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Crabbing

post #1 of 22
Thread Starter 
A review I read recently said the ski in question was prone to crabbing on groomers. Is this another way of saying the ski washes out when trying to ride an edge or is it referring to skipping and hoppping?
post #2 of 22
Aileron left, rudder right. If I knew how to do this on skis, I'd think I'd died and gone to heaven.
post #3 of 22
Just guessing that the reviewer means turning both ways at once. In an airplane this would be stable way to go into the wind. On skis, a similar concept might be a skidded traverse across a double fall line. However, as a comment in a ski review, I'd be more suspicious of a poorly tuned ski than a poorly designed ski.
post #4 of 22
therusty, PLEASE tell me how a ski truns "both ways at once".
post #5 of 22
One of the PSIA exercises was "crabbing"/slipping in a wedge and it does sound like what Oboe described as left rudder/right alieron.

That however produces a "slip" not a crab. With the power off it's a radical way to get rid of unwnated altitude on approach. I will stand ready to be corrected since it's been twenty years.

Best analogy I can think of for crabbing is my old 65' Corvette. It had been in an accident and had a bent frame. It appeared to be at a slight angle to the direction of travel. Like the crosswind analogy it appears to be moving sideways.

On skis I think this would mean that on a flat surface, while running flat skis, the skis would tend to drift to the left or right. This is pretty unlikley since the sidecut on the right negates the side cut forces on the left.

A. Tester need alignment (see other thread).
B. Tester had a rough night.
C. Stevie Wonder should not be performing tests on skis.
D. Tester needed to invent a word to describe something that he/she did not understand.
E. Tester grabbed an old pair of "parabolics" from the pile but took two right skis?
post #6 of 22
Quote:
Originally Posted by oboe
Aileron left, rudder right. If I knew how to do this on skis, I'd think I'd died and gone to heaven.
Aileron left - the fall line slopes to the left
Rudder right - the skis are pointing right of the fall line in a traverse across the hill.
The edge (rudder) are pointing the skier across the hill, but the fall line (rudder) is making the skier go to the left. Probably the previous tester used the skis on rails, or the nice people in the shop got tired of bad reviews by poor skiers and dulled the crap out of the edge. Or the ski has no torsional rigidity.
post #7 of 22
There are some off-road equipment that has selective steering options. Articulated (bending in the middle) is one and another is Crabbing(all 4 wheels steer) causing a sideways effect like Yuki's Vet.
post #8 of 22
Quote:
Originally Posted by SkierXMan
A review I read recently said the ski in question was prone to crabbing on groomers. Is this another way of saying the ski washes out when trying to ride an edge or is it referring to skipping and hoppping?


Crabbing, going sideways? Yup, a good way to kill the excess speed. Nevertheless, have no idea what "prone" means though, as there are two ways to go sideways, skidding and slipping, both are controlled/controllable maneuvers. For minor course/balance adjustment without disturbing the CM movement/traveling, skidding and slipping can be very affective; to skid, skidding the tail, and to slip, slipping the tip.

And ride a board flat, you'll on a straight course again.

Have fun,
IS
post #9 of 22
TCS .... You post had nothing to do with the topic.

Please get some billboard space, or pay for an info-mercial on TV.
post #10 of 22

I must really be in left field

I always thought crabbing was a term used to describe a ski with enough sidecut (or a firm enough tail) that it resisted skidding. When skied by someone whose technique involved pushing the tails sideways, the ski intermittently grabs and then hops sideways (at least in the tail). It's this jerky sideways motion that invites comparison with the movements of a crab.

I thought that in the early days of parabolics this was one of the big gotchas, that the skis weren't compatible with this particular 'style' of skiing.

However, I am so far off from what everyone else described, that I am feeling a little inadequate.
post #11 of 22
Quote:
Originally Posted by Yuki
TCS .... You post had nothing to do with the topic.


What makes you so sure about your assessment?


Quote:
Please get some billboard space, or pay for an info-mercial on TV.


"So you rather read it as commercial, instead of knowledge? Yup, your envy shows."


IS
post #12 of 22
Dear TCS ...... for the umpteenth time! I can ski like that. I did ski like that.

In 1965.

97% of us "past 40" types can and did.

The man was asking about "crabbing" ..... you failed to grasp that.
post #13 of 22
Quote:
Originally Posted by oboe
therusty, PLEASE tell me how a ski truns "both ways at once".
Aside from the obvious impossibility, if you don't have a clean edge, it's possible to feel the resistance of nicks as force "opposing" the turn. This can be interpreted as the ski trying to turn the "other way". I'm not implying anything different from what other posters to this thread have noted. The main point about crabbing is the sensation of "sideways" movement.
post #14 of 22
The report was describing my mother-in-law.

RW
post #15 of 22
If I could put skis on I could replicate what Oboe is getting at ..... and damn it I just can't do it as a dryland exercise.

In a wedge, if you edge the wrong ski/wrong edge ..... you crab ... it looks like you are going one way but you are drifting the other.
post #16 of 22
Yuki,
You are describing the "crab walk" exercise. From a wedge shape , one ski flat while the other ski's edge is engaged, and then switching. The movement is sideways eventhough the skier is facing forward.

RW
post #17 of 22
I had a woman in a class that was prone to crabbing on groomers too.

RW
post #18 of 22
Hate to dumbly ask but... could the original writer have meant 'Grabbing' and not 'Crabbing'? Was the word used multiple times to validate their intent or used in other comments by other people? Lots of new words get created this way.

Could ya'all be evolving a typo into a real drill or technique?

.ma
post #19 of 22
Ron: Thanks! That was driving me nuts. Keeping in mind that my sanity is relative to phases of the moon.
post #20 of 22
Quote:
Originally Posted by Ron White
I had a woman in a class that was prone to crabbing on groomers too.
chuckle!
post #21 of 22
Quote:
Originally Posted by Yuki
Dear TCS ...... for the umpteenth time! I can ski like that. I did ski like that.
Quote:
Originally Posted by Yuki

In 1965.

97% of us "past 40" types can and did.


Never did say you cannot do that, however, it is how well you do it is in question.

Quote:
The man was asking about "crabbing" ..... you failed to grasp that.


Not sure I agree, what is your "crabbing," again?


IS
post #22 of 22
Quote:
Originally Posted by michaelA
Hate to dumbly ask but... could the original writer have meant 'Grabbing' and not 'Crabbing'? Was the word used multiple times to validate their intent or used in other comments by other people? Lots of new words get created this way.

Could ya'all be evolving a typo into a real drill or technique?

.ma
I had the same thought...


As to the PSIA task/drill I doubt the reviewer was performing a wedge.

But I could buy into the argument the skis had a poor tune and the reviewer kept popping out of his/her rut while trying to rail a pair of arcs.

Why not write to the publisher and ask them what they meant?
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