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Thanks for your contribution.
Ghost, the yellow vector was merely a resultant of the gravity and centrifugal force. Did not want to show all the forces. Here below I have tried to picture the difference between the horisontal and the vertical componenets as we come from the top of the turn to the bottom. I know SF, its not right to just turn the photo arround but me and Ghost merely wanted to bring the differences into pickture. I wanted to show why you tip into the turn at the top and why you un-tip as you come through the bottom half of the turn. Correct me Ghost if Im wrong.
retroEric, your modified statement is better. The reason is as you say yourself that its easier to create turning forces when gravity is not pulling you very strongly the opposite way. Thats why its called an "upside down" position. You are balancing over your uphill ski insted of your downhill ski.
The big question is HOW do we create turning forces? As we concluded earlier we need to place our skis on edge. But if we are standing on flat ground with your skis on and tip them to on edge by inclining in the direction we want to turn two things will happen: we will fall in that direction to the ground and we will not turn. What are we missing? Why are we falling to the ground? Why are we not turning? We are falling because we are offsetting our body into the turn and allowing gravity to pull on our CoM outside our BoS down and since we have no TURNING FORCES pulling on us in the other direction we will fall to the ground. The trick here is to tip our skis on edge WITHOUT MOVING OUR CoM OUTSIDE OUR BoS! How do we do that? Simple, we tip our skis on edge with our feet and lean the other way with our body to keep our CoM inside our BoS. If we do it correclty we angulate. Now we can stay upright and our skis are tipping. And we are not falling. But we are still not turning. What are we missing? Cannot feel any turning forces building up! Yes, we are missing SPEED! Lets point our ski tips a bit downhill and give us some speed with our ski poles and try the tipping part again. As soon as we tip our skis on edge as we are sliding forwards we should be turning. And we should feel the turning forces starting to build up.
Its all sequential. Turning forces are really only the body mass accelleration in a new direction. The body mass is accellerated away from its original direction (straight forward) by tipping our skis on edge causing turning. When we do this our lateral static BoS becomes dynamic and shifts in the opposite direction of where the body mass is accellerating. If we want to increase tipping we need to overcome the turning forces and this is easier to do in the high C since we are tipping in the same direction gravity is pulling us. The steeper the easier it is to tip, but the harder it is to create turing forces. Poor performance is not tipping enough in the top part of the turn but its all just a matter of a gross estimation. You need to tip as much as you think is needed. Good skiers do this very well. Bad skier eather end up on their inside ski and in some cases fall to the inside because they inclined too much or skidd their turns because they did not incline enough. Just as important it is to create turning forces we need to aggressively overcome the turing forces at the top part of the turn.
Annother important issue is that if you are on a flat slope you dont have to tip much before you have your skis on edge. If you are on a steep pitch you need to come off your old edges and onto new edges. Keeping your CoM low and flexing through the transitions will help you create highter edge angles early on since you dont need to be moving the CoM so much in the vertical direction.
A wider stance gives you a much wider BoS, stronger stance. It also gives you faster reaction time as you can offset your CoM quicker into a turn. A simple flexing of one leg is enough. Thats why racers use a wider stance. Thats why tennis players have a wide stance when they are returning serves. The faster you go the more important this becomes because of stronger turning forces. Think DH and SG. In SL you use a more narrow stance for other reasons.