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Covering Balsa USA Northstar with Minwax Polycrylic - Fuse Question

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Covering Balsa USA Northstar with Minwax Polycrylic - Fuse Question

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Old 12-13-2014, 04:07 AM
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hutchis
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Default Covering Balsa USA Northstar with Minwax Polycrylic - Fuse Question

Guys, I've covered numerous planes with ultracote, but am giving it a go with SIG Koverall on my latest project. This plane will be strictly a water plane, and I do not want the hassle of and lose seams, wrinkles, etc. Per the kit, I will be glassing the bottom of the fuse for extra strength, etc.

Is there any value in covering the fuse (all closed, non bay areas) with Koverall, or can I just seal this area with the polycrylic and paint?

Your input is appreciated.....

Hutch...

Last edited by hutchis; 12-13-2014 at 04:18 AM.
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Old 02-08-2015, 04:12 AM
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Hi Hutch, I'm giving this thread a bump because I'm gathering info to build my own Northstar (somewhere down the road, not in the immediate future). I saw your question and was also curious about the same thing.

Have you had any luck getting an answer to your question???

Bob
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Old 02-08-2015, 05:26 AM
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Hey Bob. I did not receive any responses to this thread, but went ahead and covered the fuse anyway. Good Luck...Hutch
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Old 02-08-2015, 05:49 AM
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Koverall is strong but heavy. I'd use 0.5 oz fiberglass put on with the polycrylic. Remember, polycrylic is not fuel proof and must be covered with a fuelproof paint. Paint also can get heavy quickly.

Good luck with your project!
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Old 02-08-2015, 08:47 AM
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I have used PolyC in the past with good results. It does add a lot of weight. I have since switched to the Stits Poly process. It takes fewer coats and their color coats are fuel proof.

2 coats of Poly brush, 2 coats of Poly Spray (fill the weave)and 2 coats of Polytone Color coat. With this you could skip the fabric if you had a solid surface. You may need an extra coat of Poly Spray which is a sandable filler.

Here is a pic of my 1/3 Cub just finished with these products.
Later!!
Anthony
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Old 02-08-2015, 05:06 PM
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Thanks for that info, guys. I may pass on the Polycrylic then... this plane takes about 16 oz of weight just to balance, so adding additional weight with polycrylic might not be the best path for me to follow.

Bob
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