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 New-Hudson Ltd discussing uneven brake lining wear on a Bentley car and proposing modifications.
| Identifier | ExFiles\Box 120\2\ scan0164 | |
| Date | 21th May 1937 | |
| REGISTERED TRADE MARK NEW-HUDSON Ltd PROPRIETORS OF ST.{Capt. P. R. Strong} GEORGE'S ENGINEERING WORKS TELEGRAMS: WONDER-BIRMINGHAM TELEPHONE: CENTRAL 7921 (6 LINES) CODES: A.B.C. 5TH EDN. BENTLEYS SOLE MANUFACTURERS OF THE GIRLING BRAKE THE BEST BRAKE IN THE WORLD CONTRACTORS TO H.M. GOVERNMENT WAR OFFICE . G . P . O.{Mr Oldham} COLONIAL AND FOREIGN GOVERNMENTS ICKNIELD STREET BIRMINGHAM-18 OUR REF. AF/AL. DATE 21st May 1937. Handwritten: 1029 Messrs. Rolls Royce Ltd., D E R B Y. Dear Sirs, For the attention of Mr. Martindale. RE BRAKES ON BENTLEY CAR. This confirms the visit of Mr. Girling and the writer to you on Wednesday last re the above. It would be of material assistance in setting out the internal levers for the second trial set of brakes if we could measure the thickness of the linings which were removed during recent tests. We understand that there was as much as 3/32" difference in wear between the four linings in one axle. It is apparent that part, at least, of this inequality may be due to the movement of one shoe in each drum being controlled directly from the expander, whereas the co-operating shoe is controlled via two rods and a reversing lever. The two rods and the lever together with their various pivots will cause a smaller travel of the second shoe when forcibly applied and, therefore, less wear in its lining. We could correct this tendency by modifying the proportion of the reversing lever, so as to cause a rather more rapid movement of the second shoe, but the exact proportions can only be determined by measuring the worn linings. These would need to be labelled so that we knew the co-operating pairs. | ||