Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Patching the Firewall

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Homebuilt-List
View previous topic :: View next topic  
Author Message
genie(at)swissmail.org
Guest





PostPosted: Mon Feb 28, 2022 12:42 am    Post subject: Patching the Firewall Reply with quote

In the firewall of my Avid Flyer there is a perforation. Does anyone
know how I can patch it up? Thanks.

George Nielsen
The Hague, the Netherlands


- The Matronics Homebuilt-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Homebuilt-List
Back to top
neal.george(at)gmail.com
Guest





PostPosted: Mon Feb 28, 2022 6:05 am    Post subject: Patching the Firewall Reply with quote

George -
How big is the hole?

If it is a small hole, fill it with a bolt, washers and nut. Larger holes may be patched with a bolt and two (2) AN970 large area washers, one on either side of the firewall. If it is too big to cover with washers, consider a patch of stainless or galvanized steel, matched to the thickness of your firewall material, secured with screws & nuts and a fire-rated caulk sealant.

Neal George, A&P/IA
Florida



In the firewall of my Avid Flyer there is a perforation. Does anyone
know how I can patch it up? Thanks.

George Nielsen
The Hague, the Netherlands


- The Matronics Homebuilt-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Homebuilt-List
Back to top
Ceengland



Joined: 11 Oct 2020
Posts: 378
Location: MS

PostPosted: Mon Feb 28, 2022 7:10 am    Post subject: Patching the Firewall Reply with quote

Neal's method is quickest & simplest.  I had a couple of -4 holes intended to mount a fuel pump, & wanted something a bit lighter, so I used stainless sheet I cut from a really cheap cooking pot bought at Walmart (discount retailer here in the US). The gray stuff is intumescent caulk, but 'proseal' or regular silicone would work fine & proseal is what Van's Aircraft recommends for sealing the firewall. Yes, the aluminum rivets will melt, but the entire firewall is riveted with aluminum rivets.
Charlie
On Mon, Feb 28, 2022 at 8:08 AM Neal George <neal.george(at)gmail.com (neal.george(at)gmail.com)> wrote:

Quote:
--> Homebuilt-List message posted by: Neal George <neal.george(at)gmail.com (neal.george(at)gmail.com)>

George -
How big is the hole? 

If it is a small hole, fill it with a bolt, washers and nut.  Larger holes may be patched with a bolt and two (2) AN970 large area washers, one on either side of the firewall.  If it is too big to cover with washers, consider a patch of stainless or galvanized steel, matched to the thickness of your firewall material, secured with screws & nuts and a fire-rated caulk sealant.

Neal George, A&P/IA
Florida

    --> Homebuilt-List message posted by: George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>

    In the firewall of my Avid Flyer there is a perforation. Does anyone
    know how I can patch it up? Thanks.

    George Nielsen
    The Hague, the Netherlands



===========
br> built-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?Homebuilt-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
WIKI -
errer" target="_blank">http://wiki.matronics.com
===========
b Site -
          -Matt Dralle, List Admin.
="noreferrer" target="_blank">https://matronics.com/contribution
===========





- The Matronics Homebuilt-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Homebuilt-List



firewall_patch_(Small).jpg
 Description:
 Filesize:  85.28 KB
 Viewed:  3008 Time(s)

firewall_patch_(Small).jpg



_________________
Charlie
Back to top
View user's profile Send private message
genie(at)swissmail.org
Guest





PostPosted: Tue Mar 01, 2022 6:15 am    Post subject: Patching the Firewall Reply with quote

Neal,

Thank you for your reply. I think that I will need a sheetmetal patch to
cover this hole.

George

On 28-Feb-22 15:04, Neal George wrote:
Quote:


George -
How big is the hole?

If it is a small hole, fill it with a bolt, washers and nut. Larger holes may be patched with a bolt and two (2) AN970 large area washers, one on either side of the firewall. If it is too big to cover with washers, consider a patch of stainless or galvanized steel, matched to the thickness of your firewall material, secured with screws & nuts and a fire-rated caulk sealant.

Neal George, A&P/IA
Florida



In the firewall of my Avid Flyer there is a perforation. Does anyone
know how I can patch it up? Thanks.

George Nielsen
The Hague, the Netherlands


- The Matronics Homebuilt-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Homebuilt-List
Back to top
genie(at)swissmail.org
Guest





PostPosted: Tue Mar 01, 2022 6:20 am    Post subject: Patching the Firewall Reply with quote

Charlie,


Thank you for your reply and the photo which illustrates this. You always provide me with useful information. Thanks for your replies. I am familiar with Walmart. This company used to have a presence in Germany. Is the cooking pot which you purchased at Walmart made out of aluminium or steel? 



