His input there was...
... I would guess that the moment you to begin to create angulation then you can reverse it and widen the radius. When this happens depends on your what you are trying to achieve but in many cases there would be at least some angulation well before the apex of the turn. ...
My response in that thread was that this goes hand-in-hand with Directional Movements at turn finish which enable (or disable) early edge-engagement.
As I responded there...
A major role of Angulation is to greatly increase our turning/balance range of options. If a skier is Angulated to some degree with a large component of ski-tipping caused by it, then that portion of ski-tipping can be reduced while maintaining their current state of balance (all else being equal) just by un-Angulating. In theory, this lets the skier increase or decrease turn radius while not having to change overall CM inclination and thereby remain in balance for the changed radius.
"In theory" because it's not quite perfect due to slope-caused rates of acceleration/deceleration, snow conditions, etc. It's also affected a bit by body type and the way a skier actually Angulates (meaning from waist, hip sockets and/or knees). Ultimately, it still delivers maximum options.
The ideas I'd like to bring up and explore here are related to Turn-Entry Lateral Balance methods and the attributes that support those methods.
As I see it, our current state of lateral balance (and directional movement) just prior to entering a new turn enables/enhances (or disables/disrupts) three turn-entry options.
Three particular ways to enter a new turn are:
- Whole-Body Inclination
- Angulation (meaning progressively increasing Angulation)
- Reverse Angulation (meaning still Angulated to support the old turn)
There are upsides and downsides to each method.
* Whole-Body Inclination (WBI) is easier (and more instinctive) so I suspect most people start out this way, limiting their turn-entry options. WBI generally produces a slower crossing into the new turn and a slower transition onto the new edges providing a longer, more progressive turn entry. This method also leaves open the option to begin Angulating at any time thereafter to control our turn radius while maintaining lateral balance. This method is only a problem when the skier isn't able to do anything else, or is unable/unwilling to incorporate Angulation at will.
* Progressive Angulation into a new turn is more difficult as it's not instinctive to "reach downhill" with the pelvis/hips while moving through transition across the hill. This is uncomfortable in that it feels like we're leaning our tush out to the side dropping off while our feet are left behind (and we are doing just that). This method allows us to progressively control edge-angle right through transition into the new turn while continuously maintaining lateral balance. In many cases skiers using this method may appear to be "banking" right at turn entry - but you'll see them quickly begin Angulating to shape the new turn rather than continuing to 'bank' for turn shaping.
* The final method of turn entry is Reverse Angulation. This is where the skier enters the new turn still visibly Angulated from the old turn (effectively 'Reverse-Angulated' for the new turn).
This happens when the skier completes the old turn in a very flexed/Angulated state and simply topples over (or dives) down-slope to begin the new turn. This skier appears to be 'diving' headfirst into each new turn and immediately goes from high Angulation on one side to high Angulation on the other side. Rarely do we see this skier "straighten out" during transition.
This method feels safer as we're much closer to the surface and it's what we instinctively do when jumping off a rooftop or bed of a truck - we get our CM as low as we can before launching our leap so as to reduce our landing impact. From this crouched position we can also reach farther downhill with our extending/twisting feet to set new edges and absorb each turn-finish more forcefully - thus controlling our speed on steeps (effectively leaping from turn-finish to turn-finish - even though our skis complete their circumnavigation of the turn).
Note that this is NOT the same as progressively migrating from old-turn Angulation to new-turn Angulation. This is an abrupt transition of the pelvis across the skis often seen in Park & Ride skiers who go from one parked position over the edges on the left to a new parked position on the right. This skier seems to hold their old Angulated position until the last moment, then switch to the other side.
With these three methods of turn-entry in mind, what might be the turn-exit requirements to optimize each method?
* For WBI turn entries, I suggest we need a good deal of cross-slope momentum since we're likely to see a slow transition from old-edges to new-edges.
* For Progressive Angulation at turn entry, cross-slope momentum increases our options, but isn't really required. (Though the less cross-slope momentum we have, the fewer our options.)
* Reverse Angulation into turn entry is such an abrupt thing that it doesn't require any cross-slope momentum and is even supported by continuous down-slope momentum.
Thoughts? Comments? Tomatoes and Rotting Produce?