Build your own paper helicopter that doesn’t need an engine to fly. Initially, the helicopter falls towards the floor. But suddenly it starts to rotate around its own axis and spirals slowly towards ...

Linnea Edmeier, aviation communications officer at the California Department of Forestry and Fire Protection (Cal Fire), said ...

How does Heather's helicopter fly? As the helicopter drops through the air, the air pushes against and around the paper propeller blades. That makes the helicopter spin. Placing a paper clip on the ...