In the mountaineering and ski touring World weight means everything. Its simple physics that the amount of energy to elevate an object is equal to mass x gravity x height raised, hence why we are all obsessed with shaving a 100 grams off one bit of kit or another. For example, in theory to raise 1 kg 1000 m in elevation take 1 x 9.81 x 1000 = 9801 J or 9.81 kJ and that does not account for significant the additional frictional losses from walking or skinning or wind. So it can be seen that carrying one kilogram less will easily result in the energy from an extra bar or two being saved, plus the added benefit of moving faster and more easily and saving the accumulated strain on your neck, shoulders and spine.
In the last 2-3 years we have seen big advances in ski touring boots and skis. Right now a pair of boots weighing 2.4 kgs skis 90% as well as a 4 kg pair of boots did 3 years ago and the same is true with freeride touring skis loosing 1 kg/pair over the last few years – thats a 25% weight reduction.
Our attention to our kit should not stop there, every item of your gear clothing, hardnesses and equipment should be scrutinised for pack size, weight, is it overkill, can I make do with something lighter? This goes for clothing, harnesses, backpacks, crampons, axes, ropes, etc. As an engineer the downside of reducing the weight of an item is the fatigue life is reduced, and for the majority of us fatigue from every day use is the governing factor in the design life of an object. For those of you who are heavy on kit then the overall strength of an item will be the governing factor and maybe going light is not right for you.
Petzl have done an amazing job with their Laser Speed Light ice screws reducing the weight from 192 g for a steel 17 cm screw to 101 g for the ‘light’ version, thats a weight saving of 91 g per screw. Thats 1.1 kg saving for 12 screws in a cascade rack! So how is this possible? Ice screws have been around in the steel form for decades with the main innovation being the introduction of winder handles for quick placement and removal. About 20 years ago there was a short period where titanium made and entry on the scene with larger diameter tubes but these were difficult to sharpen and poor quality control of materials from Russia often meant these were unreliable. Petzl have taken a step back and have engineered a screw with an aluminium hanger and tube with hard steel teeth bonded to the tube to cut through glacial ice. Petzl technical spec states there is unlimited lifetime on laser speed light so there are extremely confident in the new design.
So far I have used mine for climbing alpine faces where neve and ice are present or for ski touring where I’m most likely to use them for an anchor on glacial ice or for creating an abalakov v-thread anchor to abseil from. For ski touring its brilliant as 99% of the ice screw is just a precaution for glacial travel and rarely used in anger and I have not noticed any difference in performance between the ‘light’ and the steel versions.
Price wise they are only a few euro more than the steel version so make sure you check them out.
17 cm with bue winder handle and 21 cm with the green handle. 13 cm are also available
The steel teeth on the laser speed light
17 cm laser speed light on the scales at 101 g
17 cm steel laser speed on the scales at 192 g. Thats 91 g heavier than the light.
Equalised double abolokov in the shaded cooler ice backed up by the ice screw.
Skiing in wild places with exposure after coming through an icy mixed section
September 2015. Me racking up under the Grandes Jorasses photo : Ben Tibbetts
Heading up the initial ice field on Michto – Polish, Grandes Jorasses. Photo Ben Tibbetts
Its starting to get steeper now. Photo Ben Tibbetts
Shacking out on a small bulge. Photo Ben Tibbetts
Ben Tibbetts enjoying the sunshine on the summit ridge