Cantilever Geometrie: Unterschied zwischen den Versionen

#The individual cantilever's mechanical advantage is the ratio between the pivot-cable distance (PC) and the pivot-shoe distance (PS) . The pivot-cable distance (PC) is at its greatest when the anchor angle is 90 degrees, so that PC and PA are the same. Some authorities recommend adjusting the length of the transverse cable accordingly, but I believe that this is an over-simplification. With wide- and medium-profile cantilevers, the mechanical advantage of the cantilever unit increases as it travels inward, increasing as the brake shoes wear down. With narrow-profile cantilevers, the mechanical advantage tends to decrease as the cantilever travels inward. The mechanical advantage of a typical cantilever is generally between 1 and 2. Medium-profile cantis tend to have more of this type of mechanical advantage.

#A larger contribution to the mechanical advantage of a well-adjusted cantilever brake, especially a low-profile one, comes from the transverse cable. The mechanical advantage is strictly determined by the "yoke angle ". The formula is:<br>Mechanical Advantage = 1/sin yoke angle<br>For readers without slide rules I have calculated a few examples: [How quaint :-) John Allen]

A 90 degree yoke angle would result from an infinitely long transverse cable, such that each side of the cable was running vertically down from the cable yoke.