Making an Apple Puzzle


(YouTube link)

This is going to be so neat the next time you hand an apple to your child! If they ask you to cut it, just tell him/her you already did. Then enjoy their puzzlement as they try to figure out how you did it. This video is from our own David Israel.  -via Geeks Are Sexy

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Yeah, I'd add a hand crank to that retrieving the kite thing. It wouldn't be that hard, so then you could repeat the process over and over. Just add cheap labor, or in the case of post-apocalypse, the young, and generate away! :)
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Again, in post-apoc world, you don't want to draw attention to yourself, plus there's the potential for mobility with this design. May have to break camp and head to the mountains.
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I'm having trouble grasping how this is an improvemenet over a windmill. I suppose you could let the kite out, have it collapse, and then have a wind-powered device to reel it back in; but then why not just use the wind-driven device to generate all the energy in the first place?
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The advantage is that they fly "to altitudes of 2,600 feet, where wind streams are four times as strong as they are near ground-based wind turbines."
The kite collapses when it reaches the end of its tether, so it is easier to rewind.
What happens when the wind stops and the huge kite crashes at the end of a half mile tether?
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A 'laddermill' would even be better: it is fully wind driven (so yes, it's a modern version of the windmill. Only much bigger and much more energy efficient.

http://www.lr.tudelft.nl/live/pagina.jsp?id=8d16d19a-e942-45aa-9b52-48deb9312e92
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