British troops in Afghanistan are now using 10-centimeter-long 16-gram spy helicopters to survey Taliban firing spots.
The UK Defense Ministry plans to buy 160 of the drones under a contract worth more than $31 million.
The remote-controlled PD-100 PRS aircraft, dubbed the Black Hornet, is produced by Norwegian designer Prox Dynamics. The drone is a traditional single-rotor helicopter, scaled down to the size of a toy. British troops use the drones for reconnaissance missions, sending them ahead to inspect enemy positions.
Each drone is equipped with a tiny tillable camera, a GPS coordinate receiver and an onboard autopilot system complete with gyros, accelerometers and pressure sensors, which keeps it stable in flight against winds as strong as 10 knots, according to reviews. The tiny aircraft is agile enough to fly inside compounds, and is quiet enough not to attract unwanted attention. If detected, the drones are cheap enough to be considered expendable.