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Thatcher CX-5 Build Log
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Date: 5-2-2020
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Number of Hours: 0.00
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Manual Reference:
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Brief Description: Skinning the Wing Stubs Part I
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I just had a call from another builder who was wondering how exactly I skinned the starboard wing stub on N74SG. It occured to me this was probably some information that might be euseful to others, so here goes:
First, I made the four paper templates in the first picture. In point of fact, only Template D, seen in the second picture, is paper. The other three templates are cardboard. The surface is mostly flat, and the bigger problem is having paper patterns sag, not any issues with bending cardboard.
Template D lets me know how much skin there should be between B and C. Figure 2 shows a copy of the wing root nose taken from the plans. I rolled it out to determine the length of Template D. When it comes time to make the nose skin, template D is taped in between B and C as a spacer. The outboard edges of B and D are a striaght line.
Picture 3 shows a deviation on N74SG from the plans. Per plans, the skin of the wing walk is pretty fragile. I'm not a small guy, and I don't fancy telling people over and over again to be careful where they walk or they'll damage my wing. I reckon that'll put them off flying pretty fast...
In any even, the top drawing shows the 'per plans' skin arrangement, and the bottom drawing shows mine. Effectively, I'm doubling the skin on the top of the wing forward of the main spar. On the side intended for regular ingress and egress, I've made the mostly flat top skin out of 0.032" 6061-T6, and the nose skin out of 0.025" 6061-T6. On the side not intended for regular use, both skins are 0.025".
Lastly, the bottom picture shows a little red bit. That nose rib template from the second picture? I applied some temporary adhesive to that, and stuck in onto the fuselage skin. When the nose skin is in place correctly, it should now line up with that template.
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