There is a long held belief among engineers and biologists that micro flying robots that fly like airplanes and helicopters consume much more energy than micro robots that fly like flies. A new ...

According to a paywalled paper by the engineers who designed Ingenuity, NASA was also worried about the phenomenon of blade flapping, which is caused by flexing of the rotor blades above and below ...

A normal helicopter needs a tail rotor to stop the craft from spinning in the opposite direction to the rotor blades. ... social-bookmarking links to share New helicopter design has flapping rotors.