ETH Zürich built ‘FlexiQuad,’ a quadcopter that replaces its central body and arms with a flexible ring, so search-and-rescue crews and scientists can keep flying after impacts in cramped spaces. Batteries and electronics sit around the rim, allowing flex on contact without the sag that disrupts lift.
The prototype reaches 50 mph and is roughly 1,000 times more flexible than a conventional quadcopter. It can squeeze through a 7-inch slot and pinch around a first-aid pouch to carry it. The team is commercializing it through a startup, with a net-equipped version nearing a field pilot for catching unauthorized drones.
ETH Zürich shows how a raw frame cost below $15 can make collision-tolerant aircraft easier to budget for work in ballast tanks, collapsed buildings and dense forests, while the ring shape extends the concept into drone capture, where avoiding debris matters as much as staying airborne.
Image Credit: Luca Girardi
Key Themes Behind This Trend
- Impact-resilient Robotics
- Flexible frames and distributed components are creating new markets for machines that maintain performance after collisions in confined or hazardous environments.
- Low-cost Rescue Drones
- Affordable airframes under $15 suggest broader access to specialized drones for disaster response, infrastructure inspection, and field science operations.
- Adaptive Drone Capture
- Net-equipped, collision-tolerant designs are reshaping counter-drone systems by enabling safer interception in cluttered or debris-filled spaces.
Where This Applies
- Search-and-rescue
- Crews working in collapsed buildings, forests, and industrial voids could benefit from aerial tools that squeeze through gaps and survive repeated impacts.
- Industrial Inspection
- Confined-space inspection in ballast tanks, pipes, and structural cavities is being expanded by drones designed to flex on contact without losing lift.
- Security Technology
- Unauthorized drone mitigation is evolving with agile capture platforms that can operate near obstacles while reducing damage risks during interception.
