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Do skis steer themselves? - Page 6

post #151 of 156
Quote:
Originally Posted by zentune View Post

....sorry if that came across as harsh, i didnt intend it to.

zenny

Difficult to find the time to read long threads such as this one.
post #152 of 156

I guess if you go to the true definition of rotary, Skis do rotate around an axis.  However, if you are to consider increasing or limiting that rotary motion, it will require a twisting of the legs/feet to affect those changes about that axis.  

 

By the way, a sailboat does affect turning by the rudder, which turns the back of the boat on the axis of the keel. That would be very similar to turning a ski by pushing the tails out initiate a turn.

post #153 of 156
Thread Starter 

SnS, here are a couple things to think about...

 

First, if you equate pushing your tails side ways to get some pivoting, to the rudder of the boat; that is not entirely accurate.  You'd have to have a boat with motors on the sides, facing out to the side, that propel the rear of the boat to one side or the other.  Boats don't have that.


its important to understand the way the rudder works.  The rudder works because water slams into it while its at an angle, a steering angle.  That deflection causes the rear of the boat to move to one side or the other.

 

On skis we do not have a rudder in the rear.  However we have a rudder on the front.  The front of the ski is bent into steering angle and that is what causes the FRONT of the ski to be moved sideways....ie...rotated.  And interestingly, this happens more effectively the more the ski is edged.

 

A sailboat really doesn't have any thing that equates to what we do when we use muscular heel pushing to push the tails out, or muscular femur twisting to attempt the same.  

 

Now if you need to have an ever-increasing steering angle for some reason....like a tail fan out....  windshield wiper thing...  or you need to do a big pivot entry, then perhaps some active muscular movements may be needed to either twist or push the heels, but consider that the self-steering effects of skis are capable of pivoting beyond arcs.  The skis really can pivot themselves a bit beyond that carve line.  Not enough for a big pivot entry, but well enough for steering smeared turns!

 

Also, consider that if your skis are edged and engaged with weight, twisting movements are not very effective.  The reality is that if you try to use muscular brute force to create extra big steering angle, then once they are edged and weighted, you're  pretty much left to heel pushing, which has drawbacks.  

post #154 of 156

Do skis steer themselves? I think not. The skis are built with side cut that determines a turning radius. When placed on edge the skis will travel along an intended arc providing there is no interference. Steering is the physical act brought on by the skier.

 

A car will travel in a straight line unless the steering wheel is turned thus turning the wheels.

post #155 of 156
Thread Starter 

Tek Head, to avoid repetition, I suggest you read the whole thread, there is some interesting stuff...you can choose to agree or disagree...

post #156 of 156

Borntoski683, Thanks for your words of wisdom. I spent more time reading back onto the threads. It is IMO that a ski on edge, that is, carving/railed is much more difficult to responded to the steering effort. A skidded turn makes it easier to increase the steering angle with upper and lower body separation through the skill of pivoting.

 

The pivot point on the ski " not to be confused with the skill of pivoting " can vary as to its intended purpose. example Race vs Park.

The pivot point of a ski also varies on Stance and Balance. A skier that is balanced too far forward will find the pivot point ahead of the toes resulting in skidded tails. A skier balanced too far back may have difficulty applying any steering effort.

 

Again this is just IMO..

Cheers

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