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).
Comparative analysis of specifications for Remy and Delco 6 volt ignition coils.
| Identifier | ExFiles\Box 52\3\ Scan268 | |
| Date | 26th April 1917 | |
| COMPARISON OF REMY 12 CYLINDER REMY 6 CYLINDER AND DELCO 6 CYLINDER 6 VOLT COILS. CORE. REMY 12. REMY 6. DELCO Length (inches) 5.500 3.500 2.650 Diameter of wire (inches) .036 .036 .050 No. of wires. 235 173 (Rewound coil 162 110 Total cross section of iron (inch²) .237 .176 .216 Saturation pole strength 2560 1910 2330 Saturation core flux 32200 23,900 29,300 PRIMARY Number of turns 180 252 252 No. of layers 2 4 4 Dia. of wire (inches) .040 .024 .032 Approx. resistance (ohms) .235 .71 .53 " measured inductance (sechoms) (Henries) .0030 .0075 .0047 (Rewound coil .0068) PRIMARY & CORE. Interlinkages per ampere 300,000 750,000 470,000 Flux per ampere 1667 2980 1860 Fraction of saturation per ampere .052 .125 .064 No. of turns x C.S. area 42.7 44.3 54.4 | ||