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 performance of different B.60 cylinder head configurations and ignition advance.

Identifier  ExFiles\Box 132\4\  scan0228
Date  26th May 1939 guessed
  
B.60 CYLINDER HEAD COMPARISON
S. 100
B.60 N°3 UNIT.
CAMSHAFT: E.B. 4332
VALVE TIMING
I.O. 1° A.T
E.O. 27° B.B.
I.C. 49° A.B
E.C. 11° A.T
PISTONS: AEROLITE (FLUSH TOP)
INDN. SYSTEM.
2 - 1 1/2 S.U'S ON 1.6 PIPE.
① CYL. HEAD. EXS 1384/1758/1869 (.100 OFF FACE) CAP=111 CC'S. C/R=7:1
② As ① NON-DETN. TEST BED EXH. SYSTEM. REDLINE.
③ OPEN EXH - B.M.P.
④ NON-DETN POWER ON CYL. HEAD E.B. 3844
⑤ NON-DETN POWER ON CYL. HEAD E.B. 4706
B.H.P. & B.M.E.P.
IGNITION ADVANCE
CYL HEAD EXS 1384
Ⓐ MIN. ADV. FOR MAX. POWER.
Ⓑ NON-DETN. LINE.
IGN. ADV. B.T.D.C.
  
  


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