Not to do with the length of the lines particularly, more general one:
In Peter de Jong's NPW plan for quad-lining it, he has a 12" or so line
linking the main and brake sections of the bridle. Does anyone know how
long/short this line should be for larger kites? I've tried removing this
line and it completely stopped flying because the brake lines moved
as far as they could go from the main lines, the wing shape changed, and
bad things happened; that said, though, looking around on the net at
various NPW plans I'm sure I saw one which was quad-lined and didn't have
this joining link.
My guess is that the length of this joining link is related to the length
of the _handles_ you're using -- it doesn't need to be any longer than the
maximum throw you can get from the handles, as far as I can tell.
That said, there may also be something to be gained by not having the
linking line in and tweaking the bridle appropriately..
Does anyone know more about this?