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 comparing three cam forms and four alternative engine valve timings.

Identifier  ExFiles\Box 13\2\  02-page164
Date  18th April 1932
  
SHEET II
JAPAN III
T.D.C 8°
EX 48
IN 45°
.020 CLCE
TOE OF INLET CAM TO BE
SHORTENED AS FAR AS
POSSIBLE
INLET DURN 228
EXHAUST DURN 233
110° SHAFT

PEREGRINE
3 8
EX 45
IN 42
.020 CLCE
INLET DURN = 180+42=222
EXHAUST " " = 180+52=230
T.D.C 8
EX 50
IN 42
.020
INLET DURN = 230
EX. DURN = 230

BENSPORT
T.D.C. 10
EX 55
IN 45
.020 CLCE
INLET DURN 180+52=235
EXHAUST " " 180+55=235
T.D.C 10
EX 55
IN 40
.020
THIS ALMOST
EXACTLY
REPRODUCES
THE ALFA
INLET = 235
EX. = 230

THREE CAM FORMS GIVE
FOUR ALTERNATIVE TIMINGS.
  
  


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