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From: Matt Broze <mkayaks_at_oz.net>
subject: [Paddlewise] Subject: Re: Skeg Jammers etc
Date: Tue, 29 Jun 2004 23:55:47 -0700
steve
http://mail2web.com/  writes:>> <<

Matt Broze writes...
Not opposite at all. I've got nothing against authorities, as long as....

<<big snip>>
>>one must also realize that the same vessel that 'balances' so nicely in
the
speeds (both wind and paddling) most people paddle at/in may have a
tendency to slide out of that balance as the velocities increase. Even to
the point where scootching your seat/footbraces doesn't help.<<

It helps but like lifting the skeg or turning (or lifting) the rudder it may
eventually not be enough to compensate for the forces involved. This is also
true of all kayaks once the wind speed and wave effects overwhelm their
weathercocking tendency (while it is certainly a constant annoyance in side
winds the actual strength of the weathercocking force is relatively small).
Going down wind the sterns of the weathercocking kayaks will blow over
easier than the non-weathercocking (other things being equal) making
broaching in following seas worse to boot. However, things are never really
equal, depending on the kayak's design and the wind/wave conditions, some of
the least controllable (strong weathercocking) kayaks I've tested were also
among the very hardest to turn up into the wind. One has to understand the
factors involved and design shapes or systems to overcome handling
characteristics you don't like. Our kayaks are specifically designed to turn
into higher winds than most others can do (given the same skilled paddler).
I used to go out and have fun kayaking in the storms that later got names
attached to them. I know what an extreme wind can do and our kayaks are
designed so that a skilled paddler can handle those conditions better than
most other kayaks of a similar size will. High wind and surf handling are
very important to us. How many other kayaks do you know that can back surf
in breakers without rear endering. I wouldn't send a novice out in either of
those conditions in any kayak though (except in very controlled
circumstances) because if you are not skilled your later remark about Japan
could be true. Because I got good at these conditions by experimenting and
practicing in them I wrote some articles for Sea Kayaker about paddling in
high winds and also include detailed tips on how best to deal with them our
"Paddling" manual (last half) under "Handling Difficult Conditions" and
"Paddling in Extreme Conditions". One might expect that (especially since it
is also my livelihood) designing kayaks for extreme conditions might be
something I've thought a lot about.

And what about reverse?  when going backwards how does this nicely balance
hull behave?  Was it designed to even go backwards?

It was designed to easily back up over kelp but not for going long distances
in reverse. In fact, Mariner kayaks are not my first choice for a backwards
kayak race. One reason is that they have a very strong weather helm in
reverse. Of course, I'd stay away from having the rudder or skeg down when
going in reverse as well. Everything is a compromise, we traded more weather
helm in reverse for little or none going forward. We think this was an
excellent trade as we spend 99.9% of our paddling time not going in reverse.
I've not paddled with you, maybe you like to spend significant time
traveling like a rower looking at where you have been. If so one of ours
would not be a kayak I'd recommend for you. Of course, you are most likely
still left with a kayak that weathercocks both when going forward and when
going in reverse. Actually, I like the strong weather helm in reverse
(except for in those backwards races) because after sitting still and ending
up relatively broadside to the wind it only takes me about two easy strokes
straight backwards and wal-la just like that I'm facing downwind ready to go
(or have made 1/2 of my 180 degree turn with minimal effort).

Most loose tracking, balanced boats will have a tendency to weathercock and
most straight tracking hulls will have a tendency to leecock given the
'extreme' example scheme that Matt describes.

I'm not sure what 'extreme' example schemes you are talking about because
you didn't list them (and couldn't find them rereading the post you referred
to at the beginning.. I'm also not sure what you mean by "balanced" here
although I suspect you mean blows straight sideways downwind when not moving
forward or backwards rather than balanced while moving across a side wind.
If the wind is not extreme then I can agree with only the first sentence
because the stiff tracking kayak may well weathercock as well. If you mean
"extreme" wind then I can't agree with the first sentence because those
kayaks will be held sideways as well once the wind pressure overcomes the
strength of the weather cocking tendency (but won't be as difficult to turn
as the stiff trackers in any condition).



>>In a strong offshore breeze here in Oregon, we say "Call me from Japan!"<<

This depends on the paddler's skill and a whole lot of other design factors
other than whether the kayak weathercocks in a side wind or not.

Matt Broze
www.marinerkayaks.com
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