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 of specifications for Remy 12 cylinder, Remy 6 cylinder, and Delco 6 cylinder 6 volt coils.
| Identifier | ExFiles\Box 52\3\ Scan310 | |
| Date | 4th March 1920 guessed | |
| X. 3199 - 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. 173 110 Total cross section of iron (inch²) .237 .176 .216 Saturation pole strength. 2560 1910 2330 Saturation core flux 32200 23,900 29,300 PRIMARY. No. 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 PRIMARY & CORE Interlinkages per ampere. 30,000 750,000 470,000 Flux per ampere 167067 2980 1680 Fraction of saturation per ampere. .052 .125 .064 No. of turns x C.S. area. 42.7 44.3 54.4 6666 | ||