Originally Posted by Bob Barnes/Colorado
And if you're interested in the PSIA-Rocky Mountain tasks, you can find the current descriptions here.
We (actually, I) rewrote these descriptions last season. A revised document for 2006-07, which covers Level 1 and Level 2 maneuvers as well, is soon to be released.
As per our pm communications
Bob, how about we consider The Railroad Track Maneuver (RRT
) as a building block, a milestone for performing Medium Radius Carved Turns (MRCT
Regarding RRT Perfection
"Active tipping movements..."
The tipping movements although minimal in this maneuver are best activated and controlled by abduction /adduction of the thighs and complimented by the movements of inside-half lead. I do not agree with shrinking the focus of the movements into subtleties by allocating them to the feet and ankles. Tilting the feet/ankles without lead change and no mention of perpendicularity results in counterbalancing stances and an inability to move in the direction of travel.
Regarding RRT Perfection
"While there is no active twisting the legs rotate passively slightly in the hip sockets. Combined with gentle inclination for balance this will cause a subtle lead change of the skis"
This is very misleading to me and does not act as supporting movements for (subsequent) MRCT
You are implying that the skis/legs are (somehow) rotated to cause a lead change (of the skis). What of the gated stance to set up balance and pressure on the dominant outside ski? "Passively rotated..." do you mean caused by outside forces? If so, this could only be ski/snow interaction IE Deflection. It follows that we must use simultaneous leg rotation SiLR to maintain the parallel relationship required in the maneuvers. In short, you have the fulcrum mechanics of Braquage being used "upside down" (for lack of a better term).
IMO, the correct usage of Braquage is the hips rotating over the femur(s) through the movements of (PREPARATION) inside half lead. Are you trying to employ/impose the sequence of ATS mechanics? Anticipation, Anticipation/release, Lateral projection, Deflection, Braquage. If so, I think it is ill advised.
The posture of inside half lead and that of an Anticipated stance are (statically) indistinguishable but their origins of movement (how you arrive at each) are quite different. One incorporates a (re-orientation) rotational force to the skis and while the other does not.
The diagonally gated (Preparation stance) inside-half lead employs the fulcrum mechanic of Braquage by rotating the pelvis over the femur(s), but does not apply (an appreciable amount of) rotary force to the ski.
I am out of time but I will come back to you. Thanks, Bolter
BTW, check the premium articles in supportor area for Arc Tech.