I couldn't do too much with the ASTs when I was ready for them. If you'll recall, the two piano hinges were lost in the shipment. Since I got all the replacement parts.. and since I'm done with the HS.. I thought it was a good time to go back and finish these up.
As a refresher..
I had previously sanded the edges, alumiprepped and primed the inside skin, ribs, and the outside skin that mates with the piano hinge.
The piano hinge was cut to 33 eyelets, and the drilling template was used to drill holes under each eyelet. There are two ways to use the template -- pay special attention to the notches in the template. With the AST hinge, the notches sit up against the eyelets. With the HS, they do NOT sit up against the eyelets. Of course, the holes were deburred and the hinge was cleco'd in place.
The bottom skin was cleco'd and riveted, along with the AST spar. There was a question as to whether the horn's rib's flange sat inside the spar OR between the spar and the skin. After reviewing the diagrams closer, it sits inside inside. The question was raised because it might seem more appropriate to have the spar (thick material) sandwich the rib flange (thin material).. but whatever.. thats how it was designed for whatever reason. I tried my best to keep all the material clamped down before pulling the last pop rivet on the leading edge skin.. can't really use a cleco to help.
The AST Control Horn was riveted. The hinge was riveted in place. Be sure that there is ONE open hole next to the Control Horn, as seen in the above diagram.
After that, the top skin, including the top leading edge is cleco'd and riveted.
The ASTs are really straight forward and I'm surprised Van's didn't have this as the first part to be assembled. Things to note here is that the rib that the Control Horn is attached to is different than the other 3. Also note the direction that the flanges go.
The tabs are done.
As a refresher..
I had previously sanded the edges, alumiprepped and primed the inside skin, ribs, and the outside skin that mates with the piano hinge.
The piano hinge was cut to 33 eyelets, and the drilling template was used to drill holes under each eyelet. There are two ways to use the template -- pay special attention to the notches in the template. With the AST hinge, the notches sit up against the eyelets. With the HS, they do NOT sit up against the eyelets. Of course, the holes were deburred and the hinge was cleco'd in place.
The bottom skin was cleco'd and riveted, along with the AST spar. There was a question as to whether the horn's rib's flange sat inside the spar OR between the spar and the skin. After reviewing the diagrams closer, it sits inside inside. The question was raised because it might seem more appropriate to have the spar (thick material) sandwich the rib flange (thin material).. but whatever.. thats how it was designed for whatever reason. I tried my best to keep all the material clamped down before pulling the last pop rivet on the leading edge skin.. can't really use a cleco to help.
The AST Control Horn was riveted. The hinge was riveted in place. Be sure that there is ONE open hole next to the Control Horn, as seen in the above diagram.
After that, the top skin, including the top leading edge is cleco'd and riveted.
The ASTs are really straight forward and I'm surprised Van's didn't have this as the first part to be assembled. Things to note here is that the rib that the Control Horn is attached to is different than the other 3. Also note the direction that the flanges go.
The tabs are done.
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