Hello everyone, I hope you enjoyed the brilliant thought process behind Da Vinci's self-supporting bridge. I’d be grateful if you could support my channel today at www.patreon.com/Sabins. Your support is crucial to making our educational services sustainable. Wishing you a happy Diwali! Thanks Sabin Mathew
Hello Sabin, I love your channel and what you share. I'm a working Timber Wright and have built several of these types of bridges over the years. I've never been sure why they get called a "Da Vinci" bridge since the Chinese Scholar Lu Ban (魯班) was the first I've known of to employ a "stitch bridge" almost a thousand years before Da Vinci even lived. Some to these did span further and at a lower angle. Though made of stone, the Anji Bridge (安濟橋;) during construction employed these very same timber joinery systems and understanding, and still centuries before Da Vinci...Thanks again for what you and your team share and do with your videos...
@@AlbertaGeek What are you trying to say, that Da Vinci stole that idea for a bridge from Chinese? Even if there was such a thing in China that was unknown in Europe, so Da Vinci invented it (again).
@@ozymandiasultor9480 I would not say "stole", but more than silk travelled along the silk road. Knowledge travels, too you know. Could he have "invented" it independently? Sure, why not? After all, I did so myself, as a Cub Scout during the early 70s, going for my 'Building' badge. It was a popsicle stick bridge that I deduced from that popsicle stick construction that would explode when you flung it at something (or someone). Pardon my nostalgia.
Ohh no, it's a stable and rugged bridge. Our simple pencil bridge was able to carry more than 1 k.g of weight. The bridge had no problem, irrespective of the point or angle of load application. One thing is clear. This bridge will never fail because of the joint issue. More the force you apply the stronger the joints become. Yah, of couse if any of the members of this bridge fails, the entire bridge will collapse at once.
Not DaVinci, Chinese used this type of bridges way earlier, Xianju bridge (仙居桥) is good example it was build 1452 year when DaVinci was born. Its covered woven timber arch bridge.
It is his invention, first this is done in a different method, second how the fuck would a person in Italy know what is going on in China, dude literally invented this on his own.
The Chinese built a bridge - using the same general idea of interlocking timbers - about 300 years before DaVinci was born. It was called the Rainbow bridge and it is an equally fascinating early engineering feat.
0:12 incorrect. There is a threshold of weight at which the structure cannot longer support. It is not possible to put infinite weight on the structure. There is a point at which the weight will not only weaken, it will deconstruct the structure.
Actually the construction is one of the methods to build an arch. Stress of materials can be loaded in a) compression, b) tension, c) shear. Stone and other materials are usually strong against compression, and less strong against tension and shear. Half circle ach is designed in a way that materials are compressed, which make the construction very stable. The Leonardo self supporting bridge is excellent construction when building a stable bridge with least materials. Another method would require huge amount of woods, but we can also build classic arch out of woods, in which woods are just compressed. The construction would then far more stronger than Leonardo self supporting bridge, while it is also self supporting. (We cannot build stable circle, though.)
@Nobody-iy6tm "no actually"... You completely ignored my comment just to make some weird statements for yourself. Clearly this structure cannot hold infinite weight. That's pure and simple fact not matter how you want to talk around it. Objectively, the structure has a threshold at which it can no longer support.
Although da Vinci is often given credit for this, the Chinese Emperors were building bridges like this a good period prior; some of it had to do with seasonal flooding problems that often took out small to medium sized bridges- the Emperor kept an inventory of these parts, these logs, and shipped them to where ever they were needed. First they were erected , then spanned, followed by a more reasonably sloped on side and off side to anchor it and make it usable.
Different styles of bridges, also he did invent it by himself, how would he know that the Chinese were building anything similar? This is the ancient world not modern times where a quick Google search would show him the plans lol.
@@jelly.212 Who's to say China invented it. They could've also just heard about it from travelling traders and just gave it a much broader application. Weird how that works huh.
Thanks for publicising the forgotten design idea. I had never head of it before. With perfectly strait structurally components. The arch of the bridge is defined by the relations of the length and diameter of the of span components to diameter of the cross components. This understanding leads to several option to lengthen the span without scaling the components proportionally . Option 1 make the cross pieces thinner, possibly by notching them or using small diameter ones. The components are in compression and do not need to span such long distance so can be smaller anyway. Option 2 reduce the diameter or the span components where the meet the cross braces again using a notch or different material. Using notches will increase the friction and make the bridge more robust against a piece coming lose. Option 3 use curved span components. Components that curve in the opposite direction to the arch by some fraction. This happens in the video when the bridge flex under load, but this could an engineered choice. Are there any more options?
