Bro, you're a natural born engineer ngl. I'm a physicist myself so I like to think I'm qualified to say so. I love the humility and you knowing the limits of your own knowledge but you're approach to these tests is really scientific and methodical. Plus you actively seek out corrections and new info.
Watching this video, and most of the content here, gives me flashbacks to statics and strength of materials classes when I was in college. One thing I would say is impacting this particular test is the one leg of the A-frame is able to compress the soil, while the other can't. This is probably a minor issue but the soil does have some springy-ness to it. The result would be pulling the slack line and the anchor line out of plane with each other, this adding another set of angles.
When you pull a load at an angle, you “vector” the load. If you attach 2 fixings side by side underneath a horizontal surface (ceiling, roof, bridge etc), then attach a rope to both, then suspend a 100kg load in the middle so each side takes half the load, you put a 50kg load on each fixing. As you move the fixings apart you vector the load (still 100kg) so the load on each fixing increases. So if the angle between the rope (where the 100kg load is suspended) is 30degrees the load on each fixing increases to 53kg. At 60degrees the load is 58kg. At 90degrees the load is 70kg on each fixing. At 120degrees the load is 100kg on each fixing. At 175degrees the load has increased to around 11,000kg on each fixings. This is the job of a ‘rigger’ who has to pass a qualification to gain employment (and needs public liability insurance of at least $/£ 10,000000) as the forces involved can be enough to damage/break structural steel, buildings, etc. Hope this helps
Great video, what all people setting bolts and re belays etc etc need to know. Don't forget the importance of geometry/physics/even a bit of geology won't go astray, oh yeah also people setting up slack lines, tyrolean traverses etc.
I think you misunderstood the relevant angles at play here. Imagine drawing a line through the ring perpendicular to the frame, the angles of the rope with respect to that line are the important part. The angles between the floor and the rope are related to that, but they depend on how the hang frame is positioned. That's what you see when moving the frames around. It was really nice seeing all that demonstrated, thanks for the video!
Philipp, you are correct that the angle of the ropes to the ground is not relevant. But to be completely accurate it's not the angle of the frame but the angle of the of the frame ropes that is the most relevant. These are slightly different angles when he pushes on the frame. When he's not pushing on the frame (and everything is static), then they will be the same. So using the frame angle would be good as long as you didn't have other ropes tied to the frame that could pull on it. What I think is the simplest way to look at it is to consider two angles: 1) the angle between the "highline" and the frame line* and 2) the angle between the anchor line and the frame line*. If these two angles are the same, then the tension in the highline and the anchor line will be the same. If the angles are different, then the side with the larger angle will have more tension. * Use the average angle of the frame lines, or the frame angle subject to the conditions mentioned above.
@@andrewsnow7386 There are component forces in 3 dimensions is basically what you are saying. You have the component forces in the horizontal planes and the vertical plane as well as the up-down plane. Changing the angle of the frame changes the loading in the up-down plane and will affect the other two plane component forces.
