Table detailing the resistances and inductances of primary and secondary windings for various non-trembler ignition coils.
| Identifier | ExFiles\Box 164\5\ img029 | |
| Date | 24th September 1926 | |
| PARTICULARS OF RESISTANCES AND INDUCTANCES OF PRIMARY AND SECONDARIES OF NON-TREMBLER IGNITION COILS. X 918 X 4596 X 918 / 24.9.26 | Coil | PRIMARY Resis. (Ω) | PRIMARY Imped. at 50~ (Ω) | PRIMARY Reac. at 50~ (Ω) | PRIMARY Induc. (hys) | SECONDARY Resis. (Ω) | SECONDARY Imped. at 50~ (Ω) | SECONDARY Reac. at 50~ (Ω) | SECONDARY Induc. (hys) | Remarks | |---|---|---|---|---|---|---|---|---|---| | DELCO. NO 2178 American Bosch TYPE TC-30 | .62 | 2.75 | 2.67 | .0084 | 2705 | 9320 | 8920 | 28.0 | Nearly closed iron circuit. | | R.R. | 1.70 | 2.25 | 1.92 | .0060 | 4535 | 18650 | 18090 | 56.8 | As standard on RR cars in USA. | | R.R. L.C. type. | .65 | 2.32 | 2.23 | .0071 | 4870 | 14715 | 13890 | 43.6 | Larger core. 21 S.W.G. Primary. 19000 turn Secondary. | | R.R. L.I. type | .94 | 3.20 | --- | .0097 | 4193 | 14530 | --- | 44.2 | 22 S.W.G. Primary. Reduced secondary insulated copper wire, mygdalated. Instead of Paxolin plus outside primary coil. | | LUCAS NO. TYPE C68. 6837 | 1.52 | 3.30 | 2.93 | .0093 | 2994 | 12530 | 12170 | 38.6 | Central H.T. Terminal. Long core. Iron case. Outside primary. | | R.R. | 2.04 | 3.56 | --- | .0093 | 3735 | 11310 | --- | 34.0 | One turn of "flhys" iron round outside coil. | | O.P.I. M.L. NO. TYPE X12. 614215 | .98 | 3.88 | 3.76 | .0119 | 4126 | 8200 | 7085 | 22.5 | magneto armature apparently fitted in coil case. | | Delco-Remy No 529. | 4.15 | 7.32 | 6.03 | .0191 | 4050 | 15500 | 14960 | 47.5 | outside primary coil in tin case Central H.T. No ballast. Secondary wound in two sections. | | R.R. DS418 | .91 | 3.05 | 2.91 | .0092 | 4787 | 12700 | 11760 | 37.4 | Outside Primary. Central H.T. | | Marelli NO. 228. | 4.35 | 7.16 | 5.69 | .0181 | 6564 | 17800 | 16610 | 52.7 | Outside primary. No Ballast. | | De Jon. | 4.57 | 8.70 | 7.40 | .0235 | 3686 | 14250 | 13760 | 43.7 | No ballast. | | ||
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).