[NSRCA-discussion] Composite Firewalls

[Ed Alt]

I do. 


From: Budd Engineering 
Sent: Wednesday, April 14, 2010 1:18 AM
To: General pattern discussion 
Subject: Re: [NSRCA-discussion] Composite Firewalls


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! 


            -----Inline Attachment Follows-----


            _______________________________________________
            NSRCA-discussion mailing list
            NSRCA-discussion at lists.nsrca.org
            http://lists.nsrca.org/mailman/listinfo/nsrca-discussion 




----------------------------------------------------------------------------


    _______________________________________________
    NSRCA-discussion mailing list
    NSRCA-discussion at lists.nsrca.org
    http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
  _______________________________________________
  NSRCA-discussion mailing list
  NSRCA-discussion at lists.nsrca.org
  http://lists.nsrca.org/mailman/listinfo/nsrca-discussion


--------------------------------------------------------------------------------


_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20100414/4a6b7a36/attachment.html>