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Question:

What type of radio could be used to control a R/C helicopter 1-2 miles away?

How are UAV's controlled all over the world without any signal interference?Is it just a really powerful transmission output? Or as I assume, probably using a satellite to bounce the signal?I always thought it would be neat to house a camera and fly my R/C heli from a screen, but you would risk the helicopter losing signal and crashing if it went too far.Are there types of radio systems for R/C helicopters which could allow them to be controlled up to say 1-2 miles away?

Answer:

It would probably require another container in addition to the suitcase, but non-perishable food and water. If you are the only family affected, you can buy that, but if a large number of people are affected or transportation is disrupted, you may not be able to buy food and water for a while.
Try to imagine that rubber sheet on the surface of a balloon that is infinitly getting bigger.
Think in terms of analogies. In 1D you have motion on a straight line in 3-space. You can simulate the distortion effect by pulling the string in a direction orthogonal to the string. The locus of points the pull point can live lies on a plane orthogonal to the line. So you pull in the direction of gravity. In 2D in 3-space, you have your rubber sheet example. The key is that the surface can be deformed orthogonal to itself, and gravity aligned with that direction. then the phenomena with which you are familiar emerges. In 3D in 3-space, you have no free dimensions orthogonal to the direction of motion in which to deform your space. The best you can do is paint a regular grid of lines in space, then observe the lines deform as a result of the applied deformation. But there's no mechanical analogy you can draw since you ran out of physical directions in which to deform space. While the grid lines show you the effect of the distortion, they don't show you the critical piece that you're looking for the direction orthogonal to the 3-space directions which is aligned with gravity and causing space to be deformed. You can't visualize it, not for a lack of insight (abundance of stupidity) but instead you just encounter a shortcoming of your thought experiment. [It'd be like using a blue light to illuminate a space, and looking for an item, only to inadvertently be looking for a blue item, that happens to always be invisible in the field. Nothing wrong with the experiment other than a short coming associated with the light source relative to the object you seek.]

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