The ring doesn't move, But the frame does as well as the rope. which is pulling up and changing the vectors, by adjusting the axis it is the same as changing the angel of the rope to the ground
In physics and statics this is called "vector resolution" here is a simulation i found that quickly gives you the magnitude and angle without doing the math by hand just drag and drop! Finally angles other than 45 deg will be obtainable! open the link, click on "explore 2d" its not perfect but its the best free app I have found. make sure to check the box that says "sum" and note that this sum is the resultant of the vector you add. if you want to find a vector that will "balance" the other two simply take your sum and add or subtract 180 deg. Hope this is useful! phet.colorado.edu/sims/html/vector-addition/latest/vector-addition_en.html ps love the videos! keep it up! From a rock climber and engineering student
You may have already done it but please can you do a video on the different kinds of sit starts as I'm still trying to learn them slacklining in the park but am just falling off loads
If you had the line run through a poly and then straight down to the anchor it would balance out the forces a lot more evenly and the angle that your A-frame is on would be less important If you look at any large swing bridge the cable runs continuously from each anchor And is able to move freely back-and-forth with the stretch of the cable Will never see a large swing bridge with the cable isolated at the equivalent of your A-frame I appreciate that your system doesn’t fully isolate it but it definitely impinges its ability to balance the load I am extremely dyslexic so apologies for spelling and grammar😊😂😊
Also the setup would put additional lateral load on your A frame if the line was able to run freely through the A-frame it would only be under compression and have no lateral load put in to it
Not related but on your dyneema soft shackles if you use a cow hitch instead of the noose without going through the line so with no pass through would it increase the breaking strength I use dyneema for overhead lifting I'm super curious but don't have a safe way to test hoping you could help or give advice love the channel 🖒
If you want to understand why pushing on the A frame changes the forces, measure the force you're putting on the A frame, it should all balance out! If you go beyond 45 degrees it should also lower the force if i'm understanding correctly. It's not intuitive that 45 degrees would be a worst case scenario.
Freeze thaw on bolts using liquid nitrogen? Static/electricity effect on webbing/bolts (use an old microwave transformer)? Somthing reckless with fire... Maybe simulate bolts from a burn area.
Check out our new store! hownot2.store/
I love the cat cameos. Just the cherry on top of the great experimentation/discussion.
3:10 27.7° (40 from bolt, 21 height)
4:58 34.1° (31 from bolt, 21 height)
7:35 45° (20 from bolt, 20 height), peaks: 3.55kN (webbing) / 5.54kN (frame to bolt), 156%
Bro, you're a natural born engineer ngl. I'm a physicist myself so I like to think I'm qualified to say so. I love the humility and you knowing the limits of your own knowledge but you're approach to these tests is really scientific and methodical. Plus you actively seek out corrections and new info.
HowNOTtohave to mow your lawn.
Watching this video, and most of the content here, gives me flashbacks to statics and strength of materials classes when I was in college. One thing I would say is impacting this particular test is the one leg of the A-frame is able to compress the soil, while the other can't. This is probably a minor issue but the soil does have some springy-ness to it. The result would be pulling the slack line and the anchor line out of plane with each other, this adding another set of angles.
Currently an engineering major, just finished the class and am totally geeking out on the math.
Pretty sure that factor is not particularly significant.
My favorite TH-cam channel
Thanks :)
When you pull a load at an angle, you “vector” the load. If you attach 2 fixings side by side underneath a horizontal surface (ceiling, roof, bridge etc), then attach a rope to both, then suspend a 100kg load in the middle so each side takes half the load, you put a 50kg load on each fixing. As you move the fixings apart you vector the load (still 100kg) so the load on each fixing increases. So if the angle between the rope (where the 100kg load is suspended) is 30degrees the load on each fixing increases to 53kg. At 60degrees the load is 58kg. At 90degrees the load is 70kg on each fixing. At 120degrees the load is 100kg on each fixing. At 175degrees the load has increased to around 11,000kg on each fixings. This is the job of a ‘rigger’ who has to pass a qualification to gain employment (and needs public liability insurance of at least $/£ 10,000000) as the forces involved can be enough to damage/break structural steel, buildings, etc. Hope this helps
Great video, what all people setting bolts and re belays etc etc need to know. Don't forget the importance of geometry/physics/even a bit of geology won't go astray, oh yeah also people setting up slack lines, tyrolean traverses etc.
I think you misunderstood the relevant angles at play here.
Imagine drawing a line through the ring perpendicular to the frame, the angles of the rope with respect to that line are the important part. The angles between the floor and the rope are related to that, but they depend on how the hang frame is positioned. That's what you see when moving the frames around.
It was really nice seeing all that demonstrated, thanks for the video!
Philipp, you are correct that the angle of the ropes to the ground is not relevant. But to be completely accurate it's not the angle of the frame but the angle of the of the frame ropes that is the most relevant. These are slightly different angles when he pushes on the frame. When he's not pushing on the frame (and everything is static), then they will be the same. So using the frame angle would be good as long as you didn't have other ropes tied to the frame that could pull on it.
