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How to get smooth seams on airplane wings?

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  • Member since
    October, 2017
How to get smooth seams on airplane wings?
Posted by Jay Bones on Sunday, October 29, 2017 1:35 AM

Hello all.  New member here, and I have a question regarding how to get smooth seams on airplane kits that have the wings in 2 pieces- upper and lower.

 

I've tried using glue along the edge, but excessive model glue softens the plastic and is hard to look real.

 

I've tried Bondo and clear silicone, thinking that spray paint would cover and not be noticeable.  Also tried brush painting, never with very good results.

  • Member since
    August, 2014
  • From: Willamette Valley, Oregon
Posted by goldhammer on Monday, October 30, 2017 12:11 PM

I usually use a couple of coats of liquid cement on both halves, then clamp tight to get a little squeeze out.  Let dry completely then scrape and sand to profile.  Any "gaps" left I fill with perfect plastic putty (PPP),wiping flush with damp q-tip before it dries.

If it lets go because I let dry too much before clamping, will wick in some Tamiya thin to reglue while clamped.

 

Gaps between wing root and fuselage can be more problematic, but can be filled with stretched sprue, thin styrene sheet, etc. then finished with putty.

Have pretty much gone to PPP for ease of use and non-shrinkage

Silicone is a no-no, you'll find paint, glue, and anything else won't stick to it, and is a royal pain to get it all off to do repairs.

  • Member since
    September, 2012
Posted by GMorrison on Monday, October 30, 2017 12:17 PM

A trick that sometimes helps at the wing root is to glue the top halves to the sides of the fuselage before gluing on the bottom half.

  • Member since
    September, 2016
Posted by Retired In Kalifornia on Monday, October 30, 2017 12:56 PM

Dihedral checking for sure needs to be done before attaching wings & tailplanes. Kits like the ancient Airfix Savoia-Marchetti S.79 dihedral checking is particularly vexing given the top main wing halves slope downwards towards the tips, I just "do my best" in this regard. Resins are always nasty when it comes to wing attachments, just a few I've built argueably have "correct" dihedrals - and then there are biplanes...

Some, if not most, of the Regia Aeronautica Italia (RAI) monoplane fighters I've built had to be very sparing on wing attachment filling, couldn't lard on putty without sanding off wing root detail on the crappy FROG FIAT G.55 kit for example. The Delta 2 Aeronautica Macchi C.205V was another nasty, bare minimum filling, will "do better" with the other Delta 2 kit I've got.

The FROG Macchi C.202 is a joy to build some of the time, has large underwing wing gaps either side of fuselage center section, could cut out & add sheet plastic to fill them in but I won't be checking out the undersides that often. If for somebody's sake I'd build "a" model for an IPMS contest for sure there wouldn't be any gaps anywhere, finding the "perfect" RAI model to enter would be the challenge as near all I'd built have gap issues.

  • Member since
    January, 2014
Posted by Silver on Friday, November 03, 2017 9:15 PM

Make sure you get the gap leveled and straight.Sand the area lightly with a very fine sand paper then use “Perfect Plastic Putty “ .Apply it on the area then with a cotton swab wipe in a single straight motion.Let dry and sand lightly to smooth out.The product is on the internet .

  • Member since
    March, 2015
Posted by Peaches on Sunday, November 05, 2017 8:35 PM

Personally I use Tenx-7r or plastic trim glue and just hold the parts together especially if it's a monobody construction.  

WIP:
Academy F-15 (1/72)

On Deck 

MH-60G 1:48 (Minicraft)

C-17 1/144

KC-135R 1/144

Academy F-18(1/72)

Ting Ting Ting, WTF is that....

  • Member since
    September, 2016
Posted by Retired In Kalifornia on Sunday, November 05, 2017 9:30 PM

Peaches

Personally I use Tenx-7r or plastic trim glue and just hold the parts together especially if it's a monobody construction.  

 

Still have partial bottle of 7R handy but get better results with cyanoacrylates with difficult welds, they're a must with resins having built a whole lot of them this year.

  • Member since
    September, 2016
Posted by Retired In Kalifornia on Sunday, November 05, 2017 9:36 PM

goldhammer

I usually use a couple of coats of liquid cement on both halves, then clamp tight to get a little squeeze out.  Let dry completely then scrape and sand to profile.  Any "gaps" left I fill with perfect plastic putty (PPP),wiping flush with damp q-tip before it dries.

If it lets go because I let dry too much before clamping, will wick in some Tamiya thin to reglue while clamped.

 

Gaps between wing root and fuselage can be more problematic, but can be filled with stretched sprue, thin styrene sheet, etc. then finished with putty.

Have pretty much gone to PPP for ease of use and non-shrinkage

Silicone is a no-no, you'll find paint, glue, and anything else won't stick to it, and is a royal pain to get it all off to do repairs.

 

Most of the time I get by with Squadron White Putty, works with resins believe it not; models I've patched with it over a decade ago still holding up but they're in dust-proof display cases kept away from sunlight.

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