Introduction of fixed-wing UAV

The "Black Widow" fixed-wing micro UAV developed by Aero Vironment Company is disc-shaped, with a wingspan 15cm, a weight of 56.7g, a range of 3km, a flight speed of 69km/h and an outdoor battery life of 20min. The company hopes to finally reach1h. Flight tests show that black spiders are hidden and difficult to see or hear. The sound of its motor is much smaller than that of a bird, so people don't know where it is.