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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).
Test results for oil heat rise in a Bentley Unit C.XI engine at various RPMs.

Identifier  ExFiles\Box 131\1\  scan0099
Date  16th May 1933
  
X4693

Files.

16.5.33.

HEAT TO THE OIL.

BENTLEY UNIT C.XI.

6.28:1 Comp. Ratio. Wakefields' Castor P.2.
Balanced c'shaft EB.39.
S.G. = .962 } at 90°C.
Sp.{Mr Spinney}Ht = .530 }

3500 RPM.

Oil In. = 85°C. }
Oil out = 112.5°C } Heat rise = 27.5°C.
Circulation = 2.79 gals/min.
= 276.8 B.T.U's/Min.

3750 RPM.

Oil In. = 85°C. }
Oil out = 115.5°C } Heat rise = 30.5°C.
Circulation = 2.97 gal/min.
= 351.2 B.T.U's/Min.

4000 RPM.

Oil In. = 85°C. }
Oil out = 121.5°C } Heat rise = 36.5°C.
Circulation = 3.16 gals/min.
= 390 B.T.U's/Min.
  
  


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