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Old 10th Aug 2010, 23:28
  #1858 (permalink)  
Join Date: Mar 2003
Location: BC
Age: 72
Posts: 2,452
I haven't seen a schematic for the RTLU, but I suspect that a worm screw driven device creates a "feedback" position that inhibits hydraulic pressure to the operating rams beyond the set point. In this respect, the RTLU position is utilized by both port & starboard rams.
RTLU schematic below.

There are six "stops":

Rudder Pedal Stops - non-adjustable, which limit pedal maximum travel
Pedal Travel limitation unit - PTLU - limits maximum pedal command
Servocontrol input linkage fixed stop - limits masimum servocontrol command
Rudder travel Limitation Unit - limits the masimum input to the servo controls
Rudder Travel Stops - non-adjustable servocontrols stroke-end stops
Rudder Structural Stops - when servo controls are not installed

Note - There is no special stop between the rudder and the structure of the vertical stabilizer.

Last edited by PJ2; 10th Aug 2010 at 23:41. Reason: Getting the sizes right
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