SIG Something extra space where wing joins fuse - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 12-01-2004, 07:18 AM   #11
Ed Smith

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What is the brand name of the resins you use? How do you mix the two, quantities of each? I would like more information on the use of Microballoons and resin. Any info you could provide would be appreciated!
Hi Gary,

Microballoons is a very fine usually white powder (There are other varieties). The powder is actualy tiny hollow glass spheres, I have no clue how it is made. It is simply mixed with resin to make a paste. the more balloons in the mix the easier it is to sand. It can then be used as a filler for patching holes and making fillets. Even though the filler is fairly stiff it will droop if too thick and not supported. It is not a good idea to use it on untreated balsa surfaces. The filler dries hard and fairly strong. If the wood is sanded then there will be a bump sticking up where the surrounding softer wood has been sanded away. I use it on glass fuselages and any balsa surface that has already been glassed.

I will not use polyester resin. That stuff should not be in the house. One tiny drop of the hardener in the eye and the sight WILL BE LOST. The hardener cannot be washed out quick enough. I use only epoxy resin. There are several quality brands around. West Systems is well known. I use a German product, MGS. When I mold my fuselages I mold and join them all at the same time. I need three hours working time. West Systems slowest hardener did not give me this. There are two hardeners available for MGS, a slow and a fast. The slow will allow about five hours working time while the fast fifteen minutes. They can be mixed to achieve ones desired working time.

I use this resin for everything. Molding fuselages etc, molding props, gluing wing skins, finishing resin for glassing balsa surfaces and of course fillets etc.

I do a lot of glass work and buy all of my materials in bulk from Composites Canada, Timberlea Blvd, Mississauga. (Previously, Fibreglass Factory Outlet)

Any help or advice is gladly given.

Ed S
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Old 12-01-2004, 09:55 AM   #12
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there are also phenolic spheres (brown), not just glass. and when mixing, its important to FOLD the mixture, not stir so hard as to break the spheres.
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Old 12-01-2004, 02:06 PM   #13
Dave Holmes
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Originally Posted by voyager_663rd
there are also phenolic spheres (brown), not just glass. and when mixing, its important to FOLD the mixture, not stir so hard as to break the spheres.
Good tip! Makes abundant sense, but I would never have thought of it on my own. thanks!

Dave Holmes

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