Flapping Paper Plane

This flapping paper plane folding method I am learning from a college student over ten years ago.

It happen at a Physics class, a paper plane competition. Tens of paper plane throw out altogether, one of them not fly too far but draw all students and my attention, because the paper plane flapping like a bird in the air!

I catch that student and teach me how to fold it. He say the folding method learn from the internet, but the page not mention it will flap. I have lost that web page but I guess this folding method designed before internet born.

Any A4 paper should work, recycling paper preferred. In my experience, 80gsm is a bit too light, 100gsm or above is better.

This is the most difficult step, it can help by drawing a diagonal line with ruler before folding.

The folding angle for the corner is a little bit arbitrary, but you can see a straight line from the upper and lower triangle after the fold.

The fold out portion is arbitrary, just the size that your fingers that can hold the paper plane body.

keep the wings in v-shape

Use 2 fingers hold the paper plane body thickest part, check the wings in v-shape and at the same angle.