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).
Table of resistances and inductances for various battery ignition coils.
| Identifier | ExFiles\Box 52\3\ Scan322 | |
| Date | 15th April 1918 | |
| X.2814 15.4.18. X.2814. X.3296. RESISTANCES, INDUCTANCES ETC. OF VARIOUS BATTERY IGNITION COILS Coil. No. of cyls: Voltage. Primary Resistance (Ohms). Ballast Resistance (ohms). Primary Inductance. (henries). Time cons: (secs). Conden: Capacity (mf) Secondary Resistance (Ohms) Remy 12 (1) 12 6 .235 .69 .0030 .0032 .465 4100 Remy 12 (2) 12 6 .235 .57 .0032 .0040 ... 4360 Remy 6. (1) 6 6 .71 .43 .0075 .0066 .31 2750 Remy 6. (2). 6 6 .85 .23 .0082 .0076 --- --- Delco. 6 6 .53 .42 .0047 .0049 --- 2200 Remy 6 (284A). 6 6 .91 .36 .0089 .070 --- --- Y 'Liberty. 12 8 .35 1.10 .0036 .0025 .38 3070 (Right margin text: R.R. 252 A 400 P.T. (S.C. 33). 12-2-18 G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 1646.) | ||