This flying Bat prints with 0.2mm layerheight and 100% Infill.

The 100% infill is needed to make sure the center of gravity is in the right spot.

After the print you have to fold the wings like in the pictures. You can use a lighter to make the bending. Since this is a single whing design, you have to play with the foldings until the bat is flying stable. The outer Wingtip (blue foldline) has to be bent down a little bit to increase its angle of attack.

Don't throw it, instead let it glide out of your hands then it flys best.

If you like this model you may have a look at my other flying toys too
Micro Sailplane	Geared Propeller Launcher	Cross Bow