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Could you the same for alcohol stoves? I'd love to know which stove uses the least amount of fuel to heat water.

Interesting, I'd always heard the 5-1 number quoted but never really thought it was supposed to be taken literally, so I'm actually a little surprised it was true even if only at high speeds. Disappointed to see no one test climbing or elevation gain though, I'd guess that a significant part of the increased effect at higher speeds comes from actually lifting your feet during running strides, rather than just swinging your leg forward, which would also apply to simply walking uphill.

Another great video, I appreciate all the work. I think the MSR heat exchanger ring is more aimed at liquid fuelled stoves like the whisper light or dragonfly with their wider flames. I would love to see a canister stove with a wider flame compared as well such as the Optimus Crux. Perhaps they benefit from a heat exchanger more than a narrower flame. Of course the HE pot can’t be too small or the flame may hit the wrong part of the HE. The cooling effects of wind on the pot will also be compounded by any decrease in temperature. I think that consideration is also easy to forget when we are laser focused on efficiency in static temperature wind comparisons. Tiny variables affect performance, sure but they are insignificant compared to real world variables. I work 4 seasons in the wilderness and often make a coffee, porridge or soup on a cold day. I dislike the waste of canister stoves and so rarely use them but I have often thought there are many weaknesses people forget, especially in cold weather. Larger fuel tanks have more fuel mass when new and so if kept warm take longer to lose their heat and fuel pressure. Unfortunately they also remain as a “partial” canister longer. To make sure I always have fuel I would carry two canisters so I could run one completely empty before using the next. On a camping trip it’s easy to measure and pay close attention but not so much when its part of a work kit. That’s obviously more practical with smaller sized canisters.

An amazing contribution. I would appreciate additional suggestions, pairings for those who don't have your bandwidth.

Lighter isn’t always better when you are going to use a stove many times. In something already so lightweight, setup and takedown time as well as durability are huge factors.

My two college chemistry for science majors classes and labs were very useful. One of those labs included a demonstration of food calorie measurement. I learned that the method for determining calories in food is not the same as our bodies use food. Our bodies turn food to energy and nutrients in water based chemical reactions. Calorie measurements for food literally burn food in air to heat water (tends to favor fats/oils). I realized this massive disconnect many years ago. To my knowledge there is no real research into how human bodies actually use food (water based chemical reactions under 100F) versus how the food industry guesses at how food works (open air combustion). This oversimplification of food energy value ignores nutrition (fats are required for brain function).

I wish I could give this two thumbs up. I appreciate the thought you put into the test to eliminate as many variables as possible. Thank you!

Planning my first thru-hike of the Tahoe Rim Trail next summer, and this video is incredible!!! I downloaded the pdf of the spreadsheet, and it will be my go-to reference for life. Thanks so much for your contribution to the backpacking community :)

GearSkeptic taught me everything I know

Great info once again, you’re a wealth of information. Thanks! I can’t help but giggle when I see your videos, your moving hands remind me of a muppet back in the day, but I can’t remember the muppets name.

What a great resource you are, thanks so much. It’s made me rethink doing any thru hike. I’m gluten free, have a walnut tree nut allergy and egg allergy. Unfortunately, I’ve done so much food shopping to read all the labels of bars, I couldn’t find one that didn’t process tree nuts, so bars are out. A lot of candies are out, a lot of chocolate is out because of processing tree nuts in the factories. I’m still looking for a tree nut free chocolate. If only the FDA could redefine their nut allergies to what nuts instead of peanuts or tree nuts.. what tree nut? When I email the companies to ask if they process walnuts, I get a copied and pasted typical FDA write up about “ may contain”, instead of answering my question. So frustrating! I can’t buy any of those products because they’re not specific. But I read somewhere that all tree nuts are processed in the same facilities before being shipped to companies. But I did find a company that only processes cashews, so I buy from them. I can have peanut butter but not eat peanuts because of cross contamination, weird I know. I figure I could make my own trail mix of sunflower seeds, pumpkin seeds, cashews, and dehydrated peaches, apricots, and cranberries with gluten free pretzels, dried coconut and a tree nut free chocolate. I figure that I would buy a dehydrator and when I cook meals, make a lot extra and dehydrate the meals, and add instructions to each meal, and freeze. Dehydrate vegetables and fruit also. I think I will have a huge issue with my caloric intake.

