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Rob's REBVAIR Project
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Date:  6-14-2018
Number of Hours:  4.00
Manual Reference:  
Brief Description:  Pitch Servo Install: Part 1

On the rebel, the elevator is controlled by two cables, each one in tension. Based on Ron Shannon's website, I knew that I could use a capstan servo on this flight control. Since I am using a GRT Sport EX EFIS, the logical (only?) choice was to purchase their capstan servo for this application.

Regrettably, it did not come with any instructions, but by piecing together old Trutrak instuctions, some images on google, and comments from GRT tech support, I am documenting by installation here for anyone who may wish to follow in my footsteps,

Image 1 shows my custom fabricated servo bracket in the forefront. I fabricated the custom bracket, not expecting to receive a factory bracket in the shipping box. While the thickness of the material is similar in both brackets, there is one key feature that precludes the use of the factory bracket: if you look closely at the thin strip of at the top of the bracket (bridge), you'll see that the width is not enough to also accept the capstan cage cut-outs. On my bracket, I was fortunately left with about 1/4" of bridge material.

Image 2 shows my very beefy brace.

Image 3 shows how the servo must be able to be inserted into the back of the bracket, for ease of servicing.
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standard v. custom bracket

standard v. custom bracket

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rear of custom bracket

rear of custom bracket

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servo test fit

servo test fit

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