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).
Oscillograms showing a comparison of voltage and current curves across a spark gap for a Wraith ignition coil using R.R. and Delco Remy distributors.
| Identifier | ExFiles\Box 164\5\ img411 | |
| Date | 27th February 1939 | |
| WRAITH IGNITION COIL. OSCILLOGRAMS SHEWING VOLTAGE AND CURRENT ACROSS SPARK GAP Veh 4 VOLTS ACROSS GAP VOLTAGE CURVES 8000 6000 4000 2000 0 R.R. DISTRIBUTOR 6000 VOLTS 4000 2000 0 .005 SEC DELCO REMY DISTRIBUTOR CURRENT THROUGH GAP CURRENT CURVES 50 mA 0 R.R. DISTRIBUTOR 50 mA 0 .005 SEC DELCO - REMY DISTRIBUTOR CIRCUIT VOLTAGE CURVES CIRCUIT CURRENT CURVES COIL 3V S.R. GAP 17 (MEGOHMS) 'Y' DEFLECTOR PLATES 420 Ohms 'Y' DEFLECTOR PLATES SCL. 27/2/39 | ||