Originally Posted by ydnar
Still, I don't see how pulling the foot back would shorten the distance that that ski/foot had to travel. Whether pulled back, pushed forward, carving or skidding (parellel or diverging for that matter) the ski foot has to travel the same distance.
The racer goes faster if the outside ski is properly carving even if the lightly engaged inside ski is skidding a bit.
The outside ski can be tipped to a greater edge angle than the inside ski because of our anatomical structure this allows for a tighter carve and a one ski carve to get a shorter radius turn is faster than a two footed skid to get the same radius.
To maintain the long strong stance of the outside leg it is necessary to get the inside foot/leg out of the way. Again, if this requires a limited amount of skid to occor on the inside ski so be it, the gains outweigh the loss.
The important thing in my mind is that the inside ski is kept as parallel to the outside ski as possible. When I attempt to ski at that level I really feel a difference in the drag produced by the inside ski if it starts to diverge as opposed to the minimal drag I feel if I keep it parallel. I think this has to do with the way the ski engages and skids over the snow surface if it is pointed in the direction of travel as opposed to how it engages and skids if is is pointed slightly off the direction of travel. Applying K.I.S.S.. A ski, whether carving or skidding, is faster if it is always pointing in the direction of travel. So a skier is faster if both skis are always pointed in the direction of travel.
Here is the point A-man is trying to make. Many skiers tend to advance the inside foot as they turn. Whether it is tied to anatomy or to our mind being in a 'turn that way' mode the foot will tend to point into the turn producing a diverging ski which is a slower ski. Keeping the foot back helps prevent this. Fact is, I don't think that A-man actually pulls his foot back but just maintains a dynamic tension that keeps the foot from advancing. Something else that this does is to keep the inside foot under the hip so that when the transition occors that foot is in a position, in relation to the CoM, to begin to function immedeately rather than having to adjust its position in relation to the CoM to get into the most efficent stance.
Pulling the inside foot back or pushing the outside foot forward basicly accomplish the same thing. Which to recommend depends on whether I see the excessive tip lead coming as a result of the inside foot being advanced or the outside ankle being flexed to much. I usually see the inside foot being advanced.
ydnar, Actually the outside ski does have to travel faster or the inside ski slower to stay parallel. I can prove this in many different ways.
1. The differential on car slows the inside wheel in a turn to allow some slippage so you don't bind up your axle because it has a shorter distance to travel than the outside wheel. Have you ever tried to drive a vehicle with 4-wheel drive engaged & make a turn on dry pavement. This very subject is what causes that!
2. the farther you get laterally from the apex of a turn the more distance you have to travel to keep up with moving object closer to the Apex. For example, Runner's on a track, boat race, horse race, you get the picture; Why is the inside lane an advantage? Because it is a shorter distance around the track. the farther you get from the inside lane the faster you have to travel to keep up because you must travel a longer distance.
Now relating this to your skis, you inside ski has to go slower or carve a tighter arc than your outside ski to stay parallel. The reason I don't like the consept and don't use accelaerating or pushing my outside foot forward is that it works against my forward body position and maintianing pressure on my boot cuff and keeping my ankle flexed. I don't like my feet or foot in front of my hips. I want my body to go forward towards the apex of the next turn down the hill. Now that is not to say Bode and Killy didn't and do push both feet out in fromn of the at times to get additional acceleration from their tails, but that is normally at the end of a turn not in the belly. read the part in both articles that Olle wrote about forward body position. Pulling your inside foot back allow you to pressure the fron of the boot and turn your inside ski on a smaller arc thereby reducing the skis speed which helps you stay parallel.
Yes you want your inside ski to continue in the direction of travel. If it is skiiding and your outside ski is carving it s moving in the wrong direction. You will never convince me that a slight wedge is faster than both skis tracking , even if there is very little weight on the inside ski. Alos, I have observed skiers that don't pull their foot back and they actually get into a backwards "V"
The inside ski skidding with the tip too far inside compared to the outside.
A little later in your post after saying it's OK to skid your inside ski you say it faster to keep ypour ski parallel. I submit that if your outside ski is carving and your inside ski is skidding it is nearly impossible to keep them parallel because your outside ski would travelin on a shorter arc than your inside ski?
Well I've rambled on enough, but the article I posted the link to that rusty comeented positively on on the 2nd page pretty much agrees with ehat I have been trying to say.
Have a great day!
Over & out!