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 from Ferodo Limited concerning brake lining rivets and materials, sheet 2.
Identifier | ExFiles\Box 141\3\ scan0223 | |
Date | 20th January 1933 guessed | |
From FERODO LIMITED. Sheet No. 2 Messrs. Rolls Royce Ltd., Derby. impair their strength during a long sustained application. Speaking generally, after a certain amount of lining has been worn away the rivet heads invariably come into contact with the drum and we are not aware of any serious trouble arising irrespective of the type of rivet, and we should say that cast iron or alloy cast iron and really good class steel drums would not be affected appreciably by running against either copper, brass or aluminium. In your case we would suggest copper rather than aluminium in view of the remote possibility of the temperature reached rendering the last named semi-plastic. We think you may accept that where the conditions of braking are not entirely destructive in character, copper rivets will be eminently satisfactory. In reply to the question in the last paragraph of your letter, the shoe certainly would reach a higher temperature in a shorter time with thin than with thick linings. We shall be pleased to carry out any experiments for you in the above connection. Yours faithfully, FERODO LIMITED. CHIEF ENGINEER. | ||