In my previous write up on trajectories, I hope that
I have you convinced of the power of trajectory. This
one is designed to help you learn to develop and exploit
the potential of trajectories in as many ways as possible.
In reality, the boat is always on some sort of trajectory,
and the key is to not just recognize what path the boat
is on at the moment and adjust it: the key is to understand
what path of trajectory the boat is ABOUT to be on and
adjust it BEFOREHAND. The is a simple point that is constantly
hammered in all instructional classes; that you have
to look downstream, and stay one step ahead of the action.
With that in mind we're going to look at a few examples
to help you begin to develop your skills and better utilize
the rivers currents.
One of the easiest and most predictable types of trajectories
that you've already played with is that of the Peel-Out:
a combination of angle, speed, and edge, and of course
the speed and angle of the current, all work together
to push your boat out into the current in an arc. We
know that there are simple things that we can do to control
what type of arc this is (sharper, or wider), and we
also know that we must assess what the current is doing
in order to choose the ideal combination of angle, speed,
and edge from our kayak. This small simple analysis,
and action, has huge ramifications in how we deal with
other situations on the river as well. Take for instance
the S-Turn: depending on what type of arc we set up in
our peel out, and how we maintain or adjust it along
the way, will be the determining factors of how and where
we catch the eddy on the other side of the river.
So when we are looking at a big rapid, especially one
with some critical must make moves; we must begin to
calculate how one move will affect the next one. Often
the timing of a move (or even a specific stroke) is of
crucial importance, and a poorly timed move will then
have a negative impact on the next move; thus initiating
a downward spiral of loss of control. One trick that
many people use while scouting, is to look at the last
move first: by having an ideal goal of how they would
*like* to do that move, that will often influence how
they would do the move above it, and so on, possibly
having a huge influence on how the rapid is even entered.
This strategy is obviously much harder when you are in
the middle of a rapid that you didn't scout. Ever had
the experience of making a simple decision to go to one
side of an obstacle, only to then find yourself being "herded" in
one steady direction by the next several obstacles? You've
basically made several choices by choosing which side
of the first obstacle to pass by.
Ok, so this is all sort of random theory at this point,
that could probably be summed up in one simple sentence:
Proper Prior Planning Prevents Piss Poor Performance.
But if only the planning part was obvious or easy! So
here are some more specific examples to help expand your
personal bag of tricks, and help you to exploit the power
of trajectories.
JET FERRIES: One of my personal favorites! Jet ferries
typically use some type of wave feature to help the boat
plane out and stall the downstream movement of our kayak:
thus nearly all of our energy AND the energy of the current
are focused on moving our kayak laterally! This is the
ultimate in using the force of the current to help us.
Often, however, that wave doesn't go all the way across
the distance that we may need to ferry, in fact many
times we don't really have much of a wave at all to use
when setting up for a big ferry.
For this example imagine that we have a large wave
starting out next to our eddy, but then gradually flattening
out to nothing, still far short of our intended ferry
to the middle of the river. Looking at this problem,
we want to leave the surfing portion of this (partial)
jet ferry with as much momentum as possible. This is
where timing can really pay off. I see this type of situation
all the time, and one of the more common reactions to
paddle as hard as possible coming out of the eddy; the
exact wrong action to take. Instead, the idea is to try
to stay as high up on the wave as possible, and, just
before the wave starts to flatten out and stop offering
any assistance, we want to then begin to accelerate diagonally
down the face of the wave. The delay tactic is allowing
us to get as much speed as possible at the moment where
we most need it: when the wave stops helping us. All
that speed coming out of the eddy would only send us
lower in the wave, not only wasting our energy, but also
takes away our ability to develop the extra speed of
dropping down the face of the wave at the far edge; thus
the difference in trajectory at the edge of the wave
would be dramatically different in these two strategies.
LATERALS AND
CUSHIONS: Particularly in big water, you
will need to pay attention to waves, and the effects
that they can have on your boat's trajectory. This is
one place where the gung-ho, paddle hard types usually
do pretty well; by keeping speed, and punching through
the lateral waves, it's easier to stay on course. Where
you can have problems, however, is if in your maneuvering
you end up taking big waves at an angle or with little
speed. These waves can act as huge deflectors, and in
big water you can find your self very quickly way off
line. This can be a small, but important thing to pay
attention to.
The big thing to remember is that if we know that these
waves can push us accidentally off course, then we also
know that we can be deliberately pushed on course. When
reading your water, try to identify any waves or cushions
coming of rocks that could either throw you off line,
or any that you could use to help establish a positive
trajectory for a key move. Cushions, in particular, can
be very dramatic in establishing lateral momentum of
your kayak, just be sure to brace into them or you can
find you boat developing upside down trajectory. Hint:
for all you running the North Fork of the American River,
look for a classic cushion move in "Bogus Thunder" rapid.
AUGURING
IN: Trajectories aren't always about going
fast, quite the contrary; often you'll have more calculated
and precise trajectories by going nice and slow. While
I am not typically a fan of back-paddling in the middle
of a rapid, there are some times where being able to
slow things down a bit can be helpful. The trouble is
you don't usually want to establish a pronounced back-ferry,
which is what is happening every time that you start
back-paddling in the middle of fast water. That's were
you can sometimes "auger in" to a small hole
to slow things down a bit.
While most of the time we are concerned with punching
holes, and trying to NOT be stalled out by them; there
are some times, with the right type of hole, where it
may be helpful to auger in a little. All that you want
to do is allow the boat to sink into the backwash a bit.
Rather than boofing the hole, or getting a huge amount
of speed up, you want to let the bow drop into the backwash
with just enough speed that you don't stall too much.
This can also be used in cases where you are on a trajectory
that you don't want to keep: say that you are in a narrow
chute that hits a hole and then heads towards an undercut.
In this example you definitely would not want to keep
the same trajectory that sent you towards the hole, so
slowing down in the hole long enough to change directions
and take a stroke or two away from the undercut would
be VERY helpful. Obviously an example like this is NOT
a good place to experiment and learn how to do this smoothly!
Try to play around with small pour-overs that are not
to steep, and have a fairly minimal backwash. You want
to get a good feel for how much speed you can have going
into a wide variety of holes, so you'll need to play
around in lots of them at some point in time. This can
end up in a side surf from time to time; both accidental
and deliberate side surfs can still end up being very
useful in terms of slowing our downstream descent, while
allowing us to develop lateral momentum to avoid hazards
or catch eddies.
So there you have three different things
to play with and hopefully get the creative juices flowing.
These are, again, just examples of how to work with currents
and features to develop positive trajectories. All of
this relies most of all on reading your water, and planing
far enough ahead of time to be able to put this into
action. There are VERY FEW paddlers who can smoothly
pull off any of these sorts of things in a split second,
plan B type of move; these are the sorts of things that
take a bit of analyzing to do well. This is also just
the tip of the iceberg, so go out there and play around
with it.