Structures

Philosophy of our design is to keep a structure lightweight and simple. We believe in one rule: if a part is too weak, try to invent the way to lower the loads instead of part reinforcing. In this way we were able to obtain concepts that are clear from analytical point of view and also resulted with a low weight of a structure. 
First of all it is necessary to mention that wing span around 4 [m] forced us to divide wing into four pieces, to be able to put it into a transportation box.

Wing parts are connected to each other by pivots. It provides safe-proof interface calculation and easy assembling.

Swept wing brought us some challenges, but we found the way out. The most demanding from design and analysis poitn of view, was the connection between fuselage and wing.
Analitical draft below, shows structure interfaces arrangement and forces.

The same strucutre is shown below on 3D model (from front view direction)

Main pivot, going through fuselage, connects left and right wings to each other but isn’t connected in any way to fuselage. It carries bending load generated by aerodynamic forces. Fuselage is attached to wing in four points by bolts. Fuselage frames carry just shear and normal forces coming from interfaces loads in bolts locations. This structure arrangement is a perfect example of our design philosophy, instead of complicated structure of wing and fuselage, we decided to divide roles of each part and decrease their loads. Literally we invented the way to lower loading instead of part reinforcing.