# Propeller-Hiding Drones The Nano Tornado Doesn't Have Exposed Propellers By Rahul Kalvapalle | Published 2015-05-26 | Tech Source: Trend Hunter, https://www.trendhunter.com/trends/nano-tornado References: [gizmag](http://www.gizmag.com/nano-tornado-ducted-fan-drone/37683/) & [indiegogo](https://www.indiegogo.com/projects/nano-tornado-camera-drone-own-the-sky) The Nano Tornado is a quadcopter that uses four ducted fans instead of the usual exposed propellers. Exposed propellers don't just have the potential to hurt people, they can also easily be damaged in crashes. This is why Pasadena, California-based Polyhelo decided to go ahead with this drone, a 3D-printed flying prototype of which already exists. Because the Nano Tornado doesn't have exposed propellers, it can be used in applications considered too risky for regular drones, such as flying in narrow spaces or near branches or obstacles. Moreover, it can easily be carried around in a bag and can safely be landed on users' outstretched arms. The market for drones is expanding at a phenomenal rate, but this quadcopter still manages to stand out because of its hidden-propeller design. ## Trend Insights (Trend Hunter) - Score: 6.1/10 - Popularity: 85% | Activity: 89% | Freshness: 8% - Audience gender: 50% men, 50% women - Primary generations: Millennial, Gen X - Top markets: North America, Europe ## Categories [Trend Hunter](https://www.trendhunter.com/trends) > [Tech](https://www.trendhunter.com/tech) > [Robots](https://www.trendhunter.com/robots) ## Key Themes ### Why This Trend Is Growing - **Hidden-propeller Drones:** The use of ducted fans instead of exposed propellers in drones offers increased safety and opens up new applications. - **Risk-free Drone Applications:** The elimination of exposed propellers in drones allows for safe usage in narrow spaces and near obstacles. - **Portable and Arm-landing Drones:** Drones with hidden propellers can be easily carried in a bag and safely landed on users' outstretched arms. ### Industries Being Reshaped - **Drone Manufacturing:** Manufacturers in the drone industry can explore the use of hidden propellers for safer and more versatile drone designs. - **Safety Equipment:** Companies in the safety equipment industry can develop and market specialized accessories and features for hidden-propeller drones. - **Aerial Photography and Videography:** Professionals in the aerial photography and videography industry can benefit from safer drone operations and capture unique angles using hidden-propeller drones. ## Related on Trend Hunter - [Bladeless Rescue Drones](https://www.trendhunter.com/trends/vita-bladeless.md) - [Ultrasonic Balloon-Borne Drones](https://www.trendhunter.com/trends/blimp-drone.md) - [Triple-Propeller Photography Drones](https://www.trendhunter.com/trends/dji-hitop.md) - [Hazardous Weather-Ready Drones](https://www.trendhunter.com/trends/tf-g1.md) - [Toroidal Vehicle Propellors](https://www.trendhunter.com/trends/toroidal-propellor.md) - [Carbon-Caged Mapping Drones](https://www.trendhunter.com/trends/mapping-drone.md) - [Modular Self-Flying Drones](https://www.trendhunter.com/trends/hoverair-x1-pro.md) - [Heavy-Duty Hybrid Drones](https://www.trendhunter.com/trends/hybrid-drones.md) - [Micro-Small Drone Propulsion Systems](https://www.trendhunter.com/trends/microsmall-drone.md)