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 governor advance curve for a distributor, showing degrees of advance against distributor RPM.

Identifier  ExFiles\Box 168\3\  img094
Date  4th February 1938
  
GOVERNOR ADVANCE CURVE OF
ROLLS-ROYCE DISTRIBUTOR TO DRG 426 (Nº7)
LIMITS TO RM{William Robotham - Chief Engineer}/SNDL 4-2-38 FOR B.T. UNITS.
1st SPRING AS DRG.
2nd SPRING 34 COILS 16 SWG (.064")
FREE ANGLE 143° LENGTH .375
LOAD 2 LB. 2.825
INSIDE DIA. .296 MEAN DIA. .360"
DEGREES ADVANCE.
DISTRIBUTOR SPEED R.P.M.
LIMIT
SJ/4-2-38/F.3
  
  


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