The MAVLab TU Delft team brings together in the delftAcopter all its knowledge to help poor Outback Joe once again. To make the challenge even harder we decided to go for a full electrically powered rescue UAV. As a research institute we are always pushing boundaries of what is currently possible. Our first preliminary energy calculations showed that a full-electric mission would be just possible, realizing we would need the state of the art battery technology, extremely efficient VTOL UAV and unique autonomous control implementations. this resulted in the delftAcopter. A marriage of a biplane wing and a helicopter propeller. The innovation lies in particular in the use of a tailless double-decker combined with one helicopter propeller which is used in both hover and in forward flight of in the most optimal regime.

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Thanks to the autopilot the deftAcopter is capable of full autonomous flight, including: autonomous take-off, autonomous transition to forward flight and back, and autonomous landing. The 10DOF IMU, GPS and pitot-tube provide all necessary information for autonomous flight. The IMU is used for attitude estimation and barometric pressure gives AMSL altitudes. The GPS together with the IMU are used for position estimation for autonomous navigation and geo-fence crossing detection. The airspeed sensor provides airspeed data to the autopilot for optimal flight performance and to maintain the UAV within its flight envelope.

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Property description Value
Cruise speed 50 knots at 150 watt
Most efficient speed 35 knots at 120 watt
Maximum speed 58 knots
Weight 4kg
MTOW 4,5kg
Wing area 0,496 m2
Wing loading 8kg/m2
Span 1,54m
Length 0,6 m
Height 0,4m
Power usage in hover 450 watt
Main battery energy 10000mAh ~ 225 Wh
FTS battery energy 250mAh ~ 2Wh
RPM in forward flight 450 rpm
RPM in hovering flight 1550 rpm