Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Work Bench > Building Techniques
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 08-06-2016, 09:13 AM
aeppel_cpm aeppel_cpm is offline
Ciderwright
 
Join Date: Apr 2013
Location: Burlington, WI
Posts: 633
Default 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?
__________________
Charles McGonegal
Ciderwright
AEppelTreow Winery & Distillery
Ad Astra Tabernamque!
Reply With Quote
  #2  
Old 08-06-2016, 10:52 AM
luke strawwalker's Avatar
luke strawwalker luke strawwalker is offline
BAR
 
Join Date: Dec 2007
Location: Needville and Shiner, TX
Posts: 6,134
Default

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
__________________
The X-87B Cruise Basselope-- THE Ultimate Weapon in the arsenal of Homeland Security and only $52 million per round!
Reply With Quote
  #3  
Old 08-06-2016, 11:10 AM
Rich Holmes's Avatar
Rich Holmes Rich Holmes is offline
Born Late Rocketeer
 
Join Date: Jul 2013
Location: Syracuse, NY
Posts: 568
Default

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.
__________________
Rich Holmes
Camillus, NY
Secretary / newsletter editor
Syracuse Rocket Club

http://richsrockets.wordpress.com
Reply With Quote
  #4  
Old 08-06-2016, 12:37 PM
Rex R Rex R is offline
Craftsman
 
Join Date: Feb 2011
Posts: 473
Default

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
Reply With Quote
  #5  
Old 08-06-2016, 01:25 PM
aeppel_cpm aeppel_cpm is offline
Ciderwright
 
Join Date: Apr 2013
Location: Burlington, WI
Posts: 633
Default

What flavor alcohol to thin with? I have sorghum, apple, pear and blackberry, all in the 130-150 proof range.
__________________
Charles McGonegal
Ciderwright
AEppelTreow Winery & Distillery
Ad Astra Tabernamque!
Reply With Quote
  #6  
Old 08-06-2016, 06:24 PM
Rich Holmes's Avatar
Rich Holmes Rich Holmes is offline
Born Late Rocketeer
 
Join Date: Jul 2013
Location: Syracuse, NY
Posts: 568
Default

Which do you use for rocket fuel?
__________________
Rich Holmes
Camillus, NY
Secretary / newsletter editor
Syracuse Rocket Club

http://richsrockets.wordpress.com
Reply With Quote
  #7  
Old 08-09-2016, 08:11 PM
LeeR's Avatar
LeeR LeeR is offline
Retired with Way Too Many Kits
 
Join Date: Jun 2007
Location: Colorado
Posts: 3,222
Default

Quote:
Originally Posted by luke strawwalker
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


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.
__________________
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
Reply With Quote
  #8  
Old 08-10-2016, 07:23 AM
aeppel_cpm aeppel_cpm is offline
Ciderwright
 
Join Date: Apr 2013
Location: Burlington, WI
Posts: 633
Default

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.

__________________
Charles McGonegal
Ciderwright
AEppelTreow Winery & Distillery
Ad Astra Tabernamque!
Reply With Quote
  #9  
Old 08-10-2016, 10:46 AM
mojo1986's Avatar
mojo1986 mojo1986 is offline
Old Canuck Modeller
 
Join Date: Mar 2005
Location: Kingston, CANADA
Posts: 2,160
Default

Quote:
Originally Posted by aeppel_cpm
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.




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
Reply With Quote
  #10  
Old 08-10-2016, 10:55 AM
aeppel_cpm aeppel_cpm is offline
Ciderwright
 
Join Date: Apr 2013
Location: Burlington, WI
Posts: 633
Default

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.
__________________
Charles McGonegal
Ciderwright
AEppelTreow Winery & Distillery
Ad Astra Tabernamque!
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 10:38 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2024