I've just got some new skis (link for anyone interested), and I intend on trying out some powder in the North American winter next year.
They measure 125 - 89 - 113mm, tip through tail. They have excellent torsional rigidity, but they still have some good flex in the tip and tail. Overall the carbon does keep them fairly stiff through the centre though, with very quick bounce back. I'll be riding with Rossignol FKS 120 once i pick them up.
Aside from the ski shape and camber, i imagine some of it is a matter of ski surface area and pressure on whether you're going to sink or swim on the surface. I'm currently very lightweight.
I ran some basic calculations using two sets of example rounded numbers on this calculator. My ski is similar to the bottom one.
180cm, 135 tip, 100 waist, 120 tail = 1981cm2 = 307 Square Inch
180cm 125 tip, 90 waist, 110 tail = 1791cm2 = 277 Square Inch
Which is a 29.5 square inch or 190cm2 difference. If we (somewhat incorrectly) assume weight is evenly distributed across the ski, a
- 160lbs (~72kg) person means they are 0.521 Psi on the 100 waist but 0.578 Psi on the 90 waist
- 140lbs (~64kg) person, they would be 0.456 Psi on the 100 waist and 0.505 Psi on the 90 waist.
And so on. Now these numbers are obviously not going to play out real world as weight distribution isn't uniform. But weight should still play a large factor i imagine?
While any ski can go into powder, even a carver, obviously a ski with more float is going to be a bit easier to control. So i'm wondering, will i be more likely to float than sink? Will these skis are being under 3 lbs each (w/o binding) make them easier to control/turn due to their light tip/tail? They are very easy to bring around on piste when making turns.
Thoughts, theories and anecdotal experiences appreciated.