On Mon, 24 Sep 2012 10:53:55 -0700, Steve Leonard wrote:

Interested in seeing the dynamic of a powered winch to reel the line in.
Will have the effect of increased wind speed for the kites, so they
should climb a little higher. First attempts were with people grabbing
the line and walking it towards the reel (yes, the first 200 feet or so
of the line was only 4-6 feet off the ground when we had, I believe,
3000 feet of line). I have seen what this line put on a Home Depot
Extension cord reel does over time. I now have a big mess of kite
string, as it contracted and split the ends off of the reel!

Talking to these guys may give some pointers to what can be done:
http://www.kiterecord.org/kiterecord/

They've had a single kite up to 10,466 ft, but it was a big one: 16 m^2

I also remember hearing that US meterologists got the top kite in a
string to 25,000 ft in the late 1930s, but can't find a reference to
quote.

I'd say that a rocket instrument package would be a good starting point
because its light: put it under a fairly large Rogallo-type kite and fly
it on light, low drag line (Spectra or Kevlar?) and you should get the
height you want. Light and low drag and large are all important since the
kit's lift must support the weight of the whole rig as well as offsetting
the drag of line and kite. Some sort of winch would be good too, even if
its only a geared (multiplier) sea-fishing reel.


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martin@ | Martin Gregorie
gregorie. | Essex, UK
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