Hot answers tagged

61

Comparing hydrocarbons with batteries As Olin Lathrop wrote, the big problem is energy density: hydrocarbon fuels simply offer a huge amount of energy per unit mass, compared to any current battery technology. To put some numbers on this, we can look at Wikipedia's page on energy density. Let's compare ethanol (probably the least energy-dense of the ...


37

The only gear you need is a good, comfortable pair of running shoes and any cheap backpack (extra points for Hello Kitty). There is a popular belief, probably based on pop-culture images dating back to the 1960s, that people need big, heavy hiking boots, or that ankle support is necessary if you're going to carry heavy loads or walk on uneven ground. ...


36

That is a "punch/reamer". It allows your to repair leather (for example). You thread a thread of something though the hole and then use the sharp end to punch/push the thread though leather. In this way you can repair boots, etc.


29

A mug outside the backpack is far easier to reach. In some areas, you will pass streams very often. During my first ever backpacking trip, with a group of Swedish people hiking Kaisepakte – Pessiskåtan – Lapporten – Tältlägret – Abisko in September 2005, most people had a mug hanging outside so that they could reach it immediately. Every 5 minutes or so, ...


27

It is a "reamer with sewing eye", according to the Victorinox Swiss Army Knife Manual (PDF). It is used for punching holes in leather or canvas and can also used to get a thread through the hole, according to SAKWiki


25

The tool has two purposes. As a punch, it acts as a large needle. You can use it to sew leather or canvas, as mentioned in the other answers. Punch the tool through your fabric, put thread through the hole, retract the tool, repeat. As a reamer, the non-uniform blade shape allows you to make quite good circular holes in plastic or wood. Punch the tool ...


23

There are no electric backcountry stoves because there aren't long enough extension cords. Seriously, where do you propose to get the energy from? Batteries of current technology don't have the same energy density by weight or volume as chemical fuel does. Battery technology is advancing rapidly, so some day this may no longer be the case, but today it ...


16

Theoretically, a 1L flask will keep the liquid warmer as there less surface area and greater mass. However, in practise it is really a question of what size insulated (Thermos/vacuum type) flasks are available and how well they work. Non-insulated flasks will not be much good in either case I would guess your liquid would definitely cool within an hour, ...


16

In my experience fitting people with Dive masks frame colours almost entirely come down to personal preference. As others have noted the actual silicone skirt of the masks, as well as the shape of the frame, will have a greater effect on what you can actually see. The most important thing to consider when getting a mask is the fit of the mask, even if you ...


15

Personally I don't do that, because having something clanging against my pack (or my back) all day is guaranteed to drive me insane. Eating equipment goes inside my pack, along with stoves. If I need a drink during the day, I have a water bottle. If I run out of water and find a stream, I fill the water bottle. No need for a mug during the day. ...


15

Twin ropes can be as small as 6.9mm (35g/m), and are only used in pairs; you tie into two ropes, and clip both as though they were a single rope. This provides you with the redundancy of having more than one rope, but without the weight of carrying two single ropes. Twin ropes also allow a full-rope-length rappel which often strongly factors in the choice ...


14

In addition to what Liam writes, since early childhood, I have found that a two-step approach gets out more air. It starts the same as Liams approach, but has some more steps. The approach below works for Thermarest. Open the vents Fold it as Liam says From the far end that does not have a vent, roll it slowly, continuously having one knee on top to push ...


14

Concerning using hiking shoes on asphalt: it certainly can be done and is a much better option than the other way around (i.e. taking a business shoe on a mountain hike). Hiking shoes are a bit stiffer in their construction and might have a little less damping in their sole which can make them a bit uncomfortable to walk on longer asphalt stretches but this ...


14

Besides being the manliest thing you could ever wear outdoors: Durability Have you ever had a flannel shirt, or pair of pants? If you have, then odds are you still have them. They are extremely abrasion resistant, and won't melt or burst into flames if a hot coal from the fire lands on them. There's a reason why lumberjacks favoured flannel shirts, and ...


14

imsodin's explanation (it's a heavy object you bury in the ground, like a dead body) seems very plausible. Just to add some history to it, here's the earliest use of the term listed in the Oxford English Dictionary: a1852 W. T. Spurdens Forby's Vocab. E. Anglia (1858) III. 12 Deadman, a piece of timber buried in the earth, to secure posts, or other ...


