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Jul 31, 2013, 02:40 AM
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Fiberglass mold conclusion

Wood was sanded down to form the curve.

Drawing the model outline on the mold ended up very important.

But it ended up covered in the body filler step. Bondo was pure hell, having only 3 minutes of working time, chipping off & forming divots.

That was as smooth as it could get. Fortunately, Bondo seemed unnecessary.

Since the entire mold was covered in scotch & packing tape.

Then covered in car wax. Unfortunately, didn't cover the entire area in packing tape & wax, making the release difficult.

Fiberglass layup was an itchy mess. Getting the cloth flat on the curve was impossible. It took 2 layers of cloth. There was a lot of excess resin & air pockets. The 5 minute working time limited it to 1 batch for the balance beam & 1 batch for the wing.

Packing tape & wax ridges showed up.

Air pocket

The model outline showed through the fiberglass, allowing it to be retraced on the fiberglass.

The completed model was horrendous & weighed more than the equivalent wood model. Many more copies would have to be made. During this process, realized there was probably an easier way to use wood. It took so long & cost so much money to make 1 fiberglass part, it probably won't be done again.
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Aug 04, 2013, 10:46 AM
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What were you trying to make?

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