The BAE Systems Mantis Unmanned Autonomous System Advanced Concept Technology Demonstrator is a British demonstrator programme for Unmanned Combat Air Vehicle (UCAV) technology. The Mantis is a twin-engine, turboprop-powered UCAV with a wingspan of approximately 22 m, broadly comparable to the MQ-9 Reaper. Other partners involved in Phase 1 of the Mantis programme include the UK Ministry of Defence, Rolls-Royce, QinetiQ, GE Aviation, L-3 Wescam, Meggitt and Lola.
Development of the Mantis started in late 2007, a mockup being revealed at the 2008 Farnborough International Air Show. The Phase 1 Mantis vehicle is powered by two Rolls-Royce Model 250 turboprop engines, although this is likely to change in later variants. The Mantis is intended to have at least 24-hour operational endurance and is an autonomous vehicle, able to pilot itself and to plot its own course, communicating with personnel on the ground regarding its observations.
Phase 1 is intended to demonstrate BAE Systems' rapid prototyping capabilities and will focus on the evaluation of autonomous control systems. Later phases may evaluate civilian applications, armed variants and sensor packages.