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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 discussing shock absorber foaming, lubricant mixtures, and the American Houdaille.

Identifier  ExFiles\Box 28\1\  Scan117
Date  10th February 1928
  
ROLLS-ROYCE
OF AMERICA, INC.
SPRINGFIELD, MASS.

X832

OY1.R.2.10.28

February 10th, 1928.

Mr. Robotham,
Rolls Royce Ltd.,
Derby, England.

Dear Mr. Robotham:

RE SHOCK ABSORBERS FOAMING

Replying to Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/L.G.13.1.28, I don't think we have proved foaming to exist. However the attached experimental report on the foaming of various oils, etc. may interest you.

30% castor and 20% alcohol seems to give best results and would probably be a fair lubricant for the parts of the shock absorber.

I think that the higher velocity factor which you say you need, actually exists in the American Houdaille.

Don't you think it would be well for you to try out a full set on the car, bump-test chronograph test etc? We have no accurate means of testing them here, but will gladly send you a set.

They seem quite excellent instruments and are being put on S. Ghost and Phantom cars by the owners to an alarming extent.

Very truly yours,

Maurice Olley

Encl.
  
  


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