Rotorcraft mimics maple seed design

Aerospace engineering graduate students at the University of Maryland’s Clark School of Engineering have mimicked the design of the maple seed, or samara fruit, to create the world’s smallest controllable single-winged rotorcraft.

In the 1950s, researchers first tried to create an unmanned aerial vehicle that could mimic a maple seed’s spiralling fall. Ever since, their attempts have been foiled by instability, resulting in a lack of control over the tiny vehicles, which were easily knocked off course by wind. As recently as June 2009, this was considered as an open challenge for engineers.

The Clark School students have solved the steering problem and provided a solution that allows the device to take off from the ground and hover, as well as perform controlled flight after its initial fall to the ground when deployed from an aircraft. The device can also hover during its initial descent, or after being launched by hand.