Ok, well this was a fun diversion from things around here. Happy to oblige. I decided to take a page from Roelant's test with the clamps, and added index cards for a "card test" which we are all familiar with. I tried to take pictures sighting down the ski but the nuance just wasn't coming out, unfortunately.lilcliffy wrote: ↑Mon Jul 19, 2021 11:55 amI don't think that the Combat NATO ski has ever been updated.
Woods- you also have the current Ingstad- it would help to have that ski in comparison as well.
What I am interested is in the combination of flex pattern and stability in the tail of these Nordic touring skis.
Roelant's examination of the flex pattern of the mid-section and shovel of the Combat NATO and the Nansen is very revealing- the Nansen clearly has a "rounder" flex than the Combat- making it easier to pressure into a turn.
What I am wondering is what the tail flex of the Nansen is like...
The current Ingstad does not have a "round" flex- it is quite stiff and resistant over its length- maintaining stability in deep snow-
the rockered shovel clearly enables planing and turn intiation-
but the stiff tail of the Ingstad is not easy to pressure and smear-
(the tail of the Combat NATO is stiff and resistant as well)
What I am wondering is what the tail of the Nansen feels like under pressure...
Asnes Ingstad 205cm
Asnes Nansne 205cm
Asnes Combat Nato 200cm
Skis were placed shovel and tail on 3 inches of stacked pine. All clamp centers were positioned 75mm aft of pinline to accomodate for the different binding types. I clamped until bases closed under clamps, then slid the cards.
As you can see, big differences here. The Ingstad and the Nansen seemingly share the same tail dynamics, while the Ingstad retains good flat ahead of the binding. The Nansen goes into that banana shape people are always talking about, even without nordic rocker (like the Ingstad).
The Combat Nato holds on to the most contact area when flexed, and it can be surmised that it is the stiffest underfoot.
The distance of the contact point to the tail:
Combat Nato Ingstad Nansen There's only 5mm difference between the Nansen and the Ingstad with the Nansen tail being a tad flexier.
The Nato is 28mm off from the Ingstad, but it's also 50mm shorter. So what does that mean? I don't know if it's clear to discount 25mm off the difference leaving it with 3mm stiffer than the Ingstad, but maybe?