![The ideal shape for a multirotor 'ducted-fan' that can dramatically improve thrust and flight time. | Capolight Electronics Projects. The ideal shape for a multirotor 'ducted-fan' that can dramatically improve thrust and flight time. | Capolight Electronics Projects.](https://capolight.files.wordpress.com/2015/01/contra-rotating.jpg)
The ideal shape for a multirotor 'ducted-fan' that can dramatically improve thrust and flight time. | Capolight Electronics Projects.
Can we make a quad-copter with a ducted fan and make it perform basic functions? What is good for a quad-copter, ducted or just normal propellers? Why? - Quora
![Modelling, attitude controller design and flight experiments of a novel micro-ducted-fan aircraft - Wei Fan, Changle Xiang, Bin Xu, 2018 Modelling, attitude controller design and flight experiments of a novel micro-ducted-fan aircraft - Wei Fan, Changle Xiang, Bin Xu, 2018](https://journals.sagepub.com/cms/10.1177/1687814018765569/asset/images/large/10.1177_1687814018765569-fig2.jpeg)
Modelling, attitude controller design and flight experiments of a novel micro-ducted-fan aircraft - Wei Fan, Changle Xiang, Bin Xu, 2018
![Lockheed Martin Readies Ducted-Fan ARES Drone for Flight Demo at Yuma Proving Ground - Rotor & Wing International Lockheed Martin Readies Ducted-Fan ARES Drone for Flight Demo at Yuma Proving Ground - Rotor & Wing International](https://www.rotorandwing.com/wp-content/uploads/2018/09/12484104873_8e236d68ef_k-1024x741.jpg)