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Old 03-08-2005 | 01:47 PM
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seanreit
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From: Cedar Park, TX
Default RE: Isobar Build Thread

Just a couple more pics I took before I left for FL jets. This stuff is now going into primer. I got asked at FL jets what my process is once I resin up the wings. I actually go at it with 80 grit to knock off what I can. Contrarry to popular belief, I believe all the strength is built into what you build with foam and balsa and hard woods. In other words, I don't worry at all if I knock through a little glass here and there. The primer will fill that in just fine. In fact, on my edges/ caps, I don't add glass at all, I just put a thick coat of reson on there, shape scratch up with sand paper and then primer it on up. If you look back through this build, you'll see I've capped the wing and other places with 3 ply to 5 ply. This adds some weight, but I believe I can take out a landing light now and not have to worrry about anything breaking (a dent maybe), but I'll be flying.

So I glass, knock off what I can and then hit it with K38. I then again go after it with 80 grit getting back as best I can to the resin. This gives me assuredness that I'm back to the airfoil as good as best I can, and I've filled in some low spots.

I then hit it with K38 again and this time I'm on it with 320 and a foam sanding bar rather than metal. I make these small foam sanding bars that hit contour really well. I may do the priming process four times or more on a surface. But I take a lot of primer off with the sanding process.

My final sanding prior to paint or panel lines will be wet 400. If I have a major dent I use a catalyzed automotive filler such as that stuff that starts with "E" can't remember the name right now. Really thin stuff.

Enjoy, and I'll be back on this to show some more priming stuff on Thursday. This jet will be all hooked up and sitting on gear sometime next week. I'll be stuffing servos by next weekend.

It's really coming together well.

Sean
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