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Guys (and girls),
Do a search for aircraft laminating or structures, see how many are built using polyester...and NOT crappy addon bits like fairings/wheels covers. Normal poly can NOT be vacuumed due to residual styrene. Poly is brilliant stuff, don't get me wrong. How many boats sail around the world every year built from cheap poly and chopped mat? (A lot!) but for better bond strength, and stronger laminates, epoxy is simply better. Epoxy makes a better mold for hulls also due its' vastly lower SHRINKAGE rate. I have heard little argument about vinylesters though. This stuff is very good. Bonds like epoxy, laminates like epoxy, VACUUMS like epoxy (in the right form). Quite a few aircraft flyng now using VE. No resin system is difficult to measure or use, what is it with drops and cups and that ****? Read a book on ratios...poly being 100:1(weight/volume) resin catalyst (or whatever) 100 grams = 1ml of hardener...how bloody hard is that? Go to a chemist (drug store) and buy small and medium syringes, and/or eye droppers. MEASURE the catalyst for the correct ratio after you WEIGH the resin and you should never have any problems. Research what you need, research how you use your chosen material, research the methodology...don't ever guess. Use the experience, education and knowledge of the resin supplier. Why the hell would they say...mix ### ratio of resin to hardener in such and such a temperature and humidity and not really MEAN IT! If you build a boat/plane/car/spaceship whatever and don't read the instructions, and the structure ****s itself, you have nobody to blame other than yourself. Just don't involve others in your foolishness, like needing to be rescued, or generally needing your hand held because you know better than people with doctorates in chemistry. Enjoy Rod. |
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