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Old Mar 25, 2007, 05:21 PM
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Spackles94's Avatar
Birmingham, Alabama
Joined Feb 2007
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Question
Is this wing damage worth fixing?

I've got this bit of wing that came loose -- it's probably a bit less than 1/2 inch by 1/2 inch or so -- from my Super Cub, at the right tip. I'll try to post a picture later.

So, is that worth fixing, or will it not affect the performance? After all, it's just a trainer...

Personally, I don't think I should fix it, but I'm very much so often wrong.

But, if I should fix it (no, I don't have the piece), how should I do it? Just use some packaging foam and Gorilla Glue, and then sand it?

Thanks!
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Old Mar 25, 2007, 07:25 PM
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Quote:
Originally Posted by Spackles94
But, if I should fix it (no, I don't have the piece), how should I do it? Just use some packaging foam and Gorilla Glue, and then sand it?
Yeah, that would work. Although you may not notice the performance difference with a chunk that small, I think you should fix it, if for no other reason that looks better. Besides, it's good practice for fixes you will have to make later.
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Old Mar 25, 2007, 07:29 PM
War Eagle!
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Birmingham, Alabama
Joined Feb 2007
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Good point. I'm sure I'll have to learn to make fixes, since I'll be sure to have worse crashes.

Can I just use Gorilla Glue and build it up instead, or should I still use a piece of foam?

Thanks!
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Old Mar 25, 2007, 07:52 PM
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I would use any glue sparingly; foam is going to be lighter. I haven't used Gorilla Glue but I know some folks in the scratch-built forum like it. I have used foam and a bit of hot glue for similar repairs, then covered the repair with clear packing tape to smooth out the wing surface. Although I have other glues now since I started scratch-building, I find hot glue to be most versatile for many kinds of repairs as long as you work fast.
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Old Mar 25, 2007, 08:23 PM
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Quote:
Originally Posted by Spackles94
I've got this bit of wing that came loose -- it's probably a bit less than 1/2 inch by 1/2 inch or so -- from my Super Cub, at the right tip. I'll try to post a picture later.

So, is that worth fixing, or will it not affect the performance? After all, it's just a trainer...

Personally, I don't think I should fix it, but I'm very much so often wrong.

But, if I should fix it (no, I don't have the piece), how should I do it? Just use some packaging foam and Gorilla Glue, and then sand it?

Thanks!
Depends on what it looks like. Some idiot crashed my Formosa into something and drove the leading edge of my left wing inwards about an inch. So it was like an inch wide, and an inch deep.

What I did was take packing tape and lay a piece about 2 inches wide on the top of the wing, then folded it over the edge and down under the wing. Guess what, the shape is perfect with the original wing! Even though there is nothing under the tape where the hole is, it conformed perfectly with the surface.

I've got to find the clown who keeps taking my planes out and screwing them up when I'm not looking...

Chuck
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Old Mar 25, 2007, 09:11 PM
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Birmingham, Alabama
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Chuck,

Thanks for the tip. Unfortunately, it's right in the middle of the right edge, so it's not a straight break like the one you had on the leading edge. It kind of looks like a semicircle (I'll take a picture...).

Can I shape/mold Gorilla Glue by using packing tape and then removing it, or will it expand too much?

Thanks!
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Old Mar 25, 2007, 10:55 PM
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always make repairs if possible. If repair is not possible, its time for a new model.

Note: repair is practically always possible if you are willing to make the effort. I had one model that before it was damaged badly enough in a single incident that it was finally written off, the only original parts of the airframe were the (carved balsa) wingtips.
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Old Mar 26, 2007, 09:41 AM
War Eagle!
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Cool, I'll go and do the repairs then it shouldn't be too difficult, that's for sure.

What kind of foam is best? Just some leftover packing foam? The damage is smaller that a packing peanut...
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Old Mar 26, 2007, 10:31 AM
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Packing foam works great. Cut it oversize then glue it in with hot glue. Carve it to shape. I use one of those small Olfa knives where the blade slides out of the handle about 2.5 ins. They are very sharp and cut foam like butter using a sawing action. You won't have to sand it as these knives cut very clean. You won't be able to tell where it's damaged and i'll never tell. Just got through putting two pieces back into the leading edge of the Reno Racer where I got hit with a prop strike doing combat yesterday.
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Old Mar 26, 2007, 10:43 AM
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For a break that small, I would use packing tape as Chuck suggested. Since you have a curved surface, use several strips about 1/2" wide. Start with the leading edge of the break and place one piece so that half of the tape is on the foam of the wing and the other half extends over the break. Do the same thing at the trailing edge. A third piece should now be able to span the other pieces. You won't have a perfectly round contour, but it will suffice and is much easier than building it up with foam.
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