KR> Trimming the firewall

[Dan Heath]

I just let my cowl overlap the firewall by about a 1/2" and no one ever said
anything about it, in fact, I hardly noticed it.  I have seen production
aircraft done like that.



See N64KR at   http://KRBuilder.org - Then click on
the pics 



2105 KR Gathering - McMinnville, OR.  September 3 - 6 -- See U There.



Peoples Choice at 2013 - KR Gathering in Mt. Vernon, Il - MVN 

Best KR at 2013 - KR Gathering in Mt. Vernon, Il - MVN 

Best Interior at 2013 - KR Gathering in Mt. Vernon, Il - MVN 

Best Paint at 2013 - KR Gathering in Mt. Vernon, Il - MVN 

Best Firwwall Forward at 2013 - KR Gathering in Mt. Vernon, Il - MVN 



Best Interior and Panel at 2008 - KR Gathering in Mt. Vernon, Il - MVN





Daniel R. Heath - Lexington, SC

KR> Trimming the firewall

[Randy Moore Newbern Tn. N318RM]

I am going to fill a d feather it back


-Original Message-
From: Paul Visk via KRnet 
To: KR EMAIL BOARD 
Sent: Fri, Nov 28, 2014 1:45 pm
Subject: KR> Trimming the firewall


I'm trimming my 1/4" plywood for my firewall now. 
I'm curious if anybody has setback the edge of the plywood a little to except 
the cowling edge or just fill the fuselage up to meet the cowling edge. 

Paul Visk
Belleville Il
618 406 4705
___
Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
please see other KRnet info at http://www.krnet.org/info.html
see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change 
options

KR> Polystyrene bonding

[cruzj12 at frontiernet.net]

Liquid?nails in a caulk gun is used to bond this foam board to basement 
foundations on cinder block walls.Joe Cruz
cruzj12 at frontiernet.net
KR1.5 N3151K
KR2S builder 

 On Friday, November 28, 2014 11:37 AM, Oscar Zuniga via KRnet  wrote:


 Adam wrote-

>? ? Thank you for the detailed response. this really helps make my final 
>judgment.
> Just one question. Do you need 100% coverage?( excluding area near sanding )?
> or are you suggesting ex. 75% coverage?

I can't imagine why you would need 100% coverage in order to bond the pieces 
soundly, but you might want to get a couple of scrap pieces and do some testing 
for your own satisfaction.? Try just laying down some 'S' passes on two pieces 
of board to give minimal bonding (and weight), then maybe a little bit more to 
give perhaps 50% coverage on a second pair of scraps, then maybe cover most of 
the joining faces of a third set except for the edges.? Let cure and then stick 
a putty knife in between the pieces and see how readily they pop apart.? In any 
case, the foam board gets sanded to shape and glassed over, so it's not like 
it's going to have large shear or peeling forces trying to pop the pieces apart.

Oscar Zuniga
Medford, OR

 ??? ??? ??? ? ??? ??? ? 
___
Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
please see other KRnet info at http://www.krnet.org/info.html
see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change 
options

KR> Abrasive Tape

[Joe. E. Wallace]

Thanks Mark for the words on the tape...  I know the shipping is a bit much, 
but I just want to move this from my inventory...  jw

Joe. E. Wallace
jwallacep51 at gmail.com

KR> Trimming the firewall

[Flesner]

>   I'm curious if anybody has setback the edge 
> of the plywood a little to except the cowling 
> edge or just fill the fuselage up to meet the 
> cowling edge.?  Paul Visk Belleville



Finish the firewall to the fuselage edge.  The 
cowl will be inset the thickness of the cowl so 
the outside edge of the cowl is in line with the 
fuselage side, basically a butt joint.  At least 
that's how I did 
mine. 
https://dl.dropboxusercontent.com/u/32133949/IMG_8737.jpg 
Best photo I could find at the moment.

Larry Flesner

KR> Trimming the firewall

[Paul Visk]

I'm trimming my 1/4" plywood for my firewall now.?
I'm curious if anybody has setback the edge of the plywood a little to except 
the cowling edge or just fill the fuselage up to meet the cowling edge.?

