pulsing and bridle/frame adjustments
The pulsing and bridle/frame adjustment subject seems to have got
a bit wider!
I have 2 cicadas. When I put them together I ignored the bridle
dimensions in the plans because I have a liking for long bridles.
When flying in very light winds recently I put 30 foot lines on.
I noticed that the length of the long bridles in these conditions
causes some sloppiness in control. If I hold the kite in a
stalled position, to make fine adjustments is difficult because of
the slop in long bridles.
It's worth test-flying on very short lines to really see what's
I subsequently made a set of short bridles for one cicada to see
what difference it would make. When I started flying to get the
adjustment correct I noticed the pulsing effect. This was the
nose trying to rise, then falling, about half second frequency. I
can't remember now whether I pushed the bridle point up or down
(yes, I know I should keep notes :>) ) but it eventually fixed the
problem. Having short bridles has given me the instant response I
wanted for low wind/zero velocity (forward speed) conditions.
Time has stopped me taking this any further yet. I can't give you
any dimensions at the moment, but I believe my bridles are
substantially longer and substantially shorter than the design
I like to use long bridles 'cos I believe it keeps pressure on the
frame to a minimum, especially in a stronger wind. It also makes
adjustments less critical since any change in the bridle point is
a smaller percentage of the overall dimensions.
For rapid adjustments I use a no-hardware bridle. The main bridle
is conventionally fixed to the leading edge top and spine. The
outhaul attaches direct to the main bridle by a catspaw. The only
thing that I haven't got a fast answer to yet is the outhaul
attachment to the leading edge lower. I currently use a
constrictor knot based on a clove hitch, which works ok but is a
little slow to adjust accurately. (I've never seen this
arrangemnt anywhere else, so I claim it's the Swann Bridle 8:>Q )
The way my thinking is going at the moment is to have a kite
appropriately bridled for various wind conditions or what I want
to do at the time. Am I reinventing the wheel here?
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