Hey man, great video! I subbed a long time ago but I obviously need to watch more of your channel.

Thank you so much. This is a real treasure for the hiker world!

So to get %100 perfect safety you can simply filter with an MSR Guardian and then boil the water. Overkill to reach boiling temperature, but at any rate, this would mean %100 safety right?

Great channel. Unsolicited ask: Oxygen transfer rate (OTR) on name brand odor barrier bags! Aside from the empirical testing, also a dog sniff review at a local dog park or similar?

Love the experimental design here.

17:51 Busted 😉

⁠​Another thought is that if you have a lid on your stove, then the only way to know that it’s done boiling is the steam coming out of the holes of the lid, besides checking it periodically. That means it is boiling longer than the 200 degrees in your test, which strengthens your argument that a lid isn’t worth it. Especially if your pot is much larger than the water volume, as I found out this weekend with my own test with a 1.4 liter pot and two cups of water.

Thanks so much for doing all that research for us. 😅

This interested me way more than it should have. Thanks!

I could watch your videos all day. In fact, I have!

Great video. One question is how windy does it get on the other side of the tent, or in a partially opened vestibule? In other words, what is the highest realistic wind speed that is encountered while backpacking?

you got yourself another subscriber, the level of detail and precision is very appreciated and i learned a ton from this video.

It doesn't get any better!

Thank you so much, for your work!!!

Wow, thank you so much for this very informative series! Got a quick question, if I opted for the Frog Fuel instead of the Whey, would I still have to mix it with the dextrose and sweetened coffee? Like does Frog Fuel stand on its own and accomplish the same results as your mix? Next question, using your recovery drink recipe, how much water do you add? I hope you have a quick minute to answer my questions. Thank you so much, I really enjoy your videos.

I recently just about deleted myself on what was supposed to be a real Sunday stroll of a hike. Here's the story as a warning to others. It was my first hike of the season, near home, recovering from a hideous oral surgery. And these are just little mountains, I thought. The *trail reports* I read were for the peak of Mountain X and some nearby high points with antenna masts. My *map* said "here are the antennas, and here's the peak of Mountain X." Clear enough. I was just doing maybe an hour run with a quick side mission to Mt X tacked on for laughs. I made it to the antennas with plenty left in the tank, why not "bag a peak?" Turns out that what almost everyone, including the trail reports, calls the peak of Mt X was off to the East, at the end of a paved road, with a parking lot, an easy walk from the antennas. What my map labeled as the peak of Mt X was in fact the high point of the whole ridge, the Mt X massif as it were, and it was off to the west over a long, rugged, rotten trail. Locals, park rangers, and everyone but my map called this point by a different name, let's say "Mountain Not-X." I realized something was off in plenty of time to turn around, but then I did several dumbs: I went for it anyway; it was a heat advisory day, so it was ok in the morning but then became an oven; and because it was just a cardio run plus cakewalk, I hadn't brought water. Later, on the Not-X peak (just some scrubby woods with a survey marker) I texted my wife with another error: the way back would be easier because it's downhill! Wrong! It's not the Rockies! It's all up and down and steep as hell, endlessly! Uphill both ways! Good lord, the walk out was maybe the most miserable I've ever been. I'm lucky I didn't keel over within earshot of city traffic. Nobody else was up there. I'm too old to be this dumb. Anyway I came out a little ways from where I parked, sat down on a curb, and waited for my wife to bring water. My house is like five minutes from there. 🤷🏼‍♂️

Nuts! Studying the spreadsheet, I'm astonished at the kcal and protein density of pumpkin seeds. An ounce can get you 200+ kcal and double digit grams of protein, a combination that I don't think any other nut/seed can touch. I had no idea. Then I couldn't help noticing that contrary to my previous understanding, candied pecans were less kcal dense than plain, which proceeds straight from your general point about sugars being way less "pure energy" than fats. Just a really neat thing you've put together.

great video

Thank you for this amazing and entertaining resource!

This is incredible. Thank you.

Hammer Brand Recoverite!

It’s a perfect channel. Since behind, attention to details, understanding our needs, providing data and ideas to think about instead of saying what we need to do, sense of humor. It’s simply awesome!

