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).
Letter to Cadillac Motor Car Co. regarding radiator cap pressure and a crankshaft testing rig.

Identifier  ExFiles\Box 170\2\  img061
Date  12th April 1932
  
Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/AD.

April 12th, 1932.

M.{Mr Moon / Mr Moore} Olley Esq.
Cadillac Motor Car Co.
Detroit,
Michigan, U.S.A.

Dear Oy,

Thank you for your letter of March 15th.

The radiator cap is really only used as a seal and blows off at 1 to 1 1/2 lbs/sq.in. This, of course, does not increase the oiling point of the system very much, but it does prevent water being thrown out after climbing a long hill when incipient boiling tends to take place.

I am getting you a photograph of the joggling ring in action and will try and get one of the crankshaft testing rig when next it is running.

Yours sincerely,
  
  


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