#1
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Touching up papered fins during construction
I'm looking for tips.
I used blue masking tape to mask epoxy fillets on my Apache build. When I pulled the tape, some of the paper on the fins lifted with it. So I have some small fuzzy patches. How do I repair before painting? CA and sand? Wood filler and sand? Something I haven't thought of?
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Charles McGonegal Ciderwright AEppelTreow Winery & Distillery Ad Astra Tabernamque! |
#2
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I'd CA and sand. Start with 220 grit and finish with 600 grit. Primer and sanding should take care of the rest.
Later! OL J R
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The X-87B Cruise Basselope-- THE Ultimate Weapon in the arsenal of Homeland Security and only $52 million per round! |
#3
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Thinned white glue and sanding might also work. Thin with alcohol rather than water. I used that on a body tube once whose glassine coating I'd pulled off (long story) and it worked great.
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Rich Holmes Camillus, NY Secretary / newsletter editor Syracuse Rocket Club http://richsrockets.wordpress.com |
#4
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CA will work, however if the fuzzies are not over long (stand more than 1/32" tall) you could just hit them with primer and sand smooth, both methods have worked for me.
Rex |
#5
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What flavor alcohol to thin with? I have sorghum, apple, pear and blackberry, all in the 130-150 proof range.
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Charles McGonegal Ciderwright AEppelTreow Winery & Distillery Ad Astra Tabernamque! |
#6
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Which do you use for rocket fuel?
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Rich Holmes Camillus, NY Secretary / newsletter editor Syracuse Rocket Club http://richsrockets.wordpress.com |
#7
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Quote:
I'll second that. I use CA to make sure the paper does not lift at fin edges. Easy to sand, just use a fine sandpaper as Luke suggests and take it slow until you get the feel for it. For fins with a straight leading edge, I make a one-piece paper cover and crease along the leading edge, giving a very nice, and smooth, tapered leading edge.
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Lee Reep NAR 55948 Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor In the Paint Shop: Nothing! Too cold! Launch-Ready: Farside-X, Maxi Honest John, Super Scamp |
#8
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I also do the one piece paper wrap.
I used thin CA and it mostly worked pretty well. I had one little spot on an edge I was sealing (not the lifted patches) that decided to swell up in a lump like CA does sometimes. I might file that one down. More targeted than sanding. I have a nice collection of needle files. One small patch is in the lower right corner. I don't have a picture handy of the big one.
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Charles McGonegal Ciderwright AEppelTreow Winery & Distillery Ad Astra Tabernamque! |
#9
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Quote:
That technique makes those fins STRONG. And you don't even have to use heavy paper...........I use the kind of tissue paper that ladies are forever sticking in bags that have gifts. You can get a lifetime supply (comes in a wide range of colors too) at your dollar store for a buck. By the way, I've found it easier to use thick CA. I put on a bead of the stuff and spread it thin with an old credit card. Great adhesion and works like a charm. If there's any lifting of the paper at an edge, I use thin CA there. Joe |
#10
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I tend to use self adhesive labels - sometimes printed with the fin pattern. I use it for cutting and the papering at once. Not with the leading edge wrapped, though. I have mixed results with the self-stick - even weighted under books overnight. I'm experimenting with other glues.
The fins in this case are 5 layers - paper, 1/16" balsa, tyvek, 1/16" balsa, paper. I plan on pushing the sustainer pretty hard.
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Charles McGonegal Ciderwright AEppelTreow Winery & Distillery Ad Astra Tabernamque! |
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