This is the RAF Se5a as designed by Salvador Ortega.
Is a free download from
Modelismo en Papel - Salvador Ortega Cabrera
The kit was originally designed at 1/72 scale, but I enlarged it to my preferred 1/33 scale.
Here we can see the source file together with my references.
(Please note that I added some digital textures and colors)
The first step is to start with part of the fuselage:
After a few careful cuts it looks like this:
Then comes the edge coloring. I made it using a fine tip felt marker:
As you can see I laminated the printed page several times in order to get a more proportional thickness of the wood elements.
Now you can see the work of the basic fuselage frame was completed:
A front image shows that the result is fairly good.
So far, so good.
Hope the rest of the plane is as easy as this frame.
See you soon!