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Author Topic: CA Filletts  (Read 1508 times)

Offline James Mills

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CA Filletts
« on: March 01, 2013, 07:51:11 PM »
I remember watching a Windy video where he used CA for the fillet's.  Anyone else tried this?

James
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Offline Paul Walker

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Re: CA Filletts
« Reply #1 on: March 01, 2013, 08:41:24 PM »
No. I have used balsa for fillets on my last 3 planes. Should have done that years ago!
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Offline Dan McEntee

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Re: CA Filletts
« Reply #2 on: March 02, 2013, 12:57:54 PM »
   I believe there was more to it than just CA glue. You need a build up of something like spackling compound for size and shape. Paint doesn't stick to this worth a crap, so to promote paint adhesion, this is where the thin CA came in, and you soaked the fillet with CA and then sanded. I think I'm remembering it correctly but could be wrong. There are about six different ways that this can turn into a disaster and there are several better ways to get good results these days. I wouldn't even consider it. I have been using finish cure epoxy and micro balloons for quite a while now and will stick with that method. You only mix up as much as you need, it applies and smooths out easy, it adds strength to the wing joint, and I've NEVER had paint lift off of a fillet done this way. Any method you use will require practice to perfect, you should just choose one and stick with it.
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Offline RC Storick

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Re: CA Filletts
« Reply #3 on: March 02, 2013, 01:57:50 PM »
James use superfil
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Offline FLOYD CARTER

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Re: CA Filletts
« Reply #4 on: March 02, 2013, 06:32:05 PM »
I used balsa once a long time ago.  I remember doing it in small pieces to make curves.


Do you start with triangle stock?  I would certainly soak the heck out of it to bend it

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Offline Paul Walker

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Re: CA Filletts
« Reply #5 on: March 02, 2013, 08:42:13 PM »
No soak. I use my punk balsa for this. I have a piece of 4 pound 1/4 inch that I cut into 1/4 inch square pieces. Cut to length and then carefully trim to mostly a triangle section. Titebond in place.
For the section around the LE, short sections are tapered to fit together.

Once the glue is dry, glue sandpaper to a do well, mask around the edges, and then sand. At 4  pound stock, it is easy to sand. It is sometimes necessary to add a small amount of filler at the edges to get a perfect fair.

I don't know how to get a lighter fillet.
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Offline Avaiojet

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Re: CA Filletts
« Reply #6 on: March 03, 2013, 06:33:11 AM »
There's a difference between making a "Fairing" and just useing a material just as a "Filler."

Charles
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Offline James Mills

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Re: CA Filletts
« Reply #7 on: March 03, 2013, 08:30:53 AM »
Quote from: Dan McEntee on March 02, 2013, 12:57:54 PM
   I believe there was more to it than just CA glue. You need a build up of something like spackling compound for size and shape. Paint doesn't stick to this worth a crap, so to promote paint adhesion, this is where the thin CA came in, and you soaked the fillet with CA and then sanded. I think I'm remembering it correctly but could be wrong. There are about six different ways that this can turn into a disaster and there are several better ways to get good results these days. I wouldn't even consider it. I have been using finish cure epoxy and micro balloons for quite a while now and will stick with that method. You only mix up as much as you need, it applies and smooths out easy, it adds strength to the wing joint, and I've NEVER had paint lift off of a fillet done this way. Any method you use will require practice to perfect, you should just choose one and stick with it.
   Type at you later,
    Dan McEntee
I'd have to go back and find the video, I think it was one of the Spitfires but he made the fillets out of thick CA, no spackling.  It just semed to me it would be hard to sand smooth.  I think I'm either going with Spuperfill or maybe try balsa fillets.

James
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