Flying butterflies - Print-in-place

A flying butterfly toy that flies only using a rubber band. Wind it up and let it loose or place it inside a birthday card or something to freak out your loved ones.

Four different styles, three of which have patterns on the wings. The patterns adds a little bit of mass and might reduce how well they will fly so I also uploaded them without the patterns.

Printing instructions:

0.15mm layer height 

(Recommend a 0.2mm initial layer height as the wings are only one layer, also make sure to have a well leveled bed)

10-20% Infill

No supports or rafts.

How to make it fly:

Connect the two hooks with a rubber band and spin it about 40-50 times.

Adding a drop of oil to the top hook makes it spin better.

You can also heat up the wings slightly with a lighter or heat gun and bend them opposite directions to improve flight.