So while drones are part of the problem the bigger issue is, again, assholes who need to learn that their decisions have extreme and uncomfortable consequences. Time to set up the 'Wildfire Emergency Act" or something that lets police and firefighters hand out multi-thousand dollar tickets to people who get in the way.
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How do they endanger helicopters? The rotor wash alone will blow them away.
Because the multi-meter wide propeller assembly faces in whatever direction the helicopter is going sucking in air (and drones) as it moves. A drone, especially one carrying larger camera cargo, could do fatal damage to the blades or even strike the cockpit canopy.
What kind of drone could damage rotor blades?
Aircraft maintenance here, even a tiny drone can cause a lot of damage and potentially cause the aircraft to be down for maintenance for a long time. The rotor blades are tough and would probably be ok to get back to the ground with a tiny 250g drone strike but would require inspections and could possibly damage the rotor beyond continued service and require replacement, which may not be on hand. Anything larger and it could be catastrophic
One of the most popular consumer drones, the DJI Phantom, weighs around 1.3kg from what I could see on their website. That would do some serious damage to any aircraft.
It doesn't matter, you do not take the risk with things that are literally working against gravity. There's a reason why aviation laws and rules are so strict
Understanding the risks of important.
It is yes but I'm sure they will still take a zero risk approach rather then have things that defy gravity just fall and learn after the fact. A bit better to be .ore safe then sorry when it comes to aviation (Boeing doesn't count)