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).
Technical specifications and test results for a USA Bosch Battery Ignition Coil.
| Identifier | ExFiles\Box 61b\4\ scan0060 | |
| Date | 5th August 1921 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X 4275 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFE Order No: AB. 16. Customer's No: / Date: 5 Aug. 1921 X 4275 USA Bosch Battery Ignition. The particulars of the USA Bosch ignition are as follows. COIL (Primary) Impedance at 50.7~ = 2.18 w. using Royce ammeter and a.c milli-ammeter 1068 as voltmeter, on transformer. Resistance = .75 w By 15 volt and 15 amp. ranges on inst. 40. Hence reactance at 50.7~ = 2.046 w which gives an inductance of .00643 hy{Tom Haldenby - Plant Engineer} (contd) This Sheet must be filed on completion of the work. | ||