What is used to fill the spirals on a body tube

ac2fv

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I'm starting a Loc Warlock build soon, and want to fill in the spirals on the body tube. What is a common/good filler to use for that purpose?
Thanks!
Scott
AC2FV
 

neil_w

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Welcome to the forum.

Such questions should be directed to the "Techniques" subforum, or perhaps the HPR subforum since that's a high-powered rocket. This forum is for meta-discussion of the forum itself.

As for spiral-filling techniques, @Spitfire222 covered it but there have been many, many, many threads about this topic, so a bit of searching should find you lots of good info.
 

hcmbanjo

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Here's a bunch of seam filling posts from my blog.
After the one pass of CWF (Elmer's Carpenter's Wood Filler) and sanding,
then a moderate spray of Duplicolor Filler/Primer (FP101) and sanding follows.
Two steps. Fill balsa grain, tube seams and even launch lug seams.
 

neil_w

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Here's a bunch of seam filling posts from my blog.
After the one pass of CWF (Elmer's Carpenter's Wood Filler) and sanding,
then a moderate spray of Duplicolor Filler/Primer (FP101) and sanding follows.
Two steps. Fill balsa grain, tube seams and even launch lug seams.
FWIW this is where I started (thanks to Chris’s blog) and it worked excellently for me.
 

samb

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Yes, water thinned CWF is what I use as well. Run, don't walk, to Chris Michielssen's blog for his detailed tutorial.
Avoid any Elmer's filler product with Pro or Max in the title, anything with real wood fiber in the ingredients.
FWIW, Elmer's CWF has disappeared from the Home Depots in my neck of the woods.
 

jahall4

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I'm starting a Loc Warlock build soon, and want to fill in the spirals on the body tube. What is a common/good filler to use for that purpose?
Thanks!
Scott
AC2FV

If you are going to make the effort, why stop at the spirals? ;-) Just filling spirals will not give you the glass like finish you see on part of the rocket below. Interested in what will?
 

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John Kemker

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Funny you should mention that, as I just put a LOT of Bondo Glazing and Spot Putty on my LOC 4" Goblin. Thankfully, my 4" AMW Der FiberMax won't need spirals filled. [whew!]
 

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Back_at_it

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When I did mine I shot on three or four good coats of high build primer which took care of a bunch of the spirals. Once that was cured I used DAP brand wood filler and literally covered the entire body tube. Mine had an unusual amount of waves and bumps that needed to be addressed so covering the entire tube was the right thing for that rocket.

Good news is the DAP stuff sands extremely easy so a couple of quick passes with 100 grit knocked off the high spots then 220 and I believe 400 grit. If I had to do it again I would primer and fill the tube before building as handling a rocket that big with the fins attached wasn't easy.

Here are a couple of pics from that point of the build. You can see where there were low spots as there is still visible filler on the rocket.

W36.jpg W39.jpg
 

Lee

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If you are going to make the effort, why stop at the spirals? ;-) Just filling spirals will not give you the glass like finish you see on part of the rocket below. Interested in what will?
Okl - what will?
 

jahall4

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Okl - what will?

All it takes are a few coats of filler primer sanding radial between each coat (depending of course on the surface of the tube and depth of spirals) Light coats sanded back to the high points. Will look something like the picture below. Resist the temptation of spraying thicker coats between sanding. All that will do is increase the amount of time you spending sanding. This technique works regardless of substrate and with glass you can wet sand. Always cradle the tube in something like a Macklin Jig. It Supports the tube and makes the sanding go faster, allows you to use 2 hands. I use Duplicolor Filler primer. Typically lay down a first coat in Red so I can see when I have sanded back to the base (https://www.duplicolor.com/product/filler-primer/)
 

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