In a comment to an earlier post, Woody notes that he now has a website on his guided monocopter project. I don't know if I previously credited James Houghton as his partner on the project (but I did now). From that, site you can access his research paper and videos of the monocopter in action.

. The culmination of 3.5 years of research has led to controllable monocopter that can autorotate like a maple seed (Acer diabolicum Blume) and fly like a helicopter (hover and forward flight). The vehicle, invented at the University of Maryland, Aerospace Engineering Autonomous Vehicle Laboratory and Alfred Gessow Rotorcraft Center, is the smallest and most capable to date as it meets most of ...

... the flight of maple seeds.  The hand-sized monocopter can "take off from the ground and hover, as well as perform controlled flight ... maple seed trades off altitude for rotation, the monocopter needs to ascent and hover.  The key insight was separating ... wing while propulsion is provided by a new curved component of the monocopter that maintains rotation. The site includes a video clip ...

Introducing the maple-seed-inspired Ulrich flyer, the world’s first controllable robotic monocopter. The monocopter’s inventors studied the way a maple seed whirls and twirls as it falls to the ground, and designed their flyer based on that biological blueprint. In this video, watch the little aircraft rise through the air with its single blade spinning furiously–accompanied by ...