[NSRCA-discussion] Composite Firewalls

[Bob Kane]

I picked mine up at the Toledo Show from CST, here is a link to their web page for end-grain balsa.

http://cstsales.web01.yourhost.com/shop-bin/sc/productsearch.cgi?storeid=*1a43ce414170ce6a13a769ef894bfc



Bob Kane

getterflash at yahoo.com

--- On Wed, 4/14/10, Budd Engineering <jerry at buddengineering.com> wrote:

From: Budd Engineering <jerry at buddengineering.com>
Subject: Re: [NSRCA-discussion] Composite Firewalls
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Date: Wednesday, April 14, 2010, 1:18 AM

Just curious, where do you guys get the end grain balsa?  I can't imagine you're cutting your own?
Thx, Jerry

Sent from my iPhone
On Apr 13, 2010, at 11:46 PM, "Wayne Galligan" <wcgalligan at att.net> wrote:



I'll  ditto Bob's response on the 1/64 over 1/4" 
endgrain.  More surface area there to glue to fuse. I use a lt. ply ring 
behind the soft mount to hold the blind nuts. Works....gerrrrrrrr... 
ate!
 
Wayne Galligan
Skyblazers R/C Club
Waxahachie 
Texas

  ----- Original Message ----- 
  From: 
  Bob 
  Kane 
  To: General pattern discussion 
  
  Sent: Tuesday, April 13, 2010 9:29 
  AM
  Subject: Re: [NSRCA-discussion] Composite 
  Firewalls
  

  
    
    
      I have had very good results with a firewall made of 
        1/64" plywood laminated on both sides of 1/4" end-grain balsa using 
        polyurethane glue.  Lightly spray water on the balsa, smear the 
        poly glue on the balsa and a light, even coat of glue on the plywood. 
        Press everything together, lay a sheet of wax paper on a flat surface, 
        set the firewall on the paper, cover with another sheet of wax paper, 
        and stack a LOT of books on top. The poly glue will foam and penetrate 
        the plywood, the weight is necessary to keep the plywood from being 
        pushed away from the balsa by the foaming glue.  The resulting 
        structure is very light, very strong, and offers a wide gluing surface 
        inside the fuselage.

My setup uses a Hyde mount, so I glued 3/32" 
        plywood disks approximately 3/4" diameter to hold the blind nuts on the 
        backside of the fire wall.  Nothing is needed on the front, the 
        Hyde mount has a large back surface to spread the load.

I have 
        been flying this in my YS160DZ powered Temptation for 4 seasons now 
        without any problems.

Bob 
        Kane
getterflash at yahoo.com

--- On Tue, 4/13/10, colin 
        chariandy <cchariandy at yahoo.ca> wrote:

        
From: 
          colin chariandy <cchariandy at yahoo.ca>
Subject: 
          [NSRCA-discussion] Composite Firewalls
To: "NSRCA Mailing List" 
          <nsrca-discussion at lists.nsrca.org>
Date: Tuesday, April 13, 
          2010, 9:57 AM


          
          
            
            
              
                Can anyone advise me on the appropriate composite panel 
                size and material for Glow powered firewalls? My Xigris came 
                with 1/8 ply that I'd like to replace. 
                 
                Colin.

          
          
          
          
          Yahoo! 
          Canada Toolbar : Search from anywhere on 
          the web and bookmark your favourite sites. Download it now! 
          
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