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).
Test results and calculations for a ballast and a condenser.
Identifier | ExFiles\Box 61b\4\ scan0062 | |
Date | 6th November 1918 | |
RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. 3 19__ BALLAST Resistance cold = .313 ωs. By inst. 40, 1.5 volt and amp. ranges. Characteristic:- Volts | Amps | Ohms 1.9 | 3.25 | .585 3.82 | 3.8 | 1.0 5.7 | 4.76 | 1.2 CONDENSER m.a. at 110 volts 50.~s cold = 17.5. Capacity therefore = .50 mf. There is practically no leakage when Cold. On 200 volts a.c however, the (Contd) Signed This Sheet must be filed on completion of the work. | ||