I think I’m in love with this piece of gear. It uses a logarithmic spiral to convert downward force into a normal force on the sides. Physically, it holds independent of the pull force, as shown in the next photo. The condition only takes into account the friction coefficient. It can work in perfectly parallel cracks witch is amazing. A logaritmic spyral is a curuve with this parametric equation in cartesian coordinates:…

While I was on a glacier yesterday, we were practicing some crevasse rescue operations. The glacier was covered in deep snow. The most common thing to do when a person falls into a crevasse is to firstly secure the person with a glacier sling attached to an axle placed vertically. Then you have to make two fixed points to recover the person with a hoist. In the case of a glacier exposed with ice, you can simply use ice screws, but in the case of yesterday’s scenario, it is common to dig an axle with a sling coming out and build an anchor from it.…

Every cycling daddy I know in the week-end goes out for 150k rides without eating… Carb the fuck up You might think that during low-intensity rides (regular pace for a >100k ride), your body primarily burns fat for fuel. While there’s truth to this, recent evidence suggests that even at low intensities, carbohydrates play a significant role in fueling your ride. Let’s break it down with some math: Consider a comfortable Zone 2 (Z2) ride, averaging 200 watts for 2 hours.…

Got some issues with absolute black oval chainring: shifting after not many km is impossible. Also issues with powermeter displaying too many watts :(( i’m gonna give a physical explaination soon…