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).
Performance comparison graph for 120° and 114° camshafts.

Identifier  ExFiles\Box 13\2\  02-page131
Date  21th August 1931
  
COMPARISON W.W. 120° & 114° CAMSHAFTS.
RM{William Robotham - Chief Engineer} P18
21/8/31
4.75 CR{Mr Cra???ster / Mr Chichester} PD UNIT
① I.O. 3° B.T.C E.O. 54° B.B.C. CLAUDEL
I.C. 58° A.B.C. E.C. 12° A.T.C. E82448
② I.O. 2.5 P.T.C. E.O. 63.2 B.B.C. CLAUDEL
I.C. 60.3 A.B.C E.C. 4.5 P.T.C.
③ AS ① BUT TWIN CHOKE CARB TIMING 7° EARLIER
CAM FORMS LEC. 2918
INLET LIFT .470 EX LIFT .460
① 114° SHAFT
② 120° SHAFT
B.H.P.
R P M
B.M.E.P.
INDUCTION DEPN INS HG
INLET THROAT DIA. 2.0"
TWIN CARBS
CLAUDEL
SEP 31
  
  


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