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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).
Letter regarding the danger of engine water boiling away unnoticed while driving, with a handwritten response.

Identifier  ExFiles\Box 24\4\  Scan004
Date  27th August 1912
  
Austria, 27th August 1912.

Dear F.H.R.,

The danger of not knowing that water has boiled away.

In ascending the Brenner Pass, I thought that by avoiding full throttle I had prevented the water from boiling. But at lunch time I found no water in sight on opening the tank cap. May there not be a danger of breakdown owing to the water boiling away without the driver knowing of it?

Yours sincerely,
C.J.

[Handwritten annotations]
[Left Margin]: X766
[Top left]: W. Boyes In Tech letter
[Below typed text]: It is more difficult than it would appear Mr. Johnson & I have decided that better not to show water boiling, indicator is difficult to imagine either a float or pressure or flow gauge that would be practical. decided to await for first practical indication of trouble from such a cause FHR
[Bottom right]: File Water Only
[Stamp 1]: OCT 23 1912
[Stamp 2]: 23 X 12
  
  


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