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).
Blueprint graph of a governor advance curve for a DCD.838 distributor, including spring particulars.

Identifier  ExFiles\Box 168\3\  img161
Date  25th March 1939
  
DEGREES ADVANCE
G.A. 21
DISTRIBUTOR DCD.838
GOVERNOR DW. 814.
GOVERNOR ADVANCE CURVE OF R.R. DISTRIBUTOR
TO DCD 838 (P.R.L.I) SPRINGS FITTED TO
SUIT B.V. LIMITS FOR W.I.I. No.9
DECREASING SPEED
INCREASING SPEED
LIMIT
SPRING PARTICULARS
1ST
.028" DIA WIRE
8 1/4 COILS
OUTSIDE DIA .187"
OVERALL LENGTH .940"
2ND
.048" DIA WIRE
7 COILS
OUTSIDE DIA .206"
OVERALL LENGTH .915"
CAM BREAK PERIOD
D.{John DeLooze - Company Secretary} 21°. I. O.{Mr Oldham} 1/2° E.{Mr Elliott - Chief Engineer}
G.T
25-3-39
  
  


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