This airplane consists of a fuselage with a square cross-section with wooden stringers and a turtle-deck to give it a bit of aerodynamic shape, and is fairly straightforward to draw.
I then drew the fuselage frame. This was originally in steel tubing, but I will use spruce for the model. The spruce will be rounded at the fuselage area, as it is possible to see it through the open cockpit.
The original aircraft made use of bracing wires to strengthen the fuselage. I will do the same. More on this later.