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 specifications for REMY 12, REMY 6, and DELCO ignition system components.
| Identifier | ExFiles\Box 52\3\ Scan312 | |
| Date | 4th March 1920 guessed | |
| -3- Contd. REMY 12. REMY 6. DELCO CONDENSER. Condenser. In timer In coil In timer Approx. capacity (mf) .465 .31 - PRIMARY & CONDENSER. Approx. period of oscillatory current (secs). .000234 .000303 - Damping factor (ditto) .96545 .955 - Ratio working time constant / period. 13.9 21.8 - SECONDARY. No. of turns. 25920 16068 4 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 - 4 MC / √LK {L. King} 48800 32700 - 2 1/L' √LK {L. King} .601 x 10⁻⁶ 1.606 x 10⁻⁶ - Contd. | ||