26 J-3 Cub Building
the Left Wing
Once the wing tip spline had dried overnight, I
started framing up the left wing panel yesterday morning. The lay up is
shown below with the wing tip spline just laying at the tip on the plan.
I actually removed the left wing frame from the
plan at this point to glue on the wing tip spline. The picture below shows
the wing tip spline glued in place. I also took time out to lay up the right
wing tip spline so could be drying the rest of the day and overnight.
I spent the rest of the day planking the top of
the leading edge, integrating the wing tip spline into the wing structure,
and shaping the trailing edge. A view down on the finished wing is shown
below.
Here is another shot of the left wing from a
different view. I had to be a little creative out at the tip to get the
1/32" leading edge planking to conform to the tip compound contour. I became
concerned about the unsupported tip spline in the area between the front and
rear spars and added a "V" support with 3/32" square as shown below.
As you can see, I spent a fair amount of time
integrating the small 1/8" square wing tip spline into the structure out at
the wing tip and adding thin balsa strips to get the spline to blend in
properly. The picture below is an attempt at showing the detailing of the
integrated wing tip.
This afternoon I may start the lay up of the
right wing panel or I may take a break as I have been working pretty steady
on this project......................Tandy