EXPIRE, the quickly foldable large quadcopter

[EN]

Updates:
[21/01/2024] 19mm motor support (need 2 long m3 srews).
[29/12/2020] Canopy and clips added (+-30g).

This is Expire, any similarity to a big brand commercial quad would be only coincidental, it is a simple modular quadcopter which can be quickly folded for optimum compactness in transport despite its size.
With 15 ”folding propellers: 440X240X230mm

The arms are held in position for flight by pins that are quickly insert and lock without tools.

The lower and upper plates are strictly symmetrical except for the size of the pre-holes respectively for the M3 inserts or the M3 screw heads. Even without exception if you are using M3 inserts with a diameter of 6mm (M3 heads are generally 5.5mm).
The integration of the screw heads in the frame allows easy use of the top plate for mounting electronics.

12mm aluminum tube arms were chosen, heavier than carbon certainly, but more solid and more accessible. In addition, the shape ensures a perfect fit between the p