Torque Tubes

torque tubes

where an angular or twisting motion is needed in a control system, a torque tube is installed.
view b of figure 2-60 shows bow a torque tube is used to transmit motion in oppositedirections.
quadrants, bell cranks, sectors, and drums change direction of motion and transmit motion to parts such as control rods, cables, and torque tubes.

the quadrant shown in figure 2-60bis typical of flight control system linkages used by various manufacturers.
figures 2-60c and 2-60d illustrate a bell crank and a sector. view e illustrates a cable drum.
cable drums are usedprimarily in trim tab systems.
as the trim tab control wheel is moved clockwise or counterclockwise, the cable drum winds or unwinds to actuate the trim tab cables.

stops
adjustable and nonadjustablestops (whichever the case requires) are used to limit the throw range or travel movement of the ailerons, elevator, and rudder.
usually there are two sets of stops for each of the three main controlsurfaces, one set being located at the control surface, either in the snubber cylinders or as structural stops (figure 2-62), and the other at the cockpit control.
either of these may serve as theactual limit stop. however, those situated at the control surface usually perform this function.
the other stops do not normally contact each other, but are adjusted to a definite clearance when thecontrol surface is at the full extent of its travel.
these work as override stops to prevent stretching of cables and damage to the control system during violent maneuvers.
when rigging control systems,refer to the applicable maintenance manual for the sequence of steps for adjusting these stops to limit the control surface travel.



tubos de torsión
  
  donde se necesita un movimiento angular otorsión en un sistema de control, se instala un tubo de torsión.
  b vista de la figura 2-60 muestra el arco de un tubo de torsión se utiliza para transmitir el movimiento en direcciones opuestas....