Monday, December 28, 2009

Wing Rib Gusset Glueing & Nailing

Now that the Christmas rush is over in the embroidery shop I'm back to building wing ribs while working on other projects. I've realized there are some things which could use some more explanation.

When mixing the glue I've found that mixing by volume vs by weight is the easiest. I've also found that the amount of glue needed to put all the gussets on 2 sides of a rib is exactly the amount using 4 teaspoons of Liquid Resin with 3 teaspoons of Powdered Catalyst. I've found that clear plastic drink cups work great. Recently I got some shallow clear plastic pill dispensing cups, they're even better, harder to spill. I use a metal teaspoon since it's easy to level the catalyst with a popsicle stick. It's also easier to wash the metal spoon clean after measuring each ingedient to make sure the unused portion in the can is not contaminated. One of the nice things with Resorcinol is that it washes up with water until it cures and becomes waterproof.

I measure the catalyst into the drink cup and the resin into the pill cup. The drink cup is easier to poor from slowly while mixing in the pill cup. The 3rd cup in the picture is a gauge to double check whether I've put in the correct amount of resin.

I reuse the cup for the Catalyst so I've drawn a line on it as a double check in case I get interrupted while measuring.

That doesn't work as well with the Resin since I use that cup to mix the glue. Since the cups are clear I have a cup which I can set the Resin cup into to check that the correct amount of resin was measured. I also have a line on it for the volume after mixing which is less than the 7 teaspoon total.

I've made 2 little videos to help explain how to install gussets.

The first covers applying the glue, just to the areas needed.

The second covers using the nailer.

These methods seem simple and obvious but they reduced my time to build assemble and nail both sides of a rib from 2-1/2 hours to 1-1/2 hours. With so many ribs to build it's a big savings over holding the nails with pliers and using the tack hammer.

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