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).
Graph comparing the volt-speed curves of various ignition coils under specific test conditions.

Identifier  ExFiles\Box 163\7\  img247
Date  10th February 1939
  
VOLT - SPEED CURVES OF IGNITION COILS
R.R. DOUBLE BREAKER DISTRIBUTOR
.75 MAKE RATIO 12 VOLTS SUPPLY
D.B. 358 CAM 18OZS SPRING PRESSURE
CONTACT VIBRATING
CONTACTS CLOSED
DELCO - REMY ULTRA HIGH SPEED COIL
R.R. EXPL. HIGH SPEED COIL & BALLAST
R.R. STANDARD COIL & BALLAST
SECONDARY LOADED
SECONDARY VOLTS
MEGOHM LOAD
DISTRIBUTOR SPEED (R.P.M)
R.W.S
10/2/39
  
  


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