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 of the make ratio versus speed curve for a new standard contact breaker.

Identifier  ExFiles\Box 35\6\  scan 433
Date  27th July 1928
  
R.R. STANDARD BATTERY IGNITION.
MAKE RATIO - SPEED CURVE OF NEW STANDARD
CONTACT BREAKER to LEC 2460.
MAKE RATIO
.7
.6
.5
.4
.3
.2
.1
0
DISTRIBUTOR SPEED. r.p.m.
200 300 400 600 800 1000 1200 1400 1600 1800
H.E.W
27-7-28
  
  


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