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).
Comparison table of electrical specifications for Condenser, Primary, and Secondary coils for REMY 12, REMY 6, and DELCO systems.
| Identifier | ExFiles\Box 52\3\ Scan270 | |
| Date | 28th April 1917 guessed | |
| -3- REMY 12. REMY 6. DELCO. CONDENSER. Condenser In Timer In Coil In Timer Approx. capacity (microfarads) .465 .31 - PRIMARY & CONDENSER. Approx. period of oscillatory current (secs). .000234 .000303 - Ratio working time constant / period 13.9 21.8 - SECONDARY. No. of turns. 87 / 25880 16068 14300 Dia. of wire (inches) .005 .005 .005 Approx. resistance (ohms) 4100 2750 2200 " inductance (henries) 62.0 30 15 " time constant (sec) .01513 .011 .0068 PRIMARY & SECONDARY. Step up ratio. 144.7 63.8 56.75 √LK {L. King} .0000373 .0000482 M .409 .450 Mc/√LK {L. King} 48400 32600 1/L' √LK {L. King} .602 x 10⁻⁶ 1.606 x 10⁻⁶ | ||