protector for the servo horns sticking out of the underside of the wing.
since the c-36 has no landing gear, the servo horns are exposed during landings. hence a protection for them makes sense...

Ultimaker

Ultimaker Original

0.1

Use 2-4 top and bottom layers for a nice finish
Since this is a mostly spherical part, the smaller you chose your layer height, the nicer the build will be.
It is supposed to be printed with 1 wall thickness (thickness of your extruder, typically 0.4mm) and no infill