JEM Watercraft

JEM Watercraft

Customer Service Forum
Direct Links To: Canoe Plans  --  Kayak Plans  --  Other Plans
 
It is currently Wed Oct 18, 2017 11:36 pm

All times are UTC - 5 hours [ DST ]




Post new topic This topic is locked, you cannot edit posts or make further replies.  [ 1 post ] 
Author Message
 Post subject: Step 4: Filleting Seams
PostPosted: Thu Sep 02, 2004 12:42 pm 
Offline
Site Admin
User avatar

Joined: Fri Jun 18, 2004 8:14 pm
Posts: 4855
Location: Greensboro, NC
Note: Our prefered way to fillet and fiberglass seams is to "tack weld" the seams first and then complete the fillet and tape after the welds have completely cured. Many builders have many views on the best way to do things. This is the way we beleive provide the best results.

We used mahagony woodflour which makes some very dark material when mixed with the resin. This was done to more clearly display the material is our pictures.



As stated earlier in the process, ensure you maintain a consistent gap. The glue/material that fills the gaps will disperse and stress loads evenly along the seam and to the fiberglass. You do NOT want a "hard spot" or wood-on-wood contact point especially below the waterline.
Image

Mask off the opposite side of the seam from which you'll be working. Paint masking or duct tape works well.
Image

Mix a small amount of resin. Remember: all wood surfaces, even edges must be coated with resin. Coat the wood where the fiberglass tape will be applied. Mix woodflour into the resin until reaching a peanut-butter-like consistency.
Image

Fill the gap in the seam with just enough material to fill the void. Do not overfill the seam and have excess material flowing out of the seam. Clean up any excess material.
Image

Fill as much of the gap between stitches as you can. Continue this process for all of you seams. The masking tape will contain the filler material.
Image

LET CURE COMPLETELY

Notes:
a. The gap filling glue is strong, but can be brittle if handled roughly.
b. Filleting and taping can be a time consuming task.
c. Trying to wet out cloth with resin that is starting to cure and harden is not a fun task.

For these reason, we recommend you work with small lengths of seams rather than trying to do an entire seams at once.


Cut the lengths of fiberglass tape you'll need.

Remove the stitches from the seam area you'll be working with.
Image

You may wish to do a light sanding of the taping area to smooth it out and remove impurities.

Mix some resin, then woodflour until reaching a peanut-butter-like consistency.
Image

Fill in any gaps not filled before. Also apply additional material to make a smooth and tangeant surface transition. The fiberglass tape will lay on top of this radius/fillet.
Image

Do NOT use excess material for this step. You only need enough material to form a radius. Excess material in your fillet will not make the seam stronger. Clean up any excess material.
Image

Allow the fillet to cure until it reaches a bubble-gum like consistency. About 40 minutes using medium cure rate resin at 70 degrees F. Apply a coat of resin over the fillet and area where the fiberglass tape will lay.
Image

Place the fiberglass tap onto the seam.
Image

Gently work the tape into place while removing any and all air bubbles. Also press out any excess resin out of the tape. You only need just enough resin to wet out the tape.
Image

The tape will become transparent as it fully wets out. If you encounter an area that is not wet out, apply additional resin. But use the resin sparingly. Spread any excess resin on other wood srufaces that have yet to be coated.
Image

Let seam fully cure. Repeat this process for all your seams.

_________________
-Matt. Designer.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic This topic is locked, you cannot edit posts or make further replies.  [ 1 post ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


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

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Template made by DEVPPL/ThatBigForum