As an assistant professor teaching engineering students, I love sharing your videos with my class and discussing them together. I can hardly describe the excitement it brings to the students!
on the last drawing, you could place two parallel arc bridges on the same direction as the river flow, and then place another 3 arc bridges connecting these 2 arcs and the shores.
I have known about this bridge for some time and have experimented with various iterations of it. Everyone looks upon it as an arch bridge and for that it is brilliant. One thing I tried, is to build it upside down i.e. an inverted arch. As an inverted arch it can be rocked on the arch provided that each end is kept loaded toward the ground. To a limited extent it can be used to lower a load over a gap. As a form of crane Extending it is easy and can be done very quickly as the outer end is held in place by gravity so no need to support. Limited by the strength of the first beams as the load on them increase exponentially if pivoted at or close to the end
I work at a local brewery and we have a footbridge in the outdoor area. It is engineered in this manner and I marvel at it all the time. It does have fasteners and is solid, but same design.
This type of simple practical thing are generally like this. Many other people also invented this but the one who introduce it better to rest of the world gets the credit Such as Pythagorean theorem Zero
@@ballsmasher3000 everyone knows that India invented Zero now. Maybe the ancient people thought Arabs invented it. But everyone knows now that India is the original inventor.
This is fascinating!✨ Exploring the genius behind its design is such a treat-his ability to merge functionality and beauty is unmatched. Thanks for taking us on this magical journey through history! 🔍🎨
2:46 All the weight you apply will be transferred onto the density of the red pencils. They can also not be pulled outwards due to being inside a triangle; as soon as any one is removed it comes apart.* Securitisation changes, in the office model the top piece is not in a triangle and spreads out the structure making a wider curve; also a lower bridge. Remember those basic shapes, 2D is Hexagon. good vid!
It is a really good experiment, but the issue is if you are using different pencils for the experiment (not sizes) shapes, like circular shaped pencils will easily slip, etc. But note it will be hard to make with pencils only and if it is not working and the result is not a bridge it must be because of the versatility of the pencils and the bridge. You can add toothpicks to strengthen your bridge but eventually, the pencils are ok my model could hold up to around 4 kgs just with the pencils but that's not too much weight, if you want to make your model really strong you can strengthen the green pieces by choosing strong wood or strong pencils mentioned in (1:02) part of the video, there is a disadvantage in the bailey bridge too, Even though it is temporary and it is costs less. The metal is mostly copper. Copper can easily rust and eventually, cracks are spotted so the bridge collapses if weight is kept onto after excessive usage. So Bailey bridges have an advantage and disadvantages😄! Mr. Sabin, this is a really informative video and I liked your animation and construction module. Thanks for the experiment once again!!! Thanks Everyone!
That is such a beautiful looking structure. This bridge would make a beautiful entrance way or gate to a ranch, large property, or mansion. I picture huge oiled or stained, hand cut wood beams. Being only for looks and not structural, they should be fastened together using large wooden dowels for safety.
I know a compromise solution to the last problem: suppose the issue is the weight the bridge would have to carry. We can put bars nailed together over the entire river that can carry at least one person at a time. The person goes on the unsupported Bars until it's about the middle of the River, then the person has to ram a support tower into the riverbed, from the upside of the bridge. Now you can bed two Da Vinci bridges onto the support in the middle of the river. Use strings to support the horizontal bars. How exactly you get the support into the middle of the River is of less importance, you could use a boat aswell, once it's there you can save on many supports by using two or more Da Vinci bridges.
I think if we least use more heavy weight products like concrete or iron type with geometry shape might work as the water flow will not be able to cause that much pressure on it when flow increases.
To be honest you're idea was good, all we need to do is to keep that in place by adding something to each joint or to the whole structure, to prevent it from being pushed by the current cover it in a net like cover to let the water pass through but keep the thing intact.
Very interesting. This could be used for a number of interesting applications honestly. The only way I can see it used in it's bridge form to lengthen it besides using it in those manners would be to try to interlock them using maybe two half circles. I would have to test on smaller scale. It seems it has a lot of potential outside of bridge use though. For example, it seems it would be advantageous in survival scenarios to know how to create this bridge, or use cordage to create a full circle, turn it sideways, maybe stack a couple. It could give you a cylindrical shelter. There's a lot of potential with it. 😊
Amazing da vinci idea but instead of wood try some low weight but strong material and circular wheels that float and join all floating circles with rope and make a plank over that for a temporary floating but rigid bridge, excellent demonstration video, you tube needs such video to show potential of video demonstration of powerful ideas easily, if alive today, Leanardo davinci would have used RUclips very well to improvise his ideas
I apologize i couldn't get through all the comments. Have you tried building as a 4way or continuing off of the top 3rd. Like a locking partial in between the 2 sets. Or tension line from middle of crest to inner leg of a posing structure
So cool, I'm getting some sticks so I can show my children! It's a shame that a failure of part is a failure of the whole, no redundancy, but the ingenuity is off the charts.
