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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).
Unsuitability of a damping material for a brake drum flange and proposing consultation with Ferodo for an alternative asbestos-based fabric.

Identifier  ExFiles\Box 26\4\  Scan157
Date  28th July 1922
  
Wd.{Mr Wood/Mr Whitehead} From BY.{R.W. Bailey - Chief Engineer}
c. Hs.{Lord Ernest Hives - Chair}
c. Mr D'aeth.

X719
BY3-P28.7.22.JUL

RECEIVED STAMP

RE DAMPING MATERIAL ON THE FLANGE OF THE BRAKE DRUM.

The material which I am handing you herewith is not flexible enough to enable us to bend it on edge. At the same time it is possible that there may be a lot of cotton in its composition, as it appears like this to me from examination, and this being so, it would be quite unsuitable for this reason, also, as the brake drums get so hot at times that the material would be burnt and charred away.

Would you take the matter up with Messrs. Ferodo and ask them whether they have not got something in the nature of a loosely woven asbestos which could be bent on edge and which would stand riveting up between two flanges where one of the flanges was going to get remarkably hot, without damage of the fabric being charred away.

The proposal is one which in its essential features demands the qualities which I think the Ferodo Company must have encountered in producing their present material, and I certainly think their advice should be obtained in regard to this matter.

BY.{R.W. Bailey - Chief Engineer}
  
  


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