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Cabin top attach - CS 4-4's or AN426-AD4's

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Deems Davis

Joined: 09 Jan 2006
Posts: 925

Posted: Thu Nov 09, 2006 11:36 am Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

What opinions are out there regarding which rivets to use to attach the 

cabin top to the fuse.  I noticed that Tim started out using 426's and 

then switched to CS 4-4's. what experience have people had either way. 

Do the CS 4-4's interfere with the interior install?.



Additionally, per previous posts regarding cracks and expansion between 

metal and fiberglass surfaces,  Has anyone  used the procedure that 

David McNeil posted regarding  applying a thin fiberglass tape over the 

seam?



inquiring minds want to know.

Deems Davis # 406

Finishing - ( A Misnomer ! )

http://deemsrv10.com/

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rene(at)felker.com
Guest

Posted: Thu Nov 09, 2006 11:59 am Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

I used the CS 4-4's and plan on using David's suggestion on covering the

seam.  I will let you know how it turns out.  I also put in the attach

points for David's seat belts, but have not installed the belts because of

my very slow pace on finishing the inside of the cabin.



Rene' Felker

40322

Finish........

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dlm46007(at)cox.net
Guest

Posted: Thu Nov 09, 2006 12:24 pm Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

CORRECTION: We are seaming around the windows and the rivet lines in the 

cowl to prevent rivet heads from working their way through the finished 

paint. We are not using a glass seam to cover the blinds in the lid 

attachment along the horizontal edge ----- only -----over the blinds on the 

top rear edge. Our goal is to prevent vibration of rivets in glass from 

working their way through the paint after a couple hundred hours. Just got a 

new camera and will attempt to show what I mean. We did it on my Glastar but 

missed a couple of places and it shows.

---

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Deems Davis

Joined: 09 Jan 2006
Posts: 925

Posted: Thu Nov 09, 2006 12:39 pm Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

What are folks doing about the fiberglass to fuse seam then? It's 

cosmetically not very attractive. I would prefer not to leave it open, 

And previous posts warned bout filling gaps in dissimilar surfaces with 

body filler, due to uneven expansion rates. Why wouldn't the fiberglass 

tape technique work for this as well?



Deems Davis # 406

Finishing - ( A Misnomer ! )

http://deemsrv10.com/



David McNeill wrote:



[quote] 



 CORRECTION: We are seaming around the windows and the rivet lines in 

 the cowl to prevent rivet heads from working their way through the 

 finished paint. We are not using a glass seam to cover the blinds in 

 the lid attachment along the horizontal edge ----- only -----over the 

 blinds on the top rear edge. Our goal is to prevent vibration of 

 rivets in glass from working their way through the paint after a 

 couple hundred hours. Just got a new camera and will attempt to show 

 what I mean. We did it on my Glastar but missed a couple of places and 

 it shows.

 ---

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Tim(at)MyRV10.com
Guest

Posted: Thu Nov 09, 2006 1:10 pm Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

Just use some epoxy with some colloidal silica and fairing

filler mixed in, and as you get closer to the finished

surface layer, don't use the silica.  You can easily blend

that seam into oblivion and sand it smooth, including

the rivets.  I'm sure the fiberglass tape method would

work, but I dont' think you need it there.



Tim Olson - RV-10 N104CD - Flying

do not archive

Deems Davis wrote:

[quote] 

 

 What are folks doing about the fiberglass to fuse seam then? It's 

 cosmetically not very attractive. I would prefer not to leave it open, 

 And previous posts warned bout filling gaps in dissimilar surfaces with 

 body filler, due to uneven expansion rates. Why wouldn't the fiberglass 

 tape technique work for this as well?

 

 Deems Davis # 406

 Finishing - ( A Misnomer ! )

 http://deemsrv10.com/

 

 David McNeill wrote:

 

> 

>

> CORRECTION: We are seaming around the windows and the rivet lines in 

> the cowl to prevent rivet heads from working their way through the 

> finished paint. We are not using a glass seam to cover the blinds in 

> the lid attachment along the horizontal edge ----- only -----over the 

> blinds on the top rear edge. Our goal is to prevent vibration of 

> rivets in glass from working their way through the paint after a 

> couple hundred hours. Just got a new camera and will attempt to show 

> what I mean. We did it on my Glastar but missed a couple of places and 

> it shows.

> ---

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dlm46007(at)cox.net
Guest

Posted: Thu Nov 09, 2006 1:24 pm Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

It may as well; we are checking with experts at the Big Airplane Co.

---

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speckter(at)comcast.net
Guest

Posted: Thu Nov 09, 2006 4:50 pm Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

Rough up the aluminum and it will work just fine.  I plan on doing it that

way.

Gary Specketer

40274



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billderou(at)yahoo.com
Guest

Posted: Thu Nov 09, 2006 8:17 pm Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

I scrapped the pop rivets and used AN426A-3-10 "soft rivets" and cut the length  to size. If you have already drilled the holes for pop rivets then use the AN426A-4. Set the rivet gun at 60 psi and hit it lightly. Crushing the fiberglass was a non-issue.



Bill DeRouchey

billderou(at)yahoo.com

N939SB flying

 



David McNeill <dlm46007(at)cox.net> wrote:[quote] --> RV10-List message posted by: "David McNeill" 



It may as well; we are checking with experts at the Big Airplane Co.

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dlm46007(at)cox.net
Guest

Posted: Thu Nov 09, 2006 9:24 pm Post subject: Cabin top attach - CS 4-4's or AN426-AD4's

Its my understanding that the problem is not visual  crushing of the glass but "fractures" in the matrix at the micro level. Same  problem with Van's single hardpoint for the shoulder harnesses and a single #5  countersunk screw to hold the harness. over time the pulling on the belt  will create micro fractures that will pull through quite easily in a  crash. 

 [quote]   ---

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