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General Aircraft: Tips & Techniques
Discussions on specific A/C building techniques.
Checking seams advice
Wad_ware
_VISITCOMMUNITY
Illinois, United States
Joined: September 09, 2002
KitMaker: 537 posts
AeroScale: 437 posts
Posted: Tuesday, August 15, 2006 - 06:02 AM UTC
Hi all
I am working really hard on the seams on my P-47 and really want to try to get them as good as I can for the NMF finish I want to put on it.
What are some of the different ways that the rest of you check your seams? I am sure there are many different ways and am eager to listen and learn.
Thanks everyone,
Wayne
jRatz
_VISITCOMMUNITY
North Carolina, United States
Joined: March 06, 2004
KitMaker: 1,171 posts
AeroScale: 151 posts
Posted: Tuesday, August 15, 2006 - 06:44 AM UTC
Once I think I've finished seams, I clean up the surface (dust & junk) then spray on primer to give it a uniform color finish.

Then I shine a penlight across (ie, perpendicular to) the seam from each side ... that catches the really subtle ones and is the same technique judges use ...

Another way is pictures -- nothing like a good sharp close-up photo to show flaws like seams, gaps, glue spots, etc ...

John
Darson
_VISITCOMMUNITY
Victoria, Australia
Joined: June 14, 2005
KitMaker: 247 posts
AeroScale: 60 posts
Posted: Tuesday, August 15, 2006 - 07:09 AM UTC
I can't add a heck of a lot to what John said I'm afraid. Priming will usually pick up most of the problems with seams, but a good close up pic will really show how well you've done.
MiamiJHawk
_VISITCOMMUNITY
Kansas, United States
Joined: April 07, 2005
KitMaker: 1,225 posts
AeroScale: 0 posts
Posted: Tuesday, August 15, 2006 - 07:26 AM UTC
Hello again Wayne:

I think John really hit the nail on the head re your question and Victoria
Darren substantiated it. I will just add another wrinkle. Instead of air-
gunning primer on the model to look for flaws, I spray on chrome silver
paint in a very thin coat, just along the seam area in question.
Everything shows up, . . . that isn't completely smooth. Or, . . . . if there
is a rescribed panel line that isn't straight as a string. And the
only other thing I would suggest besides John's and Darren's worthy
comments is to pick up a mirror and look at the model, the seam area in
particular in the reflection of the mirrow, with a bright light overhead, of
course. As John indicated, in an IPMS event/contest the judges will check
out all the seams, on top and below, if you're at the Nationals. Yes, they
pick up all the models and look at the undersides. And so I ALSO want to
say, be sure all the alignment of parts are right on the money as well. I was
amazed at the IPMS Kansas City National of how many really beautiful NMF
models had landing gear that wasn't at the correct angle or perpendicular
to the wing, if THAT was supposed to be the case. I'm amazed at the number
of contest modelers who work hours on their model but don't take time to
come up with a fool proof travel box that guarentees that their model
won't become damaged in transit.
Wad_ware
_VISITCOMMUNITY
Illinois, United States
Joined: September 09, 2002
KitMaker: 537 posts
AeroScale: 437 posts
Posted: Wednesday, August 16, 2006 - 05:23 AM UTC
Thanks for the help everyone,
With all you advice I really hope I can get everything looking real good.

Wayne
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