I think the main interest from practical point is how to use them as scaffold, for building a stone arc or other structures. In that case, using ropes is not a bad idea, as both ropes and wooden bars are lightweight and can be assembled quickly.
It seem like it's strength requires the bridge to expand outward evenly as weight is place on it. Did you try the bridge out in the elements to make sure it could slide evenly across the dirt of a river bank?
Set the supports on piles that rise out of the water. I think the Romans actually used this type of bridge on campaigns but they built a proper top deck.
What happens if you apply pressure in the opposite direction, from the inside of the curve, rather than the outside? Does it still hold? If so, could you add a flipped segment when the fridge starts curving down, to have it curve back up?
They used planks to make that show bridge. If they turned those pieces of wood 90 degrees so they are on their edges the bridge would be even stronger. It's why logs are so strong. They don't have a bad side to have pressure on.
would placing the submerged bridges in your last animation parallel to the flow of the river instead of perpendicular and then placing the planks over them help?
East Asia was using this technique for hundreds of years before Davinci. People think he invented the ideas he illustrated, completely unaware that he was reading about them in a library.
What is the longest Da Vinci's Self Supporting Bridge you've heard of? Grok The most famous version of Leonardo da Vinci's self-supporting bridge is the proposal he made in 1502 to Sultan Bayezid II of Constantinople (present-day Istanbul) to span the Golden Horn. This bridge was designed to be 240 meters long and 24 meters wide, which would have made it the longest bridge in the world if it had been built. It is also worth mentioning that a modern version of this design, called the Vebjørn Sand da Vinci Project, was built in Norway over the E18 highway in Ås, in 2001. This bridge is 109 meters long with a main span of 40 meters, making it a of the longest built according to Da Vinci's design principles.
5:47 Perhaps if you could reverse the direction it arcs in? Or if instead of the two bridges in this example being stationed submerged in water you could have one foot of both bridges be on land while the other two feet are pressed together in the air so as not to fall? This latter option is impractical though even if possible.
They should use this on the parts of the Appalachian trail where small bridges were destroyed. This wouldn’t do much for cars and bikes, but it would be great for hikers on the trail.
great story, but could you explain how the bailey bridge keeps it's form? without sagging etc? also a good bridge history would be great part 2 to this!
We can use key and slot profile at the joining sections of two members to avoid slippage during high water flow but I see another that at the virtical deflection of the structure can't be determined in case of continuous varying load and the structure might get collapsed due to uneven loading at different points. Pls correct me if assumed incorrectly.😊
So... to actually use this incredible, no nails, no fastenings bridge, all you have to do is fasten all the parts together with rope first. Or make a different bridge first to get to the other side so you can use this bridge. Wow, what an amazing invention.
The solution lies in twisting the bridge to cancel out the curvature. The minimal self-supporting & self-locking structure is the PENTAHELIX, that is a lateral frame expansion of the Tetrahelix
Nice. Are they used to cross small rivers and creeks? They would be very useful in remote areas where rivers and creeks flood and become impassable. Why take the rope ties off?
🤔 let me know please , is that compulsory Having Same length and width and height sticks for the bridge or can we make this with different size sticks ?
5:38 I think to elongate the bridge is to rope together a pair of wood into a wide v shape and replace that as the supporting sides of the bridge. potentially even flattening the bridge into a self supporting ladder-like appearance. look at how curved the pieces are at 1:54 and you can see the what I'm talking about
This bridge model good for trap purpose. 5:43 If want to make it more steady maybe chain each poles of each junctions to make sure no pole edge or a log removed by accident.
Is it possible to use two bridges in an inverted maner like a 's' Or snake like structure with a log passing through the centre of this structure. I guess that might help in wider range scenario
The problem with this design is that there are stress points everywhere the posts touch each other and it's right in the middle of where you are trying to stay away from. Whereas the bow with hanging cords the stress is away from the centre but at the foundation but forbid the cords break.
Da Vinci born in 1452 - 1519 and this bridge is fantastic job. Please see China's Craftsman named Lu Ban. He born in 507 BC - 444 BC. He has a same creative self support bridge too.
Hello everyone, I hope you enjoyed the brilliant thought process behind Da Vinci's self-supporting bridge. I’d be grateful if you could support my channel today at www.patreon.com/Sabins. Your support is crucial to making our educational services sustainable. Wishing you a happy Diwali! Thanks Sabin Mathew
If you want to educate people, maybe mention that China has making this sort of bridge since long before Da Vinci was born.
