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Date:  8-28-2018
Number of Hours:  2.50
Manual Reference:  Section 8; DWG 23
Brief Description:  Adjusted Elevator Push-Pull Rod

While completing the TruTrak DigiFlight IISVSG Autopilot Configuration, the Elevator-Pitch Servo control arms extended beyond their operating limits, so I needed to adjust the Elevator Push-Pull Rod at both ends. I removed the push-pull rod and extended the rod-end connectors so when the pilot & co-pilot control sticks were exactly vertical the elevator was level with the horizontal stabilizer and the Elevator Servo Control Arm was centered vertically on the servo. It took a little bit of adjusting, but I was able to get the Elevator-Pitch Servo Control arms so they extend about 100 degrees and don’t extend past their limits. The servo remains secure and does not flex the mounting brackets at the extremes of the servo-arm travel. I also made some adjustments so that any “lost motion” in the linkages was eliminated to maximize the performance of the autopilot. (The manual says any lost motion (dead zone) in the linkages will result in wandering or slow “hunting” behavior in flight.) Even though I dropped the linkage washers about 20 times and had to blindly search for them in the tail section with a magnet, it was actually fun to work on something other than computers and electrical wires!
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Stick Exactly Vertical

Stick Exactly Vertical

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Elevator Level with Stabilizer

Elevator Level with Stabilizer

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Push-Rod Adjusted to Servo Arm

Push-Rod Adjusted to Servo Arm

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