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So if you don't want your neighbour flying his drone over your property can you shoot it with ultrasound? What would the legalities of that I wonder?

• tantalor 8y ago
  Same as shooting it with a gun, modulo local ordinance.
  • dalore 8y ago
    Is that really the same? Can you fire off a gun in your backyard at the sky? Isn't that illegal as the bullet comes back down to earth it can kill. Meanwhile ultrasound is just lot's of sound waves and doesn't go far, and can't kill anything. I can fire ultrasound up into the air without a license or it being illegal.
    • walterbell 8y ago
      Use a defensive drone that fires vertically upward into the airspace over your property?
    • rbanffy 8y ago
      > can't kill anything Unlike a large drone fully powered up hitting an unsuspecting person.
    • jtbayly 8y ago
      But doing it intentionally, whether as a triggered booby trap or an aimed shot, and taking down a drone would likely still be illegal if shooting a drone down with a gun is illegal. I can’t remember for sure whether it is illegal to do so over your property, but I think it is.
      • pbhjpbhj 8y ago
        Are you allowed a high fence (assuming neighbours don't object)? What if it's virtually invisible, like nylon fishing line? What if the fence is incorporeal, like an ultrasound "barrier".
        • jtbayly 8y ago
          Fence height restrictions are quite common. Not sure about whether they are limited to "visible" fences. I doubt it.
  • pampa 8y ago
    Or you can use a stick https://www.youtube.com/watch?v=uhbuEUoxntQ https://www.youtube.com/watch?v=uhbuEUoxntQ
• josefresco 8y ago
  over your property How much airspace do you own over your own property?
  • 0xcde4c3db 8y ago
    I read "over your property" as already implying that the airspace isn't your property.
    • josefresco 8y ago
      I honestly didn't/don't know. How far do you own down?
      • mijamo 8y ago
        Depend of the country, in France it's to the center of the earth, which means you receive some money when they build a metro under your house becaude they buy a right to use part of your property.
        • lainga 8y ago
          Iceland invaded by French Marines; geothermal energy in magma was "not theirs to take", says Macron"
      • pbhjpbhj 8y ago
        In UK I'm pretty sure it's nothing, certainly you don't get anything (money/rights) if oil or coal is extracted from beneath your property ... but then people are allowed - with planning permission - to build down from established property. I expect the Crown owns it all.
  • PeterisP 8y ago
    IIRC it's all the airspace until the 'general aviation' zone starts, where the owner still has some control but FAA or other local authority legally requires property owners to permit operation of planes and other properly licenced aircraft. There's not much court precedent yet, and many places are passing specific laws to clarify this, but the general assumption should be that unless you're above 400-500 feet where national aviation regulations apply, you'd need a permission from the owner of the land.
• StavrosK 8y ago
  Depends, not all drones use gyros.
  • falcolas 8y ago
    All drones do use gyros - they couldn't remain level without having rotational awareness. Accelerometers are the sensors which are optional. The earliest drones used actual model helicopter gyros, the current generation have those sensors soldered onto the control boards.
    • StavrosK 8y ago
      Not all drones remain level. Racing drones rely on operator input to remain level (it's called acro mode).
      • falcolas 8y ago
        The PID cycle that controls the rotors, even on racing drones, relies on the gyros to provide the feedback potion of the PID loop. That feedback is "what is the current yaw, pitch, and roll of the drone". Even in acro mode (which is more accurately defined as "the sticks determine the yaw, pitch and roll rotational velocities"), the gyros are used to measure the actual rate of rotation so it can be matched against the requested rotational velocity. Positional stabilization, something you see more in the higher end drones, have an additional PID loop that takes input from the gyros, accelerometers and even GPS to determine the input to the underlying control PID loop.
      • detaro 8y ago
        And (roughly) Acro mode needs a gyro to control that the rotation matches the user request, whereas self-leveling needs an accelerometer too to figure out where "down" is.
• mikeash 8y ago
  Destroying other people’s property is usually illegal. I don’t think it becomes allowed just because it’s somewhere you own.
  • pbhjpbhj 8y ago
    Hmm,I wonder ... In UK I gather you're allowed anti-climb paint - which damages clothes - to prevent unauthorised access (trespass, say); but you're not allowed glass or spikes which damage people too. People usually signpost use of deterrents, I'm not sure that's a requirement, probably just part of the deterrent. So there's certainly precedent for damaging others property to hinder "trespass". You're generally allowed ultra-sonic devices like cat scarers that deter people's pets from gaining access to your property, and whose effects impinge across property boundaries. So I reckon as long as you signpost "ultra-sonic deterrent" then the onus is on those who're infringing your privacy and peaceful enjoyment of your property to avoid any potential damage by avoiding your property. Aside: Not sure how far the law has come but there are guidelines from CAA saying not within 50m of another person, not within 150m of built-up areas (eg https://publications.parliament.uk/pa/ld201415/ldselect/ldeucom/122/12205.htm#a13 https://publications.parliament.uk/pa/ld201415/ldselect/ldeu...).
  • dalore 8y ago
    But the ultrasound isn't damaging it. It's just causing interference. That's like saying my radio is damaged when it gets interference from my mobile. It's not actually damaged, it could be damaged from the fall but you didn't create gravity.