Thank you for your work, Sabin! I love watching these videos.
Have you considered public grants for funding? PBS and the
Thank you for the video! I love these. Please keep it up!
Hello Sabin, I love your channel and what you share. I'm a working Timber Wright and have built several of these types of bridges over the years. I've never been sure why they get called a "Da Vinci" bridge since the Chinese Scholar Lu Ban (魯班) was the first I've known of to employ a "stitch bridge" almost a thousand years before Da Vinci even lived. Some to these did span further and at a lower angle. Though made of stone, the Anji Bridge (安濟橋;) during construction employed these very same timber joinery systems and understanding, and still centuries before Da Vinci...Thanks again for what you and your team share and do with your videos...
Can you make a video on how HPLC works?
I used this bridge to mend the relationship w my Dad, he abondoned me at 6yrs old. Thank you Da Vinci.
Thank ancient China.
@@AlbertaGeek What are you trying to say, that Da Vinci stole that idea for a bridge from Chinese? Even if there was such a thing in China that was unknown in Europe, so Da Vinci invented it (again).
@@ozymandiasultor9480 I would not say "stole", but more than silk travelled along the silk road. Knowledge travels, too you know.
Could he have "invented" it independently? Sure, why not? After all, I did so myself, as a Cub Scout during the early 70s, going for my 'Building' badge. It was a popsicle stick bridge that I deduced from that popsicle stick construction that would explode when you flung it at something (or someone). Pardon my nostalgia.
Dont think he left you. He left your mother.
Weird..but I'm happy for you, I guess?
Honestly out of all your practical demonstrations I've seen this was the best, fantastic work with this one!
Nice username
How is it practical? It seems like a terrible bridge design
A bridge where every point is literally a critical point.
I wonder why troops didn’t use it? 😂
Ohh no, it's a stable and rugged bridge. Our simple pencil bridge was able to carry more than 1 k.g of weight. The bridge had no problem, irrespective of the point or angle of load application. One thing is clear. This bridge will never fail because of the joint issue. More the force you apply the stronger the joints become. Yah, of couse if any of the members of this bridge fails, the entire bridge will collapse at once.
@@SabinCivil
Schrödingers Bridge
When I saw the animation I was skeptical, but then you literally built it on your office, that's why your channel is amazing.
Not DaVinci, Chinese used this type of bridges way earlier, Xianju bridge (仙居桥) is good example it was build 1452 year when DaVinci was born. Its covered woven timber arch bridge.
@@pete_lind xianju bridge is a traditional bridge with wood. This is a temporary bridge invented by Da Vinci for quick work.
I used this bridge to escape from North Korea to China. Thank you Da Vinci.
Thank China for the bridge. They've been making it for over a thousand years.
Damn, from super totalitarian regime, to just totalitarian regime. Congratulatioms still 🎉
You're walking straight into a catapult aiming for north korea lmao
Awesome!
I used a Da Vinci bridge to escape from the old Soviet Union to Alaska.
Da Vinci was a genius with everything he put his hand to. Thank you for this video.👍
Da Vinci is a great scientist and artist. However this is not his invention. This kind of bridge already exists in 11 century.
It is his invention, first this is done in a different method, second how the fuck would a person in Italy know what is going on in China, dude literally invented this on his own.
More of an engineer than scientist
The Chinese built a bridge - using the same general idea of interlocking timbers - about 300 years before DaVinci was born. It was called the Rainbow bridge and it is an equally fascinating early engineering feat.
It may earlier than 300 years!
Came here to say this. This wasn't his invention.
@@Qwertywin456 some historians (i dont know who) suggest the chinese built similar design about 3000 years ago.
@@Endureth I mean, he did invent it he just wasn't the first.
@@MorrisJohn-vo2vn "Invent" means first. Otherwise, it's "copy". English 101...
Thank you for very interesting physical experiments.
You are welcome :)
0:12 incorrect. There is a threshold of weight at which the structure cannot longer support. It is not possible to put infinite weight on the structure. There is a point at which the weight will not only weaken, it will deconstruct the structure.
Actually the construction is one of the methods to build an arch.
Stress of materials can be loaded in a) compression, b) tension, c) shear.
Stone and other materials are usually strong against compression, and less strong against tension and shear. Half circle ach is designed in a way that materials are compressed, which make the construction very stable.
The Leonardo self supporting bridge is excellent construction when building a stable bridge with least materials.
Another method would require huge amount of woods, but we can also build classic arch out of woods, in which woods are just compressed. The construction would then far more stronger than Leonardo self supporting bridge, while it is also self supporting. (We cannot build stable circle, though.)
@Nobody-iy6tm "no actually"...
You completely ignored my comment just to make some weird statements for yourself.
Clