Hand laminated then vacuumed with clothes storage bag. Glossy epoxy finish, and then spray can paint over that. I know it's the trailing edge, because water seeps from the trailing edge slowly when I get back home. Small droplets form at the trailing edge slowly. I weighed the wing, it's taken in about 50 grams of water in one session.dirk8037 wrote: ↑Wed Jan 06, 2021 10:20 pmhandlaminated? How is the finish? Spackle and gloss or nothing.
How do you see that the trailing egde is the cause?
I would suggest to check for pinholes. With thermal differences from land to water and the bending under load while flying one tine hole can mess up everthing.
The boards and wooden core wings I built with the same epoxy and glass are water proof. But these wings are not:( There's probably something more to it. Maybe the air inside...tomtom wrote:laminate is almost always porous
I have oversize holes filled with epoxy.TheJoe wrote: Are you sure it is the trailing edge? I am thinking it might be leaking in thru your bolt holes. If you did not do a solid infill on them or fill them before laminating them.
These wings have an infill pattern that will prevent foam from spreading, but for future wings, I may choose an infill pattern that can be filled with foam.downunder wrote: Make two tiny holes apart, fill with 2 part PU foam from one hole...
I already used cubic infill, but that's probably not enough to make it waterproof. As for extrusion width, with a 0.4mm nozzle I sometimes go up to .6mm wide extrusions. Maybe it leaks at the seams. I do not remember what kind of seam placement I picked.fluidity wrote: ↑Thu Jan 07, 2021 10:15 amCubic infill. It forms closed pockets. You can't print with big layer height though, the infil walls slope at about 45 degrees. Also, change your extrusion width from % to absolute, say you have a 0.4mm nozzle, set the extrusion path to 0.45mm. This will lay down wider tracks that seal better over the layer underneath.
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