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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).
Analysis of radiator water temperature and the critical atmospheric boiling point.

Identifier  ExFiles\Box 29\3\  Scan148
Date  25th November 1924
  
Contd.
-4-
Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG25.11.24.

The difference between the top and bottom radiator water temperature is approx. 10°C, it actually varies slightly with the speed. When therefore the mean radiator temperature gets to 95°C, the car will be boiling.

The critical atmospheric temperature therefore is 95°C - St .

Rm.{William Robotham - Chief Engineer}
  
  


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