>a small to medium parafoil would more than do the trick. You'd probably want
>to stay away from 2 or 4 liners and stick to single line kites. A 2 square
>meter kite (which you could get used for under $200) can easily lift your 36
>pounds in a decent breeze.
I beg to differ. IMHO there isn't a cat's chance in hell that a two square meter ( 20
sq foot ) single line foil is going to reliably lift 36 pounds ( 15kg ) in anything
less than an outright gale. I'd be surprised indeed if it could manage 15lb's
'easily'. If it flies at 70degrees and the line weighs 1 pound, its got to be pulling
39 pounds just to stay in the air ( i.e. anything less, and its coming down ).
If it starts to drift down from that 70degrees, the tension required to stay in a
'lifting' as opposed to 'landing' mode increases dramatically ( although in this case
I suppose that you need only take into account the length of ariel that's actually
off the ground, which would help to offset the effect ). At 60degrees, you'd need it
to pull 45lb just to stay up. You'd want a safety margin - so say it should be
pulling 55lb ( 25kg ) plus at all times.
Now, this might not sound like alot, but 100lb line would be at or slightly beyond
it's normal breaking point and would be like cheesewire, 150lb dacron line would be
so taut you could flick it with your finger and it would 'ring', 300lb dacron line
would be difficult to put a kink in with your fingers. How often have you flown a 2m
single line foil in a 'decent breeze' and observed line tension of this order ? I've
tensioned up lines from 20lb to 300lb on a jig, and it never failed to surprise me
just how *little* force was required to put an apparently ( in kiting terms ) large
strain on a line ( and how much it stretched before it got there, in the case of
dacron ). It struck me that I'd probably never even approached the breaking strain of
my line when flying, even when I was so concerned that I'd brought the thing down and
put on a heavier line.
I've got a 42 sq ft foil, which I suspect might lift 36lb in a strong wind, but I
certainly wouldn't want to bet on it without trying it first. And if the wind dropped
to below the '39 pounds' level even briefly, I'd expect to see it come down fast.
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