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).
Instructions detailing the electrical properties of an Ignition Coil B2.
| Identifier | ExFiles\Box 45\4\ Scan023 | |
| Date | 13th September 1922 | |
| R.R. 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X.4079a ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC Order No: AB53 Customer's No.: 1 13 Sept 1922 x 4079 Ignition Coil B2 Quantities. Primary Resistance, by inst. 98 1.5 ranges = .482 w. Impedance, using Royce ammeter and Weston milli-ammeter as voltmeter = 3.11 w. ∴ Reactance at 50~ = 3.08 w and Inductance = .00979 hy.{Tom Haldenby - Plant Engineer} Secondary Resistance, by inst. 98 on 90 volts d.c., 150 volt range & as milliammeter = 9,300 w. Impedance by Weston inst (a.c.) with resistance for volts, and alone for milli-amps = 19,800 w. ∴ Reactance at 50~ = 17,480 w. and Inductance = 55.6 hy.{Tom Haldenby - Plant Engineer} Signed: F.J. Allen This Sheet must be filed on completion of the work. | ||