What I think is the simplest way to look at it is to consider two angles: 1) the angle between the "highline" and the frame line* and 2) the angle between the anchor line and the frame line*. If these two angles are the same, then the tension in the highline and the anchor line will be the same. If the angles are different, then the side with the larger angle will have more tension.
* Use the average angle of the frame lines, or the frame angle subject to the conditions mentioned above.
@@andrewsnow7386 There are component forces in 3 dimensions is basically what you are saying. You have the component forces in the horizontal planes and the vertical plane as well as the up-down plane. Changing the angle of the frame changes the loading in the up-down plane and will affect the other two plane component forces.
testing different rock climbing anchor configurations would be interesting... for example: webolette vs cordalette, 2 and 3 point anchors. Cheers!
The ring doesn't move,
But the frame does as well as the rope.
which is pulling up and changing the vectors, by adjusting the axis it is the same as changing the angel of the rope to the ground
Can you run some tests on how much weaker is the sandstone when wet? Great channel 👍👍👍
C'mon! With the cat right there, how did you not "On this episode of How NOT to feLINE."
In physics and statics this is called "vector resolution" here is a simulation i found that quickly gives you the magnitude and angle without doing the math by hand just drag and drop! Finally angles other than 45 deg will be obtainable! open the link, click on "explore 2d" its not perfect but its the best free app I have found. make sure to check the box that says "sum" and note that this sum is the resultant of the vector you add. if you want to find a vector that will "balance" the other two simply take your sum and add or subtract 180 deg. Hope this is useful! phet.colorado.edu/sims/html/vector-addition/latest/vector-addition_en.html ps love the videos! keep it up! From a rock climber and engineering student
Hahah, go figure CU's Physics page comes up.
I wonder how many more videos until we're referring Ryan to LearnChemE.com 🤣
#skoBuffs
You may have already done it but please can you do a video on the different kinds of sit starts as I'm still trying to learn them slacklining in the park but am just falling off loads
If you had the line run through a poly and then straight down to the anchor it would balance out the forces a lot more evenly and the angle that your A-frame is on would be less important
If you look at any large swing bridge the cable runs continuously from each anchor And is able to move freely back-and-forth with the stretch of the cable
Will never see a large swing bridge with the cable isolated at the equivalent of your A-frame
I appreciate that your system doesn’t fully isolate it but it definitely impinges its ability to balance the load
I am extremely dyslexic so apologies for spelling and grammar😊😂😊
Also the setup would put additional lateral load on your A frame if the line was able to run freely through the A-frame it would only be under compression and have no lateral load put in to it
What loads are the ropes on the HangFrames seeing?
Not related but on your dyneema soft shackles if you use a cow hitch instead of the noose without going through the line so with no pass through would it increase the breaking strength I use dyneema for overhead lifting I'm super curious but don't have a safe way to test hoping you could help or give advice love the channel 🖒
Triangles never lie, unlike parents squares and um 'other' polygons.
love these video's. I'll try your coffee soon!
If you want to understand why pushing on the A frame changes the forces, measure the force you're putting on the A frame, it should all balance out! If you go beyond 45 degrees it should also lower the force if i'm understanding correctly. It's not intuitive that 45 degrees would be a worst case scenario.
As long as the A-frame is symetrical with the angels of the two ropes the force is the same. So no maths involed.
Yeah I was thinking the same
t shirt idea: "nerdy stuff like this"
Do you ever use big shot from tree workers to get across the gorge
Forces are vectors... You need to take into consideration the vertical and horizontal components of the forces...
Wow 🤩
Freeze thaw on bolts using liquid nitrogen? Static/electricity effect on webbing/bolts (use an old microwave transformer)? Somthing reckless with fire... Maybe simulate bolts from a burn area.
Lapel. Microphone.