Aircraft Skin Sag Techniques?

[Zank_Frappa]

Hi guys,

Currently I'm building a Fw 190D, and in looking at pictures of certain examples, I've noticed a fair amount of skin sag on various areas of the airframe. If you want a great example of this, just look at some of those older b52s.

Anyway, I was wondering if anyone has tried replicating this on any of their builds, and if so, how'd you do it?

I was thinking of gouging shallow trenches inbetween where the stringers should be with a #10 blade and then softening the area with tamiya liquid thin, but I dunno.

[Ivan Ivanovich]

"Stressed Skin Effect" tutorials: Rato Marczak Klaus Herold

 

HTH

 

[Zank_Frappa]

cool thanks

[Greg W]

7 hours ago, Zank_Frappa said:

Hi guys,

Currently I'm building a Fw 190D, and in looking at pictures of certain examples, I've noticed a fair amount of skin sag on various areas of the airframe. If you want a great example of this, just look at some of those older b52s.

Anyway, I was wondering if anyone has tried replicating this on any of their builds, and if so, how'd you do it?

I was thinking of gouging shallow trenches inbetween where the stringers should be with a #10 blade and then softening the area with tamiya liquid thin, but I dunno.

 

 

 

This book illustrates, I think, a great way to simulate the stressed skin effect. Greg

[thierry laurent]

I used a similar technique many years ago. Have a look here:

https://forum.largescaleplanes.com/index.php?/topic/29779-frankenzero/&page=2

 

[LSP_Ray]

52 minutes ago, Jennings Heilig said:

Skin sag?  Yikes, I sure hope not!

LOL!

Typically called 'oil canning,' at least in construction industry. Nothing like dealing with an architect who doesn't understand why all the flat sheet metal he designed over steel supports doesn't stay perfectly flat. "But it looks so bad..."