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 ignition advance curves against vehicle speed in miles per hour.

Identifier  ExFiles\Box 163\7\  img284
Date  7th April 1936 guessed
  
DEGREES ADVANCE B.T.D.C.
M.P.H.
ROAD FIGURE OF IG. AGLE. JUST TO AVOID DETONATION. HEAD CLEAN
SHELL N°1 PETROL
PRELIMINARY
DELCO REMY CURVE
  
  


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