Can you do a review on the latest scientific evidence regarding the safety of aluminum vs titatium vs stainless steel pots? With a throw in bit abt the dangers of teflon? Thank you very much.

Please keep making videos. These are amazing quality and very informative. Thank you for the work you do to make these

Can you also look into sun umbrellas? I can't find much study on the shiny metallic ones vs multi layer vs rain umbrella vs light colored vs dark colored. It's all hearsay from people who are selling or already bought one 🤷‍♀️

I already knew about the 125cal./1oz rule, so I almost passed up your video. I’m glad I didn’t. Thanks for the video. But most importantly thanks for the time that it took to put it all together. As time is the most valuable asset we have as human beings. Take care 👍🏽

Thank you for a great video, sir! Very rare to see this level of scientific argumentation and references. However, without having any published studies to reference, I can with almost absolute certainty tell you that you are mistaken about the mold part of the video. As a quick bagground info, I work as head of R&D for an undisclosed but pretty big brand producing, amongst other things, sleeping pads of all sorts. As part of my responsibilities, I communicate with our claims and costumer support department, as well as our production facilities and R&D engineers, so I see all of the not so sexy behind the scenes details of the outdoor gear industry. Sleeping pads (such as the Thermarest ones in the referenced videos) will most often be made from TPU laminated nylon as well as having inner layers of clear TPU film for structure and compartmentalization. What people forget to mention is, that the expensive top-level sleeping pads are often using antimicrobial film or treatments in their pads (which is part of the reason they are so darn expensive). Naturally, a super expensive top-level pad with antimicrobial materials/treatments, will (often, not always though) be free of mold growth. However, when you investigate pads from a price point a bit below Thermarests top pads, you find that one of the reasons for a cheaper price, is also cheaper materials/lack of treatments. Without disclosing models or brands, I can tell you that even some of the markets kinda cheaper but otherwise very well performing pads in parameters such as R-values, weight, great comfort etc., will have mold growth inside them - but only on pads made of outer fabrics of bright colors and low linear density fibers (Denier) will the dark mold growths be visible. For some models, as many as >5% of items solds will result in claims by customers for excessive mold growth. Some sleeping pads will (despite using pumpbags, electric pumps or similar to inflate) be absolutely riddled with dark mold growths within just a few usages - if of course the conditions are "right" (/wrong). If you want, I can in a private communication provide you with photographic evidence and more specific details? Thanks again, you have gotten a new subscriber!

because you are doing that in warm garage. thays why "no benefits" from lid

Gram wheenies!!! Not counters.... :)

There's a great deal of science that shows copper is essential to human health. Removing it all isn't mission-critical. Obviously, copper kills all viruses and bacteria, so it has been extremely important in water treatment for millennia.

Fantastic! Thank you!

Im thinking ghee, parmigiano reggiano cheese, nutritional yeast, fortified date squares with berries and other nutrients added, homemade electrolyte and fruit juice gummies made with gelatin, beef jerky or pemican, algae tablets or dried seaweed, a variety of teas and instant coffee, powdered milk tablets if they exist, and raw honey. I would also add a variety of dried fruits and berries for the nutrient variety and fiber content, and maybe some greens powder for the micronutrients. One thing people forget to factor in is insoluble fibre that aids digestion despite not having nutritional value. Things like oat bran assuming you have enough calcium to balance the phosphate would help for avoiding constipation allot, one of the most overlooked and major problems.

You said “mind your munchies “ 😂😂😂😅 I’m dead! 😅

Your voice kind of reminds me of the man who used to narrate unsolved mystery’s lol

Outstanding information

That's how you make an excellent and complete informative video. Loved the scientific approach

Canadian Army used inflated pads, the carry case doubled as an inflation bag. Found in extreme cold some who blew it up by mouth could not deflate in the morning because the valve froze. Figured some saliva would get in there also as they blew.

doing the Lord's work lol, well done. pretty sure RUclips sent me here after watching a video where a guy used a Soto Amicus and went through 2 canisters and into a 3rd while his partner was still on their first canister using a Jetboil Minimo. These setups really seem to shine over long-haul scenarios where the efficiency really pays off. Anyway, thanks for sharing!