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).
Effect of various car alterations on top water temperature at different speeds.

Identifier  ExFiles\Box 29\3\  Scan271
Date  1st September 1930 guessed
  
VALUE OF VARIOUS ALTERATIONS TO
CAR CONDITION.

75 M.P.H.
Alterations in top water temperature from standard un-ventilated condition.

C.O. opened.
3°C. drop

Radiator shutters removed.
No difference.

Head and spot lamps removed.
2°C. drop.

Ignition retarded 9 degrees on flywheel.
2°C. rise

Fan removed.
5°C. rise

All out 80 M.P.H.

Fan removed.
8°C. rise

Gear ratio reduced 6%
1°C. rise
  
  


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