Originally Posted by ssh
Well, you've said that you're in the top 1% of skiers on the mountain at any time. But, you didn't engage with me in an engineering discussion, and I seem to remember that you mentioned that you were in undergrad at this point. Therefore, this statement is completely, utterly rediculous.
So, you see no issue with extrapolating even in the face of extensive disagreement from those who have experience in the face of your ignorance? Such insistence is hardly likely to lead to any learning at all, and simply provides evidence of a prejudicial approach to debate that has made this conversation so fruitless.
I assure you that it is rare, indeed, that I ski under 25mph.
You do not know what my engineering qualifications are, but assure you I am not an undergrad. Re-read my previous post. I am quite certain my credentials in engineering expertise, skiing ability, and variety of skis skied/owned, *overall* or *in total* or *summed*, exceeds yours. You managed to incorrectly calculate the space required to perform linked turns in another thread, where I had no problem with it.... all that was required was basic high school trig, and some realistic assumptions.
You also seems to have forgotten about centripetal force. Please have a look at this calculator:http://hyperphysics.phy-astr.gsu.edu/hbase/cf.html#cf
For a 200lb person to sustain a 10m arc at 35 mph, you need to deliver 500 lb of certipetal force by standing on the ski edge. If you weigh 200 lb, your center of mass needs to be at 68 degrees from vertical....a pretty high edge angle. While this is totally possible on a lifted, wide, 25m sidecut ski, it sure as hell isn't going to happen on a 12m ski - you will be totally overskiing the sidecut. If you try a 5m radius slalom turn at 35mph, you need 1000lb of centripetal force, and a 78 degree edge angle...while this may be physically possible, I doubt most skiers can perform something like it. What's more realistic? How about a 5m turn at 20 mph, where the edge angle required is only 58 degrees, or 10m turn at 20 mph where a 39 degree edge angle is all that's required. How about 30mph, 8m radius...nope, that's going to require a 68 degree angle. Granted, I don't know the exact arc shapes the metrons form when put on edge and bent, but it is obviously going to be much less than than their measured radius at high edge angles.....definitely not 8m at 68 degrees, etc. If you did have a table of arc shape vs. edge angle, you could back calculate and find the optimal speed any given turn shape. In a nutshell though, you will pretty much be oversking the sidecut at above 25mph.
If you do indeed ski at over 25mph regularly, I suggest buying a ski with around a 20m sidecut, so you aren't constantly skiddering down the hill.