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 Ferodo Ltd. requesting specific brake linings and discussing cast-iron brake drum efficiency.
| Identifier | ExFiles\Box 141\3\ scan0040 | |
| Date | 14th February 1931 | |
| X719 Dept. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}2/KT. 14th February 1931 Messrs. Ferodo Ltd., Sovereign Mills, Chapel-en-le-Frith. Dear Sirs, For the attention of Mr. Longley, Chief Chemist. With reference to your memo, Works JNL/BMP. We shall require the brake linings to the following piece nos. Front Brakes, two sets to G.77757. " one set " G.79094/5. Rear Brakes, two sets " G.78255. " two sets " G.74743. We should be much obliged if you will give us particulars in loss of efficiency when using cast-iron brake drums of various mixtures. We are at the moment trying a set of centrifugally cast brake drums supplied by the British Piston Ring Co. We have not at the moment got the specification of the material, but probably you may have had dealings with the Firm. You mentioned a Firm who is specialising in cast-iron, would you please let us have the full particulars. In regard to letting you have a brake drum complete with shoes for test purposes, we shall be pleased to loan you a set in due course. We are sending you a drawing of the friction lining of the servo showing the position of the indents. Yours faithfully, For Rolls-Royce Ltd. | ||