Activity for Jasper‭

Type	On...	Excerpt	Status	Date
Answer	—	A: Most practical knots for a bend (tying two ropes together) while pulling to create tension? My favourite knot would be the taut-line hitch. While it is usually tied to form an adjustable loop, it can be used to connect two different ropes. It has the benefit that it can be tied rather easily with some slack and then adjusted for the required tension with both hands. In the pictures below i... (more)	—	about 5 years ago
Answer	—	A: Cycle of actions and voice signals on a multipitch climb The German mountaineer and safety expert Pit Schubert advocates to reduce the signals down to two: (I'm reusing @Ben Crowell's terms since I know only the German words) Leader to belay: "Alice, off belay" (German: "Stand!") when the leader has built their own anchor point. If there is a line of si... (more)	—	over 5 years ago
Question	—	Cargo capacity of a kayak I've been paddling three times (one week each) in rental (Canadian) canoes. My girlfriend and me brought all gear and food with us and there still was plenty of room for our dog in the boat. I know from internet "research" that kayaks provide less space, but I'd like to try using one in the future d... (more)	—	over 5 years ago
Answer	—	A: What is this plastic net with a wide middle and bottom that looks like an upside-down flower hanging from a tree? I'm pretty sure it's some kind of a suet cake/fat ball, i.e. bird's food, see the first image on the Wikipedia article: https://en.m.wikipedia.org/wiki/Suetcake (Luc Viatour / https://Lucnix.be) (more)	—	over 5 years ago
Answer	—	A: Require advice on power conservation for backpacking trip How much margin due to charging inefficiency should I add when calculating the size of batteries needed for a trip? You need approximately 50% more due to inefficiencies while charging from a power bank. How much energy you really need will depend a lot on the actual usage, so you'll have to make s... (more)	—	over 5 years ago
Question	—	"Large" eye of tie-in knot: dangerous? There's a dispute in my climbing group whether a "large" eye of the tie-in knot can be considered dangerous. While I don't see a problem with a loop that is about 10 cm across, others argue that the loop should be as tight as possible. We're climbing indoors and use figure-of-eight or double bowlin... (more)	—	over 5 years ago
Answer	—	A: Does an ice chest packed full of frozen food need ice? If you look for the manufacturer's promises for these "passive" boxes (there is absolutely no cooling, just the attempt to keep the cool in - called isolation), they usually state something around 24h to keep things cool. You don't even have to start thinking how the manufacturer got to this number... (more)	—	over 5 years ago
Answer	—	A: What would the advantage of a piercable butane canister be? The advantage of the "one way"/piercable canisters is that they are way cheaper (up to four times with respect to price per mass of gas according to German Wikipedia). Also they are "good enough" for many purposes, I.e. when you can leave the stove or burner attached for the lifetime of the canister.... (more)	—	over 5 years ago
Answer	—	A: Can butane be transferred from one pierceable canister to another when its below the boiling point of butane? No. The butane will vaporize below the boiling point, just as water vaporizes below 100°C. (more)	—	over 5 years ago
Answer	—	A: How much margin due to charging inefficiency should I add when calculating the size of batteries needed for a trip? The overall efficiency from a power bank to a smartphone battery is about 2/3, according to this source: https://www.powerbankguide.com/powerbank-capacity-explained/ The amount of energy a battery can provide depends on its voltage (nominal 5V for a USB power bank), the size of the supplied curren... (more)	—	over 5 years ago
Question	—	What are the most important numerical features to look for when comparing climbing ropes? When comparing dynamic ropes (single ropes) for climbing, which properties do really matter? I'm thinking about weight per meter and price, maybe diameter for very special belay devices. I'm going to use the rope indoors, and something like 80/20 for toprope/lead. (more)	—	about 6 years ago