Well, to start things off this post is a bit late. As I mentioned in a previous post, this time of year is very busy for my wife and I. I did manage to get out and pick up some supplies. A trip to Home Depot yielded some Gorilla Glue for the frame and some Titebond III to make the laminate that I will use as a plywood substitute and thinned a little it should work well as a sealer to replace varnish on the 1:4.
After looking over the wood at HD and finding all of their lumber riddled with knots, I decided to head over to Southern Lumber. Since I was planning to use clear vertical grain Douglas fir for the aircraft build I decided to use DF for the 1:4 as well. I have heard that DF is more difficult to work with so it makes sense to experiment a little with it before buying a bunch for the full size aircraft.
After I got home I set up a little workspace at my desk and set up an area for testing the ply material layup. I cleared the space and prepared the surface, laying out some 6 mil sheeting and taping it down to the desk top. After the work surface was ready I started the first piece of the paper laminate by covering a 1′ x 2′ sheet with Titebond III. Once the glue was brushed over the entire sheet I let it set until slightly tacky to the touch, once it was ready I added the second sheet and smoothed it out, making sure any air bubbles had been worked out, you can see these steps in the pictures below.
Later in the day I checked out how things looked. I was not pleased with the results.
After all was said and done, the end product was wrinkled, warped and in general undesirable. Thinking back to my days doing some bookbinding I remembered that glued paper products need considerable compression and dry time. I am going to experiment a little more with the laminating process. I still have hope for the it working well as a stand-in for plywood.
Next week I should have time to start the milling. I know what size pieces are included in the spruce kit so I can start with those. Once I have the lumber milled I can get started with the bulkheads. Hopefully I will have figured out the ply stock issue by then.
Till next time, blue skies and tailwinds,