William Cartwright Drennan

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About

William Cartwright Drennan is a pioneering researcher in the emerging field of biohybrid robotics, where he integrates biological muscle tissues with soft synthetic scaffolds to create living, swimming machines. His major contributions center on the forward-engineering of muscle-driven soft robotic swimmers, demonstrating how biological actuators can be harnessed to study tissue mechanics and locomotion at small scales. His most-cited work, a 2025 study on a forward-engineered, muscle-driven soft robotic swimmer (7 citations), presents a flagellate-inspired design that generates thrust through a waving tail, addressing fundamental challenges in microscale propulsion. A related 2024 paper (2 citations) quantifies the performance of these biohybrid swimmers, noting they achieve speeds of just 0.014 body lengths per minute at low Reynolds numbers—highlighting the immense difficulty of mimicking natural swimming at tiny scales. Drennan’s work is notable for its rigorous, model-driven approach, using computational simulations to guide the fabrication of muscle-powered robots. By bridging biology and engineering, he is advancing our understanding of emergent tissue properties and paving the way for future applications in medical microrobots and soft robotics. His research represents a bold step toward truly lifelike, autonomous machines.