RC Wingspan Folding Propeller 9x8

Working, flew at least 20 flights without problems
solvent treatment field
print two blades side by side (the second is mirrored), the position is shown in the second photo
Screw 3mm
I was surprised, Tests showed the quality and efficiency of APS propellers, I used a 800kv 16volt motor.
When designing, calculations were used
https://youtu.be/Iwyv6IO6eHA
https://youtu.be/vJs2Yb734cI