13

They don't have certification from the UIAA. As it states on the UIAA official website: The UIAA warns that the following brands may be using the UIAA name and/or Safety Label logo with out UIAA authorization: GM: The UIAA has received email from climbers in USA, Brazil, Finland and Australia that GM advertising gear with the registered UIAA ...


13

Two ways to get started on a hike: with either your right foot, or your left foot :P First and foremost you need comfortable footwear. Doesn't matter what it is to get started, I've led people over mountain ranges and all they wore were cross trainers. When you get more serious into it, then you should determine what type of trails you want to hike on and ...


13

According to this guide, it is recommended when testing to first shoot with fletched arrows before shooting with the unfletched ones, always aiming at the same point. It gives you a control group to compare with the bare ones. Defects in the spine or nocking point position should affect the flight significantly enough to be able to distinguish it from bad ...


13

There are 3 main types of night vision equipment; Image intensification This is the type most commonly used by the military. It works by effectively amplifying the available light and may work in visible or IR spectrum or both and works in a similar way to a TV camera. These systems rely on some light e.g. from stars or moon being available and won't work ...


12

There are differing schools of thought on this: Rolling/folding is a lot easier to manage in my opinion, easier to keep track of all the pieces, and when camping in dirty/snowy/wet environments makes it easier to keep the ground side of the tent together and the clean(ish) parts away from it. Stuffing results in fewer creases in the fabric over extended ...


12

Start small and simple. The important thing is to get back into the habit of walking long distances and times again. You probably haven't walked a mile in a while. For starters, walk around your neighborhood. Walk to the store. Walk to the movies. Walk to the bar (and stumble home again). Google maps provides walking times, distance and directions.; ...


12

For a guided glacier tour: No reason - go ahead and use it. I would not worry about resharpening, as from your description there are no steep ice sections on the route. If there are and you like using your own hands, start filing. The quick option is to keep the geometry and just sharpen everything. The longer one is to reshape the tip so it looks more like ...


12

My wife & I are both in our mid-50's, and we stopped going car camping a few years ago largely because of the lack of sleep and difficulty getting into and out of our tent. Our last trip we were so tired that I was hallucinating on the drive back home & we had to pull over on a mountain road to take a nap before we carried on. Even the nice ...


12

You wouldn't want to use one to climb. My favourite quote I found on the Internet: Here's my advice on climbing with grappling hooks: don't climb with grappling hooks. Real climbers never use them, and for good reason. You have no idea what they hook onto, so you are trusting your life with something completely unknown. Those things are just for the ...


12

I happen to know for a fact that the steel ring in those anchor set ups is rated to 50kN. That's as much as both hangers combined, they're only rated to 25kN each, which is still double the force any human body will ever be able to produce. The human body is rated to fail somewhere around 12kN which is the amount of force a 1,200kg (2645.5lbs) object would ...


12

In general, a black silicon mask will block out a little more light from close to your face. But for me, the effect is unnoticed unless I specifically look for it. Frame colors have never made any noticeable changes to the colors I'm seeing. I had a "low volume" mask that was to close to my face that pressed against my forehead and gave me a headache ...


12

Upsides It "looks cool" (to some) Cordage (but arguably useless as you have noted) Downsides Poor grip (compared to leather and manufactured alternatives) More likely to cause blisters Less durable, requires more maintenance PITA to clean if it gets messy/dirty/sweaty Once you unwrap the cord to use it, your knife has even worse grip. IMO - It's a ...


11

The single most important consideration for your parents is going to be their comfort. For starters they must have something comfortable to sleep on or they're going to spend every day achy and tired, wishing they were sleeping in their own beds. The older you get, the more precious sleep is. If they can't get a good, comfortable night's sleep, then they ...


11

In climbing, there isn't a good use. However, in canyoneering a variant of the grappling hook is occasionally used to escape from potholes. It is called an octopus. You make one by attaching several aid climbing hooks like the BD talon to a potshot (a little cloth bag usually filled with sand). See this book for a picture. I have personally used them and I ...


11

Grappling hooks are sometimes used in the arborist (tree climbing) world. Rather than being thrown upwards, they are attached to a line in order to retrieve the other end of the line. Here is a picture of the relevant maneuver: https://www.flickr.com/photos/naturejournal/3391768573/in/album-72157616026109442/lightbox/ The hooks on the end are often curved ...



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