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 graph from Brooklands tests comparing two different engine configurations.

Identifier  ExFiles\Box 29\3\  Scan330
Date  19th June 1931
  
SHEET I
BROOKLANDS TESTS 19/6/31
LAP SPEED C.O. OPEN.
18 G IV 70.64 M.P.H.
16G IV 69.66

Upper Graph Data:
18 G IV 35.7 CWTS.
JAPAN UNIT C/R 5.25
TWIN ZENITH 26M.M. CHOKES
112° CAMSHAFT OPEN EXHAUST
Diagram values: T.O.C.11, 49, 49

Lower Graph Data:
16 G IV 31.8
JAPAN UNIT
C/R 5.25 46% LARGER R.R. CARB.
110° CAMSHAFT OPEN EX.
Diagram values: 10°, EX., .013 CLCE, 43, 34, CAR WT.

Axis Labels:
B.H.P
B.M.E.P.
ENGINE R.P.M.
ROAD SPEED M.P.H.
  
  


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