Harvard Robobee X-Wing Achieves First Light-Powered Untethered Flight
Harvard's latest Robobee X-Wing flies using only power collected from light, eliminating the need for batteries or tethered wires. Weighing just a fraction of a gram, this tiny robot matches the thrust efficiency of real insects.
Harvard's Robobee X-Wing achieves a major robotics milestone by flying using only the power it collects from light hitting its solar cells. Unlike previous versions that rely on a wire for electricity, this tiny robot requires no battery and no laser to stay aloft. The researchers accomplish this by making the power conversion and wing mechanical systems incredibly lightweight.
Self-powered flight proves extremely difficult at this small scale, defying the assumption that tiny robots fly as easily as insects. The entire Robobee X-Wing weighs about a quarter of a gram, which is roughly half the weight of a standard paper clip. Despite its minuscule size, the vehicle consumes only 110 to 120 milliwatts of power and matches the thrust efficiency of similarly sized real bees.
The team at Harvard's Microrobotics Laboratory considers this four-wing architecture the lightest insect-scale aerial vehicle to achieve sustained untethered flight. While the robot currently requires light brighter than natural sunlight to operate, it represents a significant step toward real-world conditions. However, the current design still lacks sophisticated flight control electronics and power storage capabilities needed for independent steering.