Wireless Power Transfer to UAVs

A video caught my eye on fb but it wasn't what I expected -

The video shows a quadrocopter with some coils around the outsides of the motor arms flying over an array of coils, inducing a current on the stationary coil to power a small LED light.

https://www.youtube.com/watch?feature=player_embedded&v=iE9hwguNQyg

Then I watched this video that shows wireless power transfer - used to charge electric toothbrushes for example.

https://www.youtube.com/watch?v=r1UT4NuygmQ&feature=related

The video clearly shows that there is a narrow band that the receiver has to be in for it to power the LED.

I'm thinking if there were a long-range version of this that could also track the multicopter, if it were kept in line-of-site, it might be able to power the multicopter, saving about 1.5Kgs in batteries.

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  • Very short range, very low amounts of power actually transferred, and would put out illegal amounts of radio noise.  There's a reason we're not driving around in electric cars powered by cables running under the roads.  It's been proposed countless times, it's just not workable.

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