Ok, let's test fit the wings and see how they go together. If we did a good job with the dihedral gauge when placing the W1 rib then the two halves should join up correctly. Cross your fingers and here we go.

Remember, we are test fitting now. DO NOT GLUE ANYTHING YET

Find the Dihedral Tip Gauge (DTG) and pin it to to bottom of the outside W5 rib on one of the wing tips as in picture #1 & #2 (either side will do. Pick whichever side is easier for you). Once you have the DTG in place this will lift up one wing tip (3-3/4”) to the proper dihedral angle (picture #3), the other wing will lay flat on the building board. This will set the proper dihedral angle for the wing. Slide the two wing halves together by joining the wings using the dihedral braces. As when we were test fitting the braces, do not force this together. If it snags any when you are sliding them together please stop and figure out what is causing the binding, don't just force it! Pictures #4, #5, #6, and #7 show the wing halves sliding together. Once they are together you want to check for a good fit. Both W1 ribs should be in complete contact with each other. If there are any gaps at the top or the bottom of the joint stop now and fix it. Don't force it, and don't assume you can correct with epoxy or filler. Take the time to make it fit correctly now. If the joint is a bit off use a sanding block to remove a bit of material at a time until they fit properly. Go slowly and check often for the proper fit.

Once you are satisfied with the fit then we will move on to joining the two wing halves.

Pictures
1. Placement of the Dihedral Tip Gauge (DTG)
2. Make sure the DTG is straight up and down.
3. The DTG will raise the wing tip 3-3/4” off of the work surface
4. Getting ready to dry fit the wing halves
5. Slide the wing halves together
6. There should be little or no gap between the wing halves
7. A tight fit between the two wing halves
8. A look from one wing tip to the other
9. Both wing halves joined together in a test fit
10. Both wing halves joined together in a test fit

Until next time

Ken