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Old Oct 15, 2014, 05:46 PM
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Xenon I got this recipe from someones build here on Rcgroups and it really works well - 50/50 combo of Daps fast and final light weight filler and Durhams rock hard putty . I had the same issue with the glue ridges . The filler combo really works well . You won't regret it . The Daps is user ready and the Durhams is a powder you mix first until you have a thick pancake batter , then mix with the Daps . Do yourself a favour and get a Dremel Sander , if you don't already have one ..
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Last edited by pencon; Oct 15, 2014 at 05:55 PM.
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Old Oct 15, 2014, 05:47 PM
I don't like your altitude
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Joined Sep 2011
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Originally Posted by xenon20 View Post
Thanks for your links guys. Stupot the stuff you linked to looks fairly similar to the 'big boy' stuff I have been lent, I wonder if it might be worth trying a combination of this and / or lightweight spackle, and some WBPU. I will run some tests as I have these materials to hand.

Nice one ! will report back.
The filler works fine by itself.Spackle is water based(I think)so I doubt it will mix.
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Old Oct 15, 2014, 05:50 PM
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Originally Posted by cetorca View Post
NO, it's a KFIR C10, Own design and steep learning curve on foam work. I've always been a Balsa ribs guy but started foam since I bough a CNC hot wire machine.
Kfir is an awesome looking Jet , looks improved from the Mirage .
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Old Oct 15, 2014, 06:02 PM
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I did an experiment with one of the canards and covered it with white Weld Bond glue and newspaper , let it dry and then a coat of WBPU . Very light and very strong . Might just go this route with the whole thing . It'll be a paper mache Saab . Sticks very well to this kind of foam . If any of you guys have experience with the minwax water based stuff , is it better to go a couple of coats and then sand ? I only have one coat on and it is a little lumpy looking .
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Old Oct 20, 2014, 10:44 AM
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Germany, RP, Nittel
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Had a little accident with mine, hitting a small metal pole, hidden in the grass, at high speed. I had a roll of carbon laying around, so lets make the new wing out of that. It has live hinges made of aramid fiber for the control surfaces, which I still need to cut free. The canards have elevators now as well, also hinged the same way. I haven't decided yet where to put the servo's for them though.
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Old Oct 26, 2014, 02:55 PM
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Funny how any pole in a flying area always seems to be a magnet to be hit
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Old Oct 27, 2014, 01:44 PM
EDF rules... :)
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Funny how any pole in a flying area always seems to be a magnet to be hit
Absolutely!

Eric B.
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Old Nov 28, 2014, 07:06 PM
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Mexico City
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Originally Posted by pencon View Post
. If any of you guys have experience with the minwax water based stuff , is it better to go a couple of coats and then sand ? I only have one coat on and it is a little lumpy looking .
I sanded after each coat when I did the Viggen and after 4 coats the weave of the fiberglass still shows if you look closely. I used spackle to fill but I'm not very happy with it. It is very light but it seems not to stick very well when you come to very small imperfections like the fiberglass weave.
In my actual project I only passed the sandpaper (320) ever so slightly to remove any rough spots, applied 4 coats without spackle and it looks a lot smoother . Then just after 2 coats of spray can primer the surface looked very nice with no weave visible. But it's not a mirror finish still because lots of small details start to show.
Now I have applied like 6 coats of primer using automotive filler after each coat and sanding it all down again to the base coat and I'm getting close to the mirror finish. I have thinned the filler to be quite thin, let a drop fall on the low spot and then smoothen it out with my fingertip.
Lots of work, but pays off.
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Old Nov 29, 2014, 09:52 AM
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United States, WA, Shelton
Joined Feb 2012
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Just a suggestion. Mix Talcum powered (baby powder) with the WBPU to a consistency of thick pancake batter and apply over the FG weave. It sticks great and fills/sands easily. It turns out super smooth and smells nice doing it
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Old Nov 29, 2014, 10:31 AM
Do it Right, the first time!
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United States, MN, Hermantown
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LT is right on-- some baby powders use cornstarch-- it won't mix at all .
if it were me I'd give it a thinned coat of epoxy finishing resin. Not much more weight, stronger, more ding resistant, and a superb finish-- It will need to be wet sanded with 400-600 grit paper, however.
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Old Nov 30, 2014, 05:34 PM
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Norway, Oppland, Vestre Toten
Joined Feb 2014
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Thought I give you Viggen fans a little treat. I took these pictures 3 years ago when I visited Sweden with the Norwegian army They also had one standing ready to take off on the apron in Swedish, green splinter camo that day, one of the few still flying.

Added some pic`s of the little Draken for you Saab Draken builders. This could be a cool edf project. enjoy
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Last edited by Skunkwork; Dec 03, 2014 at 05:16 PM.
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Old Dec 01, 2014, 11:59 AM
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Great pics Skunkworks , must have been cool to see it in person ..
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Old Dec 01, 2014, 12:41 PM
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Norway, Oppland, Vestre Toten
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Thanks Pencon. We where at the nearby shooting range and after we were finished we went to the small museum at the location. Actually on the way home to norway I saw another Viggen on a pole just beside the highway when leaving Gævle city.
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Last edited by Skunkwork; Dec 01, 2014 at 06:03 PM.
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Old Dec 02, 2014, 12:29 PM
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That two seater looks great . Mine"s been on hold a while now . $$ is tight this year it seems . Hope to get back to it once I buy a few parts , landing gear is going to be next , but that could be in spring next year .
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