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Rob's REBVAIR Project
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Date:  8-11-2013
Number of Hours:  5.00
Manual Reference:  
Brief Description:  Torque Tube Fitting

Since I am building in a 1.5-car garage, taking the wings on and off the plane is a big undertaking. I have them on now, since I just finished cutting the struts and drilling the attach holes to size, so I'm looking to at least get the final location of the torque tube (TT) hanger and cut/fit the TTs themselves before taking them off and putting the project back inside. In the first image, you see my TT hanger, wedged between two channels. Eventually I will be drilling 6 3/16" holes through that area to secure it. Those familiar with this part of the construction will not recognize the two 3/16" shims between the hangar bracket, and the stops provided by the bolt, which holds the control arm assemblies together. I'm using these to make sure I have the most 'play' possible once the TT is cut, because the entire TT essentially could 'float' on the bolts on the ends...the only thing preventing this will be the spacers and bolts that tie the two control arms together between the wing and fuselage (Image 2). Running out the fuselage (image 1) you can see the shorter of the two TTs, cut to size. Image 2 shows how it connects to the control arm between the two wings. You can also see the spacing between that arm, and the one inside the wing is about 3/16", but it can literally be as much as 0.5", or as little as 0.25". It's all very tedious to describe, but if you've done it (or are about to do it) it should make sense to you. It's not surprising to me however, that no one writes about this step because it is so difficult to describe. And I'm approaching it differently from the manual because I wasn't certain the standard measurements laid out in the manual would apply to my custom installation. I was right. My small TT is a full 1.25" shorter than prescribed in the manual. And the long one is
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Torque Tube Hangar w Shims

Torque Tube Hangar w Shims

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spacing between the two arms

spacing between the two arms

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