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 regarding the dispatch and specifications of Ferodo S.4947 brake servo linings.
| Identifier | ExFiles\Box 141\3\ scan0299 | |
| Date | 30th August 1934 | |
| All Communications to be addressed to the Company x719 FERODO LIMITED TELEPHONE: 19 CHAPEL-EN-LE-FRITH (4 LINES) TELEGRAMS: FRICTION, PHONE, CHAPEL-EN-LE-FRITH. FERODO BRAKE & CLUTCH LININGS REGD. TRADE MARK CODES: WESTERN UNION FIVE LETTER EDITION, BENTLEYS COMPLETE & 2ND PHRASE, MARCONI INTERNATIONAL, LIEBER'S CODE, LIEBER'S LATEST CODE, A.B.C. 5TH & 6TH EDITIONS. CHAPEL-EN-LE-FRITH, STOCKPORT, ENGLAND. Depots:- LONDON 222, TOTTENHAM COURT RD W.1. ABERDEEN 26, GUILD STREET. BELFAST 8, 10 & 12, MONTGOMERY ST BIRMINGHAM 198, CORPORATION ST BRIGHTON 84, QUEEN'S ROAD. BRISTOL 118, VICTORIA STREET. CARDIFF 39, CHARLES ST DUBLIN 120, UPPER ABBEY ST GLASGOW 70, WATERLOO ST LEEDS 25, HUNSLET RD LIVERPOOL 1-3, BERRY STREET. MANCHESTER 32, CATHEDRAL ST NEWCASTLE-ON-TYNE WORSWICK CHAMBERS, 10, WORSWICK ST OFF PILGRIM ST 30th August. 1934 YOUR REF. OUR REF. FJF/MD. Messrs. Rolls Royce Ltd., Derby. - For the attention of Mr. Grylls. Dear Sir, Brake Servo Linings We have pleasure in advising you that under separate cover we have forwarded today, three pairs of linings in Ferodo S.4947. In our experience this material gives a normal coefficient of friction of approximately 0.42 up to 500°F, it also has a very good wear factor. 550°F may be regarded as the useful maximum. We shall be glad to know the results of the tests on these linings at your convenience. Yours faithfully, FERODO LIMITED. F.J. Field p.p. Chief Engineer. | ||