George



On 28-Feb-22 16:07, Charlie England wrote:

Quote:
Neal's method is quickest & simplest.  I had a couple of -4 holes intended to mount a fuel pump, & wanted something a bit lighter, so I used stainless sheet I cut from a really cheap cooking pot bought at Walmart (discount retailer here in the US). The gray stuff is intumescent caulk, but 'proseal' or regular silicone would work fine & proseal is what Van's Aircraft recommends for sealing the firewall. Yes, the aluminum rivets will melt, but the entire firewall is riveted with aluminum rivets.


Charlie


On Mon, Feb 28, 2022 at 8:08 AM Neal George <neal.george(at)gmail.com (neal.george(at)gmail.com)> wrote:

Quote:
--> Homebuilt-List message posted by: Neal George <neal.george(at)gmail.com (neal.george(at)gmail.com)>

George -
How big is the hole? 

If it is a small hole, fill it with a bolt, washers and nut.  Larger holes may be patched with a bolt and two (2) AN970 large area washers, one on either side of the firewall.  If it is too big to cover with washers, consider a patch of stainless or galvanized steel, matched to the thickness of your firewall material, secured with screws & nuts and a fire-rated caulk sealant.

Neal George, A&P/IA
Florida

    --> Homebuilt-List message posted by: George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>

    In the firewall of my Avid Flyer there is a perforation. Does anyone
    know how I can patch it up? Thanks.

    George Nielsen
    The Hague, the Netherlands



===========
br> built-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?Homebuilt-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
WIKI -
errer" target="_blank">http://wiki.matronics.com
===========
b Site -
          -Matt Dralle, List Admin.
="noreferrer" target="_blank">https://matronics.com/contribution
===========






- The Matronics Homebuilt-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Homebuilt-List
Back to top
Ceengland



Joined: 11 Oct 2020
Posts: 378
Location: MS

PostPosted: Tue Mar 01, 2022 7:02 am    Post subject: Patching the Firewall Reply with quote

Stainless. In the US, they're often called 'stock pots'. Here's a link to the one I'm pretty sure I bought. At 0.013" thick, it's really thin material; about the same thickness as the stainless firewall material in my RV7 project.I've actually bought a couple of them for various purposes. Scraps can be used to make 'chip chasers'. I had problems with the RV6 aluminum wheel pant brackets cracking, and rather than buying new brackets, I formed 'doublers' using  stainless cut from one of these pots; no further cracking. I made a large heat shield to protect my rotary engine intake from the exhaust manifold (they're only a few inches apart). And the firewall patches, of course.
Just find the cheapest *stainless* cooking pot available, and cut it up with an abrasive wheel in a die grinder. Be careful with the pieces, though. Until you dress the edges, they are extremely sharp. If you've never worked with stainless, be aware that it will be pretty hard on your tools. Not a big deal with abrasive wheels, but drill bits will suffer, and cutting it with a regular saw will likely destroy the saw blade along with the thin stainless.
Good luck!
Charlie
On Tue, Mar 1, 2022 at 8:22 AM George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)> wrote:

Quote:
Charlie,


Thank you for your reply and the photo which illustrates this. You always provide me with useful information. Thanks for your replies. I am familiar with Walmart. This company used to have a presence in Germany. Is the cooking pot which you purchased at Walmart made out of aluminium or steel? 



George



On 28-Feb-22 16:07, Charlie England wrote:

Quote:
Neal's method is quickest & simplest.  I had a couple of -4 holes intended to mount a fuel pump, & wanted something a bit lighter, so I used stainless sheet I cut from a really cheap cooking pot bought at Walmart (discount retailer here in the US). The gray stuff is intumescent caulk, but 'proseal' or regular silicone would work fine & proseal is what Van's Aircraft recommends for sealing the firewall. Yes, the aluminum rivets will melt, but the entire firewall is riveted with aluminum rivets.


Charlie


On Mon, Feb 28, 2022 at 8:08 AM Neal George <neal.george(at)gmail.com (neal.george(at)gmail.com)> wrote:

Quote:
--> Homebuilt-List message posted by: Neal George <neal.george(at)gmail.com (neal.george(at)gmail.com)>

George -
How big is the hole? 

If it is a small hole, fill it with a bolt, washers and nut.  Larger holes may be patched with a bolt and two (2) AN970 large area washers, one on either side of the firewall.  If it is too big to cover with washers, consider a patch of stainless or galvanized steel, matched to the thickness of your firewall material, secured with screws & nuts and a fire-rated caulk sealant.

Neal George, A&P/IA
Florida

    --> Homebuilt-List message posted by: George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>

    In the firewall of my Avid Flyer there is a perforation. Does anyone
    know how I can patch it up? Thanks.

    George Nielsen
    The Hague, the Netherlands



===========
br> built-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?Homebuilt-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
WIKI -
errer" target="_blank">http://wiki.matronics.com
===========
b Site -
          -Matt Dralle, List Admin.
="noreferrer" target="_blank">https://matronics.com/contribution
===========









- The Matronics Homebuilt-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Homebuilt-List

_________________
Charlie
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Homebuilt-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group