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).
Continued analysis of front brake snatching and thumps, with a proposed solution involving a stop.
| Identifier | ExFiles\Box 66\5\ scan0132 | |
| Date | 1st February 1927 guessed | |
| contd :- -2- The result is that the other end of the T. lever r.{Sir Henry Royce} moves further forward than its original position and slacks off the front brake ropes. The next time the brakes are applied the swinging link remains stationary and so the friction does not function. The front brakes are snatched on, and thumps occur. The trouble did not occur on 'V' series because by good fortune the jaw of the rod from r.{Sir Henry Royce} to the front brakes equaliser shaft provided a stop by toggling. It is no use putting a stop on the 'T' piece (as sketch) because the rear pull off springs are not strong enough to overcome the friction and move the swinging link unless they have to assist them the 2-1 leverage provided when the whole T. piece pivots about r.{Sir Henry Royce} Therefore in order to make the swinging link function and get the benefit of the friction for reducing brake thumps we must have a stop which will prevent the front brake ropes slacking off through excessive movement of point r.{Sir Henry Royce} on the T. piece. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||