REFLECTOR: building With West Systems

[Douglas Holub]

That was always my biggest concern with West Systems.  I think it starts getting soft around 150 F and EZ Poxy is about 160F.  I used West Systems for non-structural applications because it was easier to mix and not as toxic.
  ----- Original Message ----- 
  From: Jeff Barnes 
  To: Velocity Reflector 
  Sent: Wednesday, September 04, 2013 10:17 AM
  Subject: Re: REFLECTOR: building With West Systems


        Hello, 

        Careful, West System has significantly lower TG than EZ-Poxy, Aeropoxy, and Polypoxy. Ask for the datasheet of the various on Canard Aviators.

        Regards, 

        Jeff Barnes 




------------------------------------------------------------------------------
  From: Paul Folkes <ausvelocity at gmail.com>; 
  To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>; 
  Subject: Re: REFLECTOR: building With West Systems 
  Sent: Wed, Sep 4, 2013 9:32:41 AM 


        Patrick,


        because I cannot get the Velocipoxies and Aeropoxies in Aust but can readily get West Systems, I asked the question of Scott S at the factory - his emailed advice to me was that I could use WS for the entire build but that the factory didn't generally recommend that because WS was more expensive than the others.


        For what it's worth.


        Cheers,


        Paul Folkes

        XLRG

        VH-VVX

        building but a loooong way to go.




        On 4 September 2013 09:24, Patrick Sieders <pjsieders at comcast.net> wrote:

          Hello all,



          I have flipped my plane upside down to start working on the fuselage-fuel strake transitions. Reading up on it, it requires microballoon to fill. Now I have been using West systems as I understood from others that it can be used as a replacement for ‘anything’. One statement I got was “ You can build your whole airplane with West Systems, but it’s expensive”. I have been trying to answer this by looking into the Wiki and the reflector, but no real answer there.



          Looking at the manual, introduction :

          “EZ-Poxy - is used in all major lay-ups on foam and all lay-ups of glass to glass. EZ-Poxy

          hardener is mixed with DER 324 resin at a 44:100 ratio. For lay-ups on foam, a

          slurry of EZ-Poxy and micro balloons is used. Throughout the construction manual

          this mixture is referred to as Micro-Slurry. It is also used with milled fiber for

          structural fillets and structural bonding such as hinge pockets for the speed brake,

          doors, etc. This epoxy was known as Epolite (2180/2183/2184) and SafetyPoxy

          in past manuals.



          VelociPoxy - these systems are used primarily in the finishing and filling , never for glass

          lay-ups. VelociPoxy hardener is mixed with DER 324 resin at a 1:2 ratio. For

          finish work, VelociPoxy is mixed with micro-balloon to create a smooth easy to

          sand filler that is flexible. This epoxy was known as AlphaPoxy in the past manuals.

          The resin for both EZ-Poxy and VelociPoxy are the same, only the hardener is different.

          The Resin is clear in color and is known as DER 324.



          You may see references in books and catalogs and videos to Safe-T-Poxy, or Hexcel

          Epolite they have been replaced by EZ-Poxy, and Genimid or AlphaPoxy has been replaced

          by VelociPoxy. You may substitute the West System or Resin Research epoxy for

          VelociPoxy if desired.”



          This confuses me. Here it states clearly that West system is a replacement for Velocipoxy, but not for EZ-Poxy ? So which is it ? Before I start mixing the wrong resin/hardner in the wrong place.



          Are there any times that other epoxies are needed ? (if the statement holds true that west system is a replacement for ‘all’?)



          Maybe very fundamental and basic questions, I am just getting ‘cold feet’.



          Thanks for your replies.

          Patrick Sieders

          XLFG-5





          Patrick & Dana Sieders

          Nashville TN 

          Tel. 615-250-2304

          Cell P. 615-918-2698



          Http://www.sieders.com/sieders






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