This suspension
device has been created by French kaper Pierre
PICAVET who published it in
1912 in La Revue du Cerf-Volant.
This device is sometimes called
"elliptical suspension" because the cross is moving
on an ellipse curve. When the wind is moving away the camera
cradle, it is far from the vertical axis of the suspension,
and it gets a pitch as the pendulum does.
The simple Picavet
is prone to spin, and a good arrangement of the cross is
necessary to prevent this movement.
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Our
friends German kapers reconsidered it in the 1990th, and
promoted an improvement, the "mini-picavet", as
efficient as the original one, and developed some variations.
Since, there are stabilizing additions, small sails by Brooks Leffler,
and "Feather Kap" by Jones from Airfoil. See also the Picavet III suspension,
3 hanging points with stabilizing bow that I adjusted.
If the kite
jerks strongly, the cradle can leap in the space, and it
happened it has been catapulted over the line, and felt
down on the other side. If hooked in branches, a picavet
suspension is difficult to recover.
Construction
To fix it on the kite line, the
hook described is the most simple and efficient. Make in
aluminum, titan, or stainless steel material, its diameter
is at least equal to the line. The drawing is clearly showing
how to make and fix it.
The 4 strands of the suspension
have equal length : ABD, ACD on one side, and AED, AFD on
the other. The parts of line AC and BD run through a small
ring, and the same applies to AE and FB. These two rings
are important, as they prevent twisting movement of the
rig.
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