Hello all,

I try to print RC plane from thingiverse called GASB One.

To achieve low weight, I need to print some parts with single perimeter and without infill, but my print is warped (see attached pic)... It not has nice airfoil. If I use high volume infill, it can help, but it will be to heavy. So my question is, how to fix it?

I use home-made prusa mk2 clone and Slic3r... I tried print with PLA, PLA+ and PETG with same result. I use bed heat and fan on extruder. My print speed is 60mm/s, but I tried also 30mm/s with same result.

Thanks for every advice.
defects.jpg