Sunday, April 4, 2021

Seeking speed on skis

Recently, my blog about the “Jerry Tuck” made me think deeply about seeking and gaining speed on skis, as we are going through an unprecedented warm period in the end of our ski season.

I’ve also combined some regular testing with my daily ski outings and this is what I’d like to add as a list of key facts in order to move fast on any snow. Following are my most recent observations and conclusions: 

  • Snow: Snow quality plays a huge role, from sticky slush to super-fast ice, but has the same impact on all skiers. It also includes exposure to sun, shade, etc. 
  • Skis: The base and edges should be as well prepared as possible. Adding certain texture to the base will improve gliding performance on some snow. Wax is of course paramount. Longer skis glide better than short one and of course, they should be kept flat on the snow, geometric position that is often compromised by too stiff a position or a narrow stance from the legs. 
  • Weight: Plays a key role and is the sum of the skiers natural weight and their equipment, including skis. Generally, its fair to say that the heavier skier moves faster. 
  • Clothing: The key is to break the air in the most efficient manner and minimize air turbulence, so a speed suit will provide the best attire to attain top speeds. At the Flying Kilometer level a special helmet and lower pants with airfoil will enhance aerodynamics 
  • Poles: Can play havoc with speed as they create significant levels of turbulence. A bent downhill pole should be preferred as long as traditional tucking is used. 
  • Body position: Tests in wind tunnel seem to show that the traditional tuck works best and minute positioning of the hands, arms and legs have a large influence on reducing turbulence and affecting a skier’s aerodynamic resistance. To my knowledge, nothing that I’ve heard shows that the “Jerry Tuck” performs better than the current Tuck used by Alpine racers. 

That’s it; so, if I forgot anything, please let me know. So in order to be sure, and to be aerodynamically correct let’s bring it and test it at the Audi wind tunnel!


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