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 graph comparing different Bentley cylinder head configurations, materials, and compression ratios.

Identifier  ExFiles\Box 86\1\  scan0065
Date  9th March 1934
  
B.V.22
COMPARISON OF CYLINDER HEADS (BENTLEY)
UNIT - B.4.A.
1    ALUMINIUM CYLINDER HEAD (COMPRESSION RATIO 7.38:1)    LEC3LLS
2    CAST IRON             (COMPRESSION RATIO 7.38:1)

NO AIR SILENCER - INLET 1.450
OPEN EXHAUST - EXHAUST 1.200

4    STANDARD HEAD - INLET 1.40
    E.B. 615
    COMP. RATIO 6.45        EX: 1.30

B.H.P.
B.M.E.P. (LBS/☐")
R.P.M.

VALVE TIMING (.020 CLEARANCE)
T.D.C.


EXH
INL.
51.5°
49°

R.M.
9.3.34
  
  


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