Rolls-Royce Archives
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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.
  
  


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