2Seas 20

2Seas 20

Facts and figures

2Seas 20
  • Wingspan: 3.74 m
  • Empty weight: 19.2 kg
  • Maximum take-off weight: 28.7 kg
  • Power plant: 2 x 3W 28iCS (two 2-stroke petrol engines)
  • Endurance: 3 hrs
  • Developed into the Spotter Light UAS


2Seas-20 is an unmanned aerial vehicle, developed by the University of Southampton as part of the 2Seas-3i European Interreg project. It is a twin engine, 4m wing span, fixed-wing aircraft which has been designed to perform long-endurance, all-weather patrol missions in coastal and maritime environments. Reliability and safety have been among the strongest design drivers of this project; 2Seas-20 is able to survive the failure of one engine and of any single control surface. A modular approach has been adopted for the payload unit in order to allow the users to rapidly interchange the sensors required to perform different missions.

One of the most innovative aspects of 2Seas-20 is the extensive use of the Selective Laser Sintering (SLS) technology (also known as 3D printing) for many of the components of its airframe. By eliminating tooling and manual labour, the 3D printing technology allows the designer to produce complex and high-performance structures at a relatively low cost and within hours of the completion of the design.