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).
Common faults in 4-wheel brake systems and the R-R method of brake adjustment.
| Identifier | ExFiles\Box 73\3\ scan0244 | |
| Date | 1st November 1924 guessed | |
| contd :- -3- R-R BRAKE ADJUSTMENT. Two common faults inherent in the majority of 4-wheel brake systems at present on the road are :- (1) After considerable alteration of the single point adjustment, the levers have moved through XXX such large angles that a very considerable reduction in the initial leverage has taken place through the tendency to toggle. (2) It is perfectly possible to adjust a brake up too closely and hence cause it to rub. The first of these objectionable features is entirely eliminated by the R-R method of adjustment at the camshaft. The second fault is more serious than might be supposed. Ferodo is very susceptible to high temperatures which entirely alter its co-efficient of friction. Once therefore a brake has been over-heated, further prospects of equalisation disappear. The R-R method of adjustment by inclined serrations on the brake operating lever make it impossible for anyone to set up a brake shoe too closely without using exceptional force. This type of adjustment must necessarily be operative on each brake independently, and hence the most satisfactory position for its incorporation is on the camshaft. As with the introduction of Front Wheel Brakes, the rate of brake lining wear has been contd.. | ||