Crayefish wrote: ↑Mon Nov 21, 2022 3:57 pm
JohnSKepler wrote: ↑Mon Nov 21, 2022 9:40 am
What would be the pros and cons of this softer tip? Trail breaking? Crust breaking? Easier in the grooves? If I switched back and forth between a Gamme and an Ousland what would I notice that would be caused by the tip? I know thats a really specific question that ignores other parts of the ski. It’s all really fascinating and I wish I could just test skis and comment on it for a living!
For sure Lilcliffy will chime in on this one... he has a particular dislike of crust breaking underfoot due to a soft tip not breaking it ahead
I could reply properly, but it would only be 2nd hand info from Lilcliffy, so better to have the expert explain.
Ha! Not so sure I would call myself an expert!
But, yes, I do have a particular distate- HATE- for XC skiing through breakable crust with a rockered ski.
I have MUCH experience with breakable crust- anyone that skis in local climates with extreme winter temperature fluctuations- and ample precipitation- knows what I am talking about.
I moved from Quebec to southern Coastal New Brunswick when I was 10 years-old, and went to college in Halifax- I have much experience with racing-against-time to ski on very temporary soft fresh snow, and then dealing with flash freezing and breakable crust (with soft snow underneath) until the next storm.
Since I moved to the Central NB hills, I thought I had mostly escaped these conditions, but the last two seasons have brought wild fluctuations in temperature, with multiple rainstorms, immediately followed by extreme flash freezing.
We are still getting loads of snowfall- more and more in fact- but, mid-winter rain + extreme cold leads to death crust.
So- perhaps enough blathering...
No one can ski fast enough in the backcountry for a XC ski to plane.
When XC skiing, a rockered ski is pre-bent, which causes the rockered shovel to ride on top of breakable crust- leaving the midsection of the ski breaking trail- YUCK.
A ski with a stiff, low-profile rocker (e.g. Gamme 54) can just get away with it in breakable crust.
At the extreme- skis like the Fischer E99/E109 Xralite are horrible in breakable crust- with the Asnes Sverdrup and Falketind 62 being even worse!
The best BC-XC ski I have ever tested in breakable crust is the Asnes Amundsen.
Advantages of a softer tip?
Softer tips are more flexible- which can be an avantage in certain conditions- can possibly aid turn initiation- and certainly facilitates a fairly wide ski going around a turn in a groomed track.
At the extreme- VERY long Finnish forest skis have soft, reverse-sidecut tips that sort of carve a slice through very deep snow- with the skier supported on the long stable platform (with zero sidecut) that follows behind the tip.
Advantages to a softer shovel?
IMHO there are ZERO XC advantages to a softer shovel.
A softer shovel definitely makes it easier to bend a ski into a downhill turn.
But- a rockered ski doesn't need a soft shovel to bend it into a turn...
Trail breaking in deep soft snow-
I have yet to see any advantages to a rockered shovel when XC skiing and breaking trail in very deep soft snow.
In fact, my personal experience is the opposite.
Again, skis do not plane at XC speeds- therefore, a rockered shovel is simply creating more surface area, resistance and friction.
For example, this is very noticeable when comparing the Asnes Ingstad vs the Combat NATO in very deep snow- the Combat NATO is more efficient.
There is even a noticeable difference between the slightly-rockered Gamme 54 and the Amundsen BC- the Amundsen is more efficient.
NOW- point them downhill- different story! A rockered definitely causes a ski to plane at downhill speed.
XC skiing on consolidated snow?
Rockered skis have shorter effective edges and glide zones on when XC skiing on consolidated snow. The difference is MASSIVE. The Combat NATO is twice as efficient as the Ingstad BC when XC skiing on consolidated snow.
And despite the extra camber underfoot- I remain unconvinced that the Sverdrup is more efficient than the non-rockered, less cambered Nansen on consolidated snow.
Not sure if any of this is helpful- but after more than 10 years of testing Nordic touring skis with rocker- my personal conclusion is that all of them perform beautifully in a narrower range of conditions than their non-rockered rough equivalents.
The Ingtad BC is my favourite Nordic touring ski (when the conditions are ideal)→ the Combat NATO ALWAYS works.
The Sverdrup BC is pure magic (when the conditions are ideal)→ the Nansen ALWAYS works.
The Gamme 54 kinda always works- but I must admit that the Amundsen outperforms it as a straightforward BC-XC ski (I wouldn't have known without access to both).
I am sure there are contexts where the Ousland is ideal- otherwise I would expect it to suck- I personally think I would hate it in my local BC context- but, it just might be ideal in yours!