Researchers have developed a bio-inspired robot that replicates the peculiar flight mechanism of hummingbirds, known as "clap and fling." This aerodynamic phenomenon, which involves the collision and separation of wings at the top of the upstroke, generates additional lift crucial for the hovering and agility of these birds. The new robot, designed to study this mechanism in detail, uses a synchronized actuation strategy to precisely imitate the hummingbird's wing movement, opening new avenues for the design of micro-aerial vehicles (MAVs).

The "clap and fling" is a complex phenomenon that has been the subject of study for decades. It is believed to contribute significantly to the flight efficiency of insects and small birds, allowing them to maneuver in confined spaces and maintain hovering flight with a high degree of control. However, its recreation and analysis on robotic platforms have been challenging due to the need for precise control and exact synchronization of wing movements. This new robotic approach offers an experimental platform to unravel the complexities of this aerodynamic mechanism.

The robot employs a control system that synchronizes the movement of the two wings to achieve the "clap" and "fling" at the appropriate moment in the flapping cycle. Experiments with the robot have allowed researchers to quantify the contribution of this mechanism to total lift, confirming its importance. The results obtained with this robotic model provide valuable data for validating theoretical models and computational simulations of hummingbird flight and other small flyers, and could inspire the development of more efficient and versatile drones for applications such as surveillance or exploration in complex environments.