Dave - once again you're my hero! I've been struggling with this problem for several hours and like you tried some of the suggestions from the forum with the same PITA frustration. You've validated the KISS premise and saved me from taking a 3 pound hammer to the rib out of frustration. Dave B's anti-fluting counter-frustration pliers (AFCFP)! Thanks!
Interestingly enough, you actually did "shrink" the flange by applying your anti-fluting pliers. By pulling the material up, further from the rib's web -- raising the flange, so to speak -- without actually stretching the metal, you create tension that will pull the bow in the wing thickness direction out of your rib. Good job, better to think about this for four days and come up with a good solution as opposed to working for several weeks and wind up with a unsatisfying result.
I guess that's true, however it was never suggested to use it in this way. Everyone appears to be using a " push stick" to stretch the flange and that is a PITA....
Day late here, I'm sure you're finished by now... But Eric Newton covers this in his builder's book, I think? I adapted a 5/8" wood dowel rod to attach to my 3X rivet gun. I laid the rib flat and tapped lightly around the hole with the dowel in the rivet gun. Flattened them out and finished all ribs in a few minutes. The enemy of good is better. Earl Luce said one time about building planes. Measure with a micrometer, mark it with a grease pencil and cut with an axe.
crazy idea but here we go, why dont you just form the mold so its convex and not flat? that should compensate for the negative distortion at the top of the rib. when it pops out of the mold it should be flat.
YOU ARE WORRYING TOO MUCH ABOUT THE STRUCTURAL ASPECTS. EVERY TIME YOU BEND METAL ,YOU INDUCE SOME KIND OF STRESS, STUCTURAL ENGINEERING IS APPROXIMATE, AND THE STRESS YOU ARE CAUSING IS NEGLIGIBLE
Dave - once again you're my hero! I've been struggling with this problem for several hours and like you tried some of the suggestions from the forum with the same PITA frustration. You've validated the KISS premise and saved me from taking a 3 pound hammer to the rib out of frustration. Dave B's anti-fluting counter-frustration pliers (AFCFP)! Thanks!
I'm in admiration of All of you scratch Builders... I think I would scrounge and save and just order the ribs kit.
Interestingly enough, you actually did "shrink" the flange by applying your anti-fluting pliers. By pulling the material up, further from the rib's web -- raising the flange, so to speak -- without actually stretching the metal, you create tension that will pull the bow in the wing thickness direction out of your rib. Good job, better to think about this for four days and come up with a good solution as opposed to working for several weeks and wind up with a unsatisfying result.
Nice work, Your doing good!!
anti-twist smooth jaw plier! You invented it.
Good job.
Good video. I learned something.
The ribs are either .025 or .032 as per the plans. You can do the conversion to metric but they are more than adequate. :)
I guess that's true, however it was never suggested to use it in this way. Everyone appears to be using a " push stick" to stretch the flange and that is a PITA....
Day late here, I'm sure you're finished by now... But Eric Newton covers this in his builder's book, I think? I adapted a 5/8" wood dowel rod to attach to my 3X rivet gun. I laid the rib flat and tapped lightly around the hole with the dowel in the rivet gun. Flattened them out and finished all ribs in a few minutes.
The enemy of good is better. Earl Luce said one time about building planes. Measure with a micrometer, mark it with a grease pencil and cut with an axe.
crazy idea but here we go, why dont you just form the mold so its convex and not flat? that should compensate for the negative distortion at the top of the rib. when it pops out of the mold it should be flat.
I don't think it matters
when you assemble the wing all of your worrying takes care of itself😃
"...oversized these holes by 3/4" ... HOW? [Video num.?] Thanks!
Dear sir what is the thickness in mm? Isn't a little thin? Thanks
YOU ARE WORRYING TOO MUCH ABOUT THE STRUCTURAL ASPECTS. EVERY TIME YOU BEND METAL ,YOU INDUCE SOME KIND OF STRESS, STUCTURAL ENGINEERING IS APPROXIMATE, AND THE STRESS YOU ARE CAUSING IS NEGLIGIBLE