Hi guys! Feel like I got a good fit on the spar stiffeners. I used the table saw like a planer to true them straight, and shaving them down to the height that was slightly taller than the I.D. of the spar. Then I set the blade to a 10 degree angle and ran them down the 4 corners. Just shaving the stiffeners left burn marks on them. When I sanded out the marks out and tried them, they fit perfectly. Now I'm going to varnish them with Poly-Fiber epoxy varnish. I know, after varnishing, I'm gonna have to do some more sanding since I've got such a good fit without. How many coats would I want on the stiffeners, and the ribs too for all that matter? Another question: Is there any kinda of lube I could use to slide them in place? It just takes time! ,Like I said, I'm gun-shy about drilling the rivet holes for the strut attachments on the spars. I'm thinkini' that I'm gonna leave the attachments hose clamped, attach the wings to the fuselage and drill/cleco the holes in place. I feel like this would insure their exact location. Am I nuts?
Ed, would you do me a favor and post a picture of those aluminum stiffeners? If I don't like the result with the wooden stiffeners, I would like to have the option of using the aluminum. Contingency! Wyatt
Thanks Ed! Put the check in the box, but the mailman must've come early. Oh yeah! Checks in the mail! Beefed up the spar stiffeners today. Take note of the clamps. Thanks JimChuk! I'll be workin' on fittin' them in the spars. The plan is to use a sanding pad on a grinder and just go slow. Any other ideas would be appreciated! Looks like a long process to me. Wyatt
Howdy boys! I was gone, but now I'm back at it! Have the ribs glued to the spars with a 3/4" washout and have the strut attachments fit. 80" center of the bolt holes to the root end of the spars. I also have the fuselage attachment elevated above the spars 36" c-c. Boys, I got to tell you, I'm gunny about pokin' the holes in the spars! Those are the only measurements that I have. Is there anything else I would need to check? I have the attachments held in place with hose clamps and have 1/4" of thread showin' at the rod end. I really wish the other strut had adjustment too. Tomorrow, I figure on setting up the spar stiffeners with 4 pieces of 1/4"X 3/4" birch plywood to make an"I" beam. What would be easiest way to profile the stiffener to fit the I.D. of the spar? I'll be using Poly-Fiber epoxy varnish for a sealer. The way I see it, the only thing that holds the stiffener in place are the rivets from the spar attachment. Ain't a lot, but I guess it's enough. Well, that's enough to keep me busy for a bit! Keep me straight! Wyatt About forgot! Can I buy a mounting for my wing tip position light or would I have to make it?
Yessir, 35 1/2" c-c! On the intial glue, there are only 2 long ribs to be glued. The remaining 3 are 2 trailing edge ribs behind the tank and the tip rib. It's gonna be critical to get these first ones right! Also, there are 3/32" holes drilled in the left wing spars. These were drilled for a drag tube that won't go there, the fuel tank goes there instead. Guess they kinda missed that! Any ideas what to do about those holes. I was gonna put rivets in 'em, but a friend said that they may rub a hole in the tank. He said JB weld, but I'm thinkin'........Ideas? Wyatt
Thanks guys! I sure look forward to smelling MEK again! I've missed it since my Challenger rebuild. I bought some syringes down at Wicks that I was gonna try to use to apply the glue. Do I want to use cotton flox too? Doug, what do you mean, a garrote? I have fiber reinforced strapping tape to strap and twist the front and rear spars tight. Is that what you meant? Wyatt On my way to buy the stuff. Ain't gonna get much else done today. It's a nice day here in central Illinois and I'm flying!
BHi Guys! Back at it again, wing buildin'! I'm ready to start gluin' ribs. Got a couple of questions before I start. First, the washout: Are y'all in agreement that 3/4" would be good? And second: Degreaser for 9460 glue prep. I have what came with the kit and I also have this paint surface cleaner that I have leftover from my Challenger. What'cha think? Wyatt
#8 wasn't bad. You can use the laminations of the cap strip to gauge your depth when takin' them down with the Dremel. They turned out fine. I'll get the rest of the ribs on and fit the drag tubes. Then, I gotta ask again, 1" WASHOUT? I did read somewhere 3/4" may be even better. I am gonna use my tanks and build a couple of more TE ribs outa birch plywood just like the others. Should I use the 9460 I bought to glue the cap strips to the web or use something else? The glue on the rest of the ribs is kind of a light brown. When it comes to using the cotton flox, that's just a thickener not for strength isn't it? Also, on the strut attachments, microballoons were mentioned to use when gluing them on the spars. I must confess, I'm not familiar with either one. Keep an eye on me boys! Wyatt
HI guys! Finally back to wing buildin! I've cleaned and inspected the spars. There were some minor scratches which were lightly filed and sanded out. I'm thinkin' they're in good shape, no major defects. Got the ribs ready to go and am sliding them on. There is a small place on the trailing end where the rib web comes through the cap strip that could use a little filler. What should I use? Before I get 'em all on I need to whittle on rib #8 so it will fit over the strut attachment. The front spar end of the rib is no problem, but the rear spar opening is gonna be a little hairy, I've got to take down the inside of the cap strip so it'll go over the bracket. There sure ain't gonna be much left when it goes over the bracket. I think I can cheat a little on the opposite cap strip (top) to slightly enlarge the OD. I don't think it will change the profile enough to make any difference. When I get #8 fit, I'll get the rest of them on. Do you guys still think a 1" washout is good? I even thought I read, 3/4" would be better! I'm figurin' on making a couple of more trailing edge ribs to stay consistent with the wing design. By gusseting the forward end and using the the aluminum trailing edge I think the ribs would be structurally sound. I bought 1/4" marine plywood for all the gusseting, the drag tubes too. Is good, or do I want different? It'll be birch ply for the ribs themselves. The gun's gone off and we're out of the blocks.....26K! Wyatt