[secant0give]

This is unidirectional glass mat. It’s very handy stuff if you want to build great tensional strength into a layup in one direction. It isn’t woven together just joined every inch or so with a thread glued to it. As far as glass goes it’s very easy to wet out and works pretty well for this kind of application.

   

Here’s the pieces I of uni glass allready cut to go span-wise along the top and the bottom of the wing. Note that they are tapered to spread the load and cut so the tapered edges are not directly above one another when layed up.

   

Here are the strips of light glass that will reinforce the trailing edge of the wing and toughen up the ailerons as well.
I find the easiest way to to cut glass cloth is with a straight edge and a sharp exacto blade. Scissors can easily just make a mess.
The light glass cloth is crows foot weave which is quite nice to work with as well.

   

Brown paper strips are cut and tapped with very small pieces of masking tape to the edges of the plastic to hold them in place. These pieces of masking tape will become part of the layup so I keep them as small as possible.

   


Now the glass is layed on top of the paper, epoxy resin is mixed and applied to the glass. It will completely impregnate the brown paper and the paper will give the wing a pin hole free finish and cover the texture of the glass cloth. I should mention that the paper is put down shiny side out. Also a small amount of resin is brushed onto the edges of the plywood inserts in the core and a little resin is lightly brushed on to the area of the core where the layup will be bonded, a little extra needs to go on the core along the trailing edge as well.

   


And here it is all layed up and weighted down. Notice the extra material on the trailing edge and the decent amount of weight needed to press the whole sandwich together

   

It will be interesting to see just how it turns out tomorrow !!!