With the drag brace supports in place it’s time to frame in the opening at the top of the wing. I cut a piece of RS-17 to length and notched the side of it where the gussets are located on rib #2 then glued to the side of the rib.
Next I located the rear of the opening and cut the plywood connecting the root and #1 rib. Then removed the front portion of the plywood.
Another RS-17 was cut to fit between the root and #1 rib. At the rear of the opening the RS-17 is notched to make room for a horizontal RS-17.
After checking the fit it was glued into place.
Once the glue was dry rib #1 was cut at the rear of the opening where the notch was made in the RS-17.
Another RS-17 is cut and glued into the notch forming the rear of the opening.
A 1/16″ ply gusset is added to the bottom at ribs #1 and #2 to strengthen the rear opening.
Lastly a piece of RS-3 is glued to the front spar to provide a surface for attaching the lexan cover.
Now it’s time to install the tank floor.