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johnasmo

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johnasmo last won the day on April 30

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About johnasmo

  • Rank
    Onsie wearing Montucky Humanoid

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  • Website URL
    http://

Details

  • Location
    Whitefish, MT
  • Home Mountain/Resort?
    Whitefish Mountain Resort (formerly Big Mountain), Montana
  • Occupation?
    Yes
  • Current Boards in your Quiver
    Coiler Angry 160<br />
    Coiler Nirvana Balanced 175<br />
    Coiler Nirvana Balanced 182<br />
    Coiler Nirvana Balanced Torsion+ 175<br />
    Coiler Monster 185<br />
    Coiler Nirvana Balanced XXX 170<br />
    Coiler Skinny 174<br />
    Coiler VSR 177
  • Current Boots Used?
    UPZ hard<br />
    Thirty-two soft
  • Current bindings and set-up?
    TD3 step-in & TD3 Sidewinders for hard booting<br />
    Lots of Flows for soft booting
  • Snowboarding since
    1999
  • Hardbooting since
    2005

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  1. Lots of talk about sidecuts in this thread, but little about flex. If you're not ordering a custom board, you better pay more attention to flex and suggested rider weight. Sidecut is not like a dial where you can turn up and down turn size and speed; there's more to it than that. From my experience, flex is a stronger determinant of turn size and speed than sidecut. A stiff board with a tight sidecut will still run fast and big in soft snow. A soft board with a long sidecut will still run slow and tight in soft snow. It's only on icy or very firm hardpack where you will notice them f
  2. Day 2 drop. A few more people on Saturday (see 3:55). Still, without a pond skim and live music, fewer than most years. I liked it better this way.
  3. Carving is my happy place.
  4. Traction where it's needed, without unnecessary rider isolation. Never rode one, but that's my guess. I kicked the bees nest with my first post on page one of this thread, where I summarized my design thinking as: "As I see it, sidecut shape, along with snow compaction or lack thereof, plays a role in influencing the shape it is being flexed into. The board's resistance to being flexed into this shape affects the pressure distribution along the base. How well the pressure distribution matches available friction along the edge affects edge hold. Available friction along the edge
  5. Just my bad form. Hesitation to throw my body downhill early when not carrying enough speed off the last turn. Side effect of completing turns too far, taking too long in transition.
  6. @crackaddictis correct. I retract my statement that they are the same indicator geometrically because depth gives you a single number that is affected by both length and radius rather than just radius. It contains more information than just radius alone. But if you do have values for both radius and length, discard depth altogether, it does not add more information. If you know only radius and depth, but not length, use depth as the better predictor when comparing two boards. We usually know both length and radius, so this is somewhat academic. Even knowing length and radius you can'
  7. Yes, exactly. They explain how they don't want the ski to twist enough to change the direction of carving, but they acknowledge too much TR is a problem for how the ski tracks. If you don't allow some twist at the tip, all the forces must be dealt with longitudinally, and that adds more bounce to the nose. So TR is a variable to be used in tuning the front suspension. Too little is bad, but so is too much. I feel the right reason to use a plate should not be because the board is too harsh to ride otherwise. It should be to isolate the board from your bad behavior/inputs so it can win
  8. Yeah, no. Sidecut depth is a geometric result of the radius. The sidecut depth can't be a better predictor of turn size than radius since it's the same predictor. It describes the same thing about the geometry of the sidecut. But is it a good predictor of turn side? Sidecut acts as a flex inducer, so it can't be viewed in isolation from stiffness when it comes to predicting turn size. At low tilt (hence low flex), it's the majority predictor; as tilt increases, stiffness has an increasing say in the turn size. James is a rock star strong rider. He's going to be high on edge and
  9. I've thought about TR a lot. I find the torsional rigidity in the nose to be a big factor in how harsh a ride feels. The nose is the front suspension of the board and it can be tuned for the mix of performance and comfort that you are after. Back in 2015, I had a build done that had a big carbon butterfly under the base going from ahead of the front inserts to behind the rear. What was known as the Torsion Plus option from Bruce. In almost all other respects, it was to be like a previous build (a Nirvana precursor from 2011). I thought at the time that my mediocre skill level requir
  10. Don't ignore the optics and physics of what is going on with 360 cameras. There are two lenses capturing highly fish-eyed 180 degree views onto two sensors that are stitched together as a frame in the video. Say that image is a 5.7K image (5760 x 2880). Now you want to extract a portion of that image and render at least a VHD resolution image (1080x1920) that's not so fish-eyed. What are the chances that the portion of the frame you want has enough resolution for the quality you want, especially the further from the axis of each lens? There's a trade off between the ease of capturing
  11. No kickbacks. No special arrangement really. I ask for custom builds; Bruce is willing to build them. If he likes the result, he'll incorporate what we've learned into other builds. I spin our relationship as a design partnership, frankly to make myself sound more important. Bruce humors me by calling the builds prototypes and giving me a good deal, maybe even building a few variations to try out. But it's really the same relationship anyone could have with Bruce. It's the same as @Shred Gruumerspec-ing out custom builds. Doing the CNC programs perhaps takes it to another leve
  12. Ok, those terms may be better. But by downforce I meant only the vertical component of the pressure. By friction I meant the force that once exceeded by the horizontal component of the pressure leads to slipping. So static friction or traction.
  13. Wow, I see I'm not the only armchair snowboard designer on the forum. Down the rabbit whole is right. I agree that a board's flex is the main thing in the end. As I see it, sidecut shape, along with snow compaction or lack thereof, plays a role in influencing the shape it is being flexed into. The board's resistance to being flexed into this shape affects the pressure distribution along the base. How well the pressure distribution matches available friction along the edge affects edge hold. Available friction along the edge is a function of downforce and tilt. The tran
  14. Observant. Yes, tip shape is different on that one. Bruce uses a plastic tip past the core and this one is 20mm longer with a different shape to it.
  15. Very stable and very grippy. The result of incremental refinement, these protos are pretty good already. I think of these builds as 3rd generation Contras. Contras got their start as a custom build for me in the 2018/2019 season. To get the shape I wanted, Bruce let me do the math and create the CNC programs that cut it. Most 1st generation Contra’s out there are what I would call a Contra v4 (version 4). Version 1 (first build) proved that the Contra shape had good edge grip and could put it to use in lots of snow conditions. Version 1 worked well in shorter radiuses but felt s
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