Rolls-Royce Archives
         « Prev  Box Series  Next »        

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 of a 112° masked camshaft and a 114° unmasked camshaft, plotting B.M.E.P. against R.P.M.

Identifier  ExFiles\Box 13\2\  02-page154
Date  2nd December 1931 guessed
  
R.M.P. 31.
COMPARISON OF 112° MASKED CAMSHAFT AND 114° UNMASKED CAMSHAFT
OPEN EX. C.R 4.7 HIGH LIFT ROCKERS. TWIN CARBS 1-4 CHOKES
MASKED SHAFT, INLET LIFT .547 EXHAUST LIFT .469
114° SHAFT E.62448
VALVE LIFT INCREASED TO .525

Graph Labels:
A
B
C

Axes Labels:
R.P.M
B.M.E.P
IND. DEPN. INS. HG.

Timing Circle A:
HIGH LIFT ROCKERS
.020 CLCE
EX
IN
Numbers: 21, 3, 11-2, 49, 44, 68

Timing Circle B:
HIGH LIFT ROCKERS
.020 CLCE
EX
IN
Numbers: 29, 5°, 4°, 54-4, 36-3, 60-3

Timing Circle C:
.020 CLCE
EX
IN
Numbers: 52, 2-2, 7.5, 49
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