The destructive power of drones frequently puts this type of technology in the news but not all of them are designed to deliver missiles. Other uses for UAVs - or unmanned aerial vehicles - range from search and rescue, surveillance, to aerial targeting and aeronautical research.
A number of these craft were on show at this week's Farnborough Airshow in the UK - and this image shows the 90kg turbojet-powered flapless Demon, which was developed by Cranfield University, BAE Systems and the University of Manchester as part of the five-year FLAVIIR project to develop a maintenance-free UAV that incorporated novel technologies.
The Demon successfully completed two flights and became the first representation of a full-size aircraft to achieve controlled roll manoeuvres without moving control surfaces. Instead of flaps, the Demon manoeuvred using fluidic devices that exploited the Coanda effect.
Image: Toby Wolpe/TechRepublic