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Having one day encountered
the problem to frame and center in a relying way an archeological
area, I realized that it was ont so easy. Later, even with
the video feed-back, the need for a well positioned rig
was found necessary for the vertical shots.
On thinking it during some years,
it comes out to the tie-bar here described, which is finally
simple. With a good spotting of the wind direction, and
with some geometry, it is very easy.
Start to launch the kite and tie
the line at A.
This device is made of one 330mm
long bar, hung to the kite line A-B with a strand. To each
end of the bar are fixed the side lines C and D which must
be enough far away one from the other.
On the drawing, look at the lines
shown white:
The side lines are in fact only
one cord. I tie to the ground the end C, I unwind the necessary
length until the bar and I come near A. With a lark knot,
I put a swivel on this line, then a second one 400mm further.
I continue to unwind an equal length of line until D and
I tie it to the ground.
The hooking point A must be distant
enough. The swivels are hooked on each end of the bar. The
bar is then hung on the line near A. The camera cradle is
fixed on the bar.
The ascending maneuver can start
, releasing line gradually. Care must be given to the side
lines which must be kept tight, otherwise, the cradle could
twist, and wind up the two side lines around it.
Now the rig is hung as shown with
the colored lines.
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