt 12-cylinder Remy coil with various connection configurations.
| Identifier | ExFiles\Box 52\3\ Scan330 | |
| Date | 17th October 1919 | |
| X.2814. X.3/29. TEST ON SPARKING OF 6 VOLT 12 CYLINDER REMY COIL AT 5-6 mm. AIR GAPS (WHEN CURRENT REVERSED IN PRIMARY AND HIGH TENSION TERMINALS WERE CONNECTED UP IN DIFFERENT WAYS). The effectiveness of the sparking in the various cases below was compared by connecting a slide wire rheostat in series with the primary and the "running" current reduced to a point where definite misfiring occurred. Conditions which caused the smallest "running" current consistent with even sparking were considered the best. [WIRING DIAGRAM LABELS] Test 1 (Spark Gaps) (HT Terminal) (RR Condenser) (Timer) TIMER BAT + DELLC Ballast (Coil) (earth) (ground of 2ndry) fig 1 - Connections as above - Contact breaker speed = 500 R.P.M. Running current = 1.90 amps. Running current reduced without misfiring to 1.30 amp. Practically no sparking occurred when running current reduced to .90 amp. Contd. | ||