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).
Performance data for a single breaker distributor standard coil at different ballast resistances.

Identifier  ExFiles\Box 168a\5\  img063
Date  18th December 1936 guessed
  
SINGLE BREAKER DISTRIBUTION .550 MAKE-RATIO STANDARD COIL
EX1 WITH 1000 lbs. ON THE PRIMARY.B

Ballast resistance 1.70 ohms. cold. (Std.)

DISTRIBUTOR SPEED RPM. PRIMARY CURRENT SECONDARY VOLTAGE.
400 1.130 16800
800 .905 17600
1200 .752 16700
1600 .640 15200
2000 .579 14000

Ballast resistance 2.02 ohms. cold.

DISTRIBUTOR SPEED RPM. PRIMARY CURRENT SECONDARY VOLTAGE.
400 .935 12800
800 .820 12900
1200 .700 14800
1600 .640 14400
2000 .540 13300

Ha/Wat.
  
  


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