Paul Visk
Belleville Il
618 406 4705

KR> Polystyrene bonding

[Adam Tippin]

Oscar

   Thank you for the detailed response. this really helps make my final 
judgment.
Just one question. Do you need 100% coverage?( excluding area near sanding )? 
or are you suggesting ex. 75% coverage?

> On Nov 11, 2014, at 9:16 PM, Oscar Zuniga via KRnet  
> wrote:
> 
> Adam; I used pink Owens-Corning 'Foamular' extruded polystyrene board (but 
> Dow Styrofoam is the same thing).  I have used 2-part "five minute" epoxy to 
> bond the board when I want a really good bond.  Spread it with a squeegee but 
> don't get it anywhere near an edge or anyplace that you'll be sanding, 
> because the hard epoxy sands much differently than the softer poly board and 
> you'll end up with a ridge.
> 
> I've used hot glue when I was just mocking up something and wasn't interested 
> in a permanent bond.  Pieces joined in this way come unglued under load and 
> they also fall apart over time if you don't glass over them, so this is only 
> a temporary way to bond polystyrene in my opinion.
> 
> I've also used a peanut butter mix of epoxy and microballoons, spread out 
> moderately thin but not too thin, to permanently bond layers of polystyrene 
> board.  The same caution applies as it does to 5-minute epoxy: don't get it 
> near the edges where you will be sanding it, even though micro sands a little 
> easier than solid epoxy.  You will get ridges at the glue joints if you let 
> the micro mix get out to where you are sanding.
> 
> I've also used plain Aeropoxy to bond layers of board, but it can get pretty 
> heavy if you use a lot of it.
> 
> Oscar Zuniga
> Medford, OR
> 
> 
> ___
> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search.
> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org
> please see other KRnet info at http://www.krnet.org/info.html
> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change 
> options

KR> Last saturday flight with my son

[Paul Visk]

Thats what its all about. ?I can't what to take my grand kids up.?
Great video?Eduardo.

Paul Visk
Belleville Il
618 496 4705

 Original message 
From: Eduardo Barros  
List-Post: krnet@list.krnet.org
Date: 11/28/2014  6:42 AM  (GMT-06:00) 
To: Paul Visk ,KRnet  
Subject: Last saturday flight with my son 

http://youtu.be/kXrSd1wpU4g
Saludos

Eduardo Barros
San Pedro, Bs. As., Argentina
?
Mail: eduardo at kr2-egb.com.ar 
Visite el proyecto de construcci?n del avi?n experimental ?Kr2 EGB?: 
www.kr2-egb.com.ar

KR> Last saturday flight with my son

[Eduardo Barros]

http://youtu.be/kXrSd1wpU4g
Saludos

Eduardo Barros
San Pedro, Bs. As., Argentina

Mail: eduardo at kr2-egb.com.ar 
Visite el proyecto de construcci?n del avi?n experimental ?Kr2 EGB?: 
www.kr2-egb.com.ar

KR> Polystyrene bonding

[Oscar Zuniga]

Adam wrote-

>Thank you for the detailed response. this really helps make my final 
> judgment.
> Just one question. Do you need 100% coverage?( excluding area near sanding )?
> or are you suggesting ex. 75% coverage?

I can't imagine why you would need 100% coverage in order to bond the pieces 
soundly, but you might want to get a couple of scrap pieces and do some testing 
for your own satisfaction.  Try just laying down some 'S' passes on two pieces 
of board to give minimal bonding (and weight), then maybe a little bit more to 
give perhaps 50% coverage on a second pair of scraps, then maybe cover most of 
the joining faces of a third set except for the edges.  Let cure and then stick 
a putty knife in between the pieces and see how readily they pop apart.  In any 
case, the foam board gets sanded to shape and glassed over, so it's not like 
it's going to have large shear or peeling forces trying to pop the pieces apart.

Oscar Zuniga
Medford, OR