Donut Cinewhoop Duct

This is a replacement duct for the banggood special Donut cinewhoop quadcopter.

https://www.banggood.com/Donut-3-Inch-140mm-H-type-Frame-Kit-3D-Printed-Carbon-Fiber-for-RC-Drone-FPV-Racing-75_5g-p-1465407.html

I have put effort into making the ducts printable with 2 walls with no infill or gaps in between. This is the best compromise I could make between strength and lightness. Total print weight is about 40 grams.

Standard 3″ props will turn within these ducts without issues unless your 3d printer is setup wrong and printing circles as ovals.