71–80 of 168 posts
Earlier quoted context omitted.
You can already bring scissors on a plane with 4 inch blades. That's two knives.
Can you? I've had to leave my scissors at security at least once. It was in France though
https://www.tsa.gov/travel/security-screening/whatcanibring/...
> If packed in carry-on, they must be less than 4 inches from the pivot point
this reminds me of "圧倒的不審者の極み!" or "kiwami japan" youtube channel. I also wonder if this channel was the inspiration for "howtobasic"
They probably should have consulted that guy. He has made quite a few wooden and cardboard knives that are significantly sharper that what was shown.
Earlier quoted context omitted.
Getting knives past airport security seems not particularly difficult from the experience of my circle and other anecdotal sources. I've had friends and family accidentally get knives through security on many occasions, and I have also accidentally done it myself. To my knowledge none of them has ever been caught in the converse situation and had to give up a knife. I imagine if one were resourceful and deliberate ab…
This would be great for ML. A knife detection algorithm that alerts the officer when it thinks it spots one when the bags go in the scanner.
The video of them cutting the steak with the wooden knife shows extremely poor performance. The steak was torn apart more so than sliced. There is no way the knife in the video is “three times sharper” than a typical stainless steel kitchen knife as claimed.
This is awesome especially since I make wooden knives! Specifically out of sugar maple, since they’re nice and hard. I make them to look like steak knives as a joke, but they work great on cheese, butter, and steamed vegetables. If you ever want to get into woodworking you can pick up a bandsaw for a couple hundred bucks and they’re a great first project.
Do you have a picture of that? Curious to see how it looks like.
Nowadays they look most like the ones on the right but are better refined and are serrated. The two left are pine (smells great but are soft), and the two right are maple.
When I was a kid I used to launch Estes rockets. They came with mostly balsa wood fins that would frequently break on landing. The balsa wood also absorbed paint unless you hit it with a clear coat first. This for some reason gave me the idea of rubbing Elmer's glue on to it, letting it dry, then sanding it and then painting it. Not only did it paint easily but I never lost a single fin again. The closest I came to t…
Lovely idea. I would like to see a comparison of the energy requirement for hardening wood this way vs. making steel. Would give a better sense of whether this is a technology worth pursuing as one path toward decarbonising the future.
I'd like to see specific comparisons in physical properties versus steel and specifically which steel they are comparing to. Including in physical dimensions since their nail seems fairly thick. Steel is, as I understand it, hundreds of different variants each with their own physical properties. For example, they say 23 times harder in the article than regular wood. Wood has a Brinell scale of up to 7 although most i…
For what they were showing, if you were going for "equivalent to steel", I'd expect to see a tap to secure the nail and then probably only two strokes to sink it. They tap it a hundred times, which begs the question of what would happen if you actually hit it.
Strength comes in many dimensions.
Lovely idea. I would like to see a comparison of the energy requirement for hardening wood this way vs. making steel. Would give a better sense of whether this is a technology worth pursuing as one path toward decarbonising the future.
Even if it were to take more energy it might still be a win since it would effectively lock up the carbon in a (basically) non-decomposing form. You’d have to look at the net emissions taking into account the amount of carbon dioxide that would have been released as that piece of wood decomposed (or you can look at it from the perspective of the CO2 removed from the atmosphere by that wood).
Death (decomposition) is a critical part of the circle of life...
> "Surprisingly, our wooden knife is actually three times sharper than the typical stainless steel dinner table knife,"
The typical stainless steel dinner table knife is slightly serrated, which means it doesn't need to be sharp to work well. Being sharper than something that doesn't need to be sharp to function properly is a very dumb comparison.
Sharpness also has no relation to durability except possibly in the inverse. A typical steel dinner table knife will keep doing its job for decades and thousands of wash cycles without any maintenance. Meanwhile there's a great youtube channel where a guy makes razor sharp chef's knives out of random fragile materials like jello.