RE: Ed's Ziroli B-25 Build
After reading all the posts today I decided to go ahead and glue W-8 in place. In my last update I showed my makeshift jig to try and keep the rib straight and vertical .... I modified it a little.
The rib had a slight bow (warp) to it and no matter how careful i am, (as I have learned in the past) there will be a gap somewhere on the joint between the two wing panels. So I had clamped a piece of angle aluminum to the rib. This kept the rib straight as an arrow, but made aligning everything a major pain in the butt. So I had a brain storm today at work.
If I glued a piece of light 1/4sq down the long axis of the rib while holding it perfectly flat on the table, it should then keep that perfect flat shape. so I gave it a shot.
Worked like a champ. I made a small notch in the spar so it would fit, (1/4 sq is glued to the inside of the rib as you can see in the pics), laid my large piece of angle aluminum on the plans even with edge of W-8, and then used the triangles to square everything up. You can also see the small piece of angle aluminum I used on the trailing edge to verify and hold all rib trailing edges on the same plane. Used 30 min epoxy on this rib to ensure it was plenty strong and that i had time to line everything up. Very satisfied with how it came out. Once i get the bottom sheeted, I will go back and clear the wood from the wing tube hole. Nobody will ever know its there!
Last pic is my extra 300 I just finished building from Model Aviation plans I got back in 2004. Totally different construction techniques, but it gave me the courage to tackle the B-25.