![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/4/49/CH-46_Sea_Knight_Helicopter.jpg/640px-CH-46_Sea_Knight_Helicopter.jpg&w=640&q=50)
Tandem-rotor aircraft
Helicopter with two horizontal rotor assemblies / From Wikipedia, the free encyclopedia
A tandem-rotor aircraft is an aircraft with two large helicopter rotor assemblies mounted one in front of the other in the horizontal plane.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/4/49/CH-46_Sea_Knight_Helicopter.jpg/640px-CH-46_Sea_Knight_Helicopter.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/6/65/Tandem_rotor.gif/320px-Tandem_rotor.gif)
Currently this configuration is mainly used for large cargo helicopters.[1]