John Slade Posted January 30, 2004 Share Posted January 30, 2004 Note: This is just "off the top" based on my own experience. Others may argue points and techniques. Thats great. You're milage may vary. There is no right or wrong way. This is just what worked for me. You'll learn what works for you. This, and further discussion is intended to give you a starting point.... The fuse sides will be your first big layup. Make sure everything you'll need is at hand and the cloth is cut slightly oversize and ready to unfold. Use cheap gloves so you can pull them off if you need to take a "break". Don't even start if the ambiant temp is below say 65F. 72 is much better. The part must also be at these temps. If the part is at 55 and the air has just been warmed to 75, you'll have trouble with the epoxy wetting out. Use all slow epoxy from a hot box and have a hair drier handy. Lay the first ply. Get the threads straight, then go pump 3 or 4 squirts. Paint the stuff on quickly not worrying about any gaps. Go for max coverage. Moving quickly, do about a 4 sq ft area. Now get you're hair dryer and start stippling (up and down with the brush) dipping in the pot and warming the part ahead of you as you go. The white areas will start to go dark. Once you have the whole area pretty much dark move on to the next 4 sq ft area, pumping 3 or 4 squirts when you run out of epoxy. If you're brush starts to go a bit hard, dump it and grab a new one. Same with the pot of epoxy. You need to get that stuff out of the pot and onto the part as fast as you can without just dumping it on. Work quickly. Once the first ply is all dark squeege it lightly to remove serious globs of excess, but mostly just lay the next ply on top, pull it straight and then start in at the stipple stage. The excess from the first ply will soak through and wet out the second. Now stipple and paint to get the second ply all dark. Keep going and follow all the instructions in the plans. When you're done, and the last ply is done, lay 4ml clear plastic over the top, wet you're sqeege with epoxy and squeege through the plastic. If it starts to go white you're pressing too hard. Lift the plastic locally and add more epoxy. You should see the bubbles moving ahead of the squeege, and the color change is obvious behind it. Work from the middle outwards. Expect globs of epoxy to come out of the edges. Where the part curves and the plastic wants to crease, cut it with a blade or scissors and let it overlay itself. Once the plastic has been squeeged do your final check of the layup looking for any white spots, clean up you're tools, wipe the brush and put it in a bottle of MEK, wipe out the epoxy cup and then go check the plans to be sure you followed all the details correctly. Keep some epoxy to do a scratch test. Let it cure overnight, even if it looks cured 4 hours later. Next day you'll have the sides of you're airplane. I hope this helps someone. Quote I can be reached on the "other" forum http://canardaviationforum.dmt.net Link to comment Share on other sites More sharing options...
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