bungi #1 is at the rear at the bottom
of the rear stantions... this is the first bungi that gets stretched
and is really the only part of the bridling that is always being used....
this is the primary pull point... if you could see the sled from the
side you would see that the bungi connects to a center poly line (which
is taped with black electrical tape, and which extends all the way
to the front loop) underneath the middle crosspiece... so it runs
in a perfectly straight line from the connection in the rear, to the
gangline in the front.
bungi #2 is also in the rear, but 6 inches higher
and is connected at the lower crosspiece. This bungi is a double
bungi which makes it harder to flex. It also does not come into
play until bungi #1 is already under partial load.
This is done by having a few inches of slack in the center poly
line (between the rear and middle crosspiece) which connects the
rear bungi to the rest of the bungi bridal.
bungi #3 is at the front of the sled....
it serves 3 different functions: 1.) it takes out the slack in the
poly line when the bungi bridling is at rest.... as you pull the center
loop the slack is pulled out until the yellow poly line makes a 'V'...
but this is very hard to do. 2.) it helps the sled to steer... the
gangline goes through the steel ring and if the dogs turn there is
an immediate effect on the nose of the sled. This is important in
that when you have a bungi bridal, you cannot fix the loop to stay
center using poly lines without limiting the flex of the bridal, or
pulling the sled from the front of the sled, which I didn't want to
do. (I had to remove the bolts that connect the bushbow to the bottom
of the front stantions and then pivot the bushbow's nose down until
it was almost horizontal and then tied the ends to the center crosspiece
higher up, so that the 'pull' was still in a straight line all the
way to the rear of the sled.) And 3.) as you pull the center loop
all the way forward, you exert more pressure on the front bungi which
doesn't want to see that poly bridal fully stretched out.