For a carved turn, the sidecut of an edged ski helps create the curved path of a round-shaped turn. For this to occur, the front of the ski must cut a groove in the snow and the ski must travel along the groove. Tis requires the skier to move forward through turn initiation, pressure the front of the ski, and engage the edge in the snow. For a carved turn, pressure is predominantly on the outside ski, edge angles can be very high, and rotational input is minimal. Te performance of a mogul skier may be very different. A primary concern in bump skiing is the ability to rotate the skis (often quite quickly) to effectively match the changing terrain shape. To accomplish this, leg rotation is generally the most effective form of rotational control. To effectively apply leg rotation, a skier must be reasonably centered along the length of the ski (and foot). For skiing the bumps, rotational input is significant, pressure is centered and may be more evenly distributed between both feet, and edge angles are adjusted depending on the shape of the bumps and how uneven the terrain is. To recap, turn shape is determined by how rotational-, edge-, and pressure-
PHOTO 2.6: Sideways travel in a turn can also control speed.
PHOTO 2.7: When edging engages the sidecut of the ski effectively, a rounder-shaped turn results.
control skills are blended, and the amount of skidding or carving necessary to produce tactically smart skiing. As terrain, conditions, equipment, and desires change, the skier’s application of technique needs to change, too. Never before have skiers had so many viable turn options.
EDGE AND PRESSURE CONTROL
Edge- and pressure-control skills are strongly interconnected and difficult to isolate from one another. It’s common to work on them at the same time. Typically, higher edge angles increase pressure on the ski, while lower edge angles equate to less pressure. In a sideslip, for example, the skis are tipped to a higher edge angle to decrease speed. Pressure builds as the friction on the snow increases. As a skier flattens the skis, speed increases and pressure is reduced as friction decreases.
42 PSIA ALPINE TECHNICAL MANUAL
TheSnowPros.org
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