From a Guardian report:
"Two official safety inquiries took place into the military use of drones over southern England after near-collisions with helicopters, the Guardian can reveal.
The investigations are the first of their kind involving unmanned aerial vehicles (UAVs), which are increasingly being flown in British civilian airspace after extensive use in Iraq and Afghanistan.
The inquiries by Airprox, the body that investigates reports of near-collisions, relate to flights on 12 February by a Desert Hawk 3 (DH3) drone owned and used by the army. The drone was being flown in military airspace over Salisbury Plain and operated from the ground.
In each case Airprox concluded that action taken by the operator on the ground prevented collision with the helicopter. "
Comments
LMAO, LOL & CO
On a serious note, they have kevlar underbelly.
So all left would be 3x12 inch kevlar cloth pressure-molded around one of the blades.
Apache blades are said to be able to take at last single 23mm hole per blade - but it might be propaganda+wishful research as well.
The link looks like it is broken...