stiffener for rudder skin?

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8475
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Joined: Sun May 26, 2019 11:38 am
Name: Dave Sprinkle
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Aircraft Type: 140
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stiffener for rudder skin?

Post by 8475 »

Hello everyone, take a look at the attached pic of my rudder. You'll note several rows of rivets in the center of the rudder skin. I know from peering into the rudder interior that these rivets are used to attach L-shaped stringers to the skin. I had initially presumed that these stringers were part of the factory design, but after reviewing the Univair bill-of-materials for a new rudder, I don't find any mention of these stringers. I'm now thinking that these were added to my rudder as part of a previous repair. Can anyone comment on this? Were these part of the factory design?
N76415 rudder right side, nov 2020.jpg
N76415 rudder right side, nov 2020.jpg (177.88 KiB) Viewed 1954 times
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6643
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Aircraft Type: 1946 C140/C90
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Re: stiffener for rudder skin?

Post by 6643 »

8475 wrote: Mon Nov 30, 2020 1:22 pmWere these part of the factory design?
No, but I've seen all sorts of "creative" solutions to distorted rudder skins.
meloosifah
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Re: stiffener for rudder skin?

Post by meloosifah »

Mine definitely does not have them and it’s a very original 1946 model.
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6898
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Re: stiffener for rudder skin?

Post by 6898 »

Looks like a repair the trailing edge should be welds like the leading edge is.
Jeff T 1948 C-140 NC3600V
Past President 120 140 Assoc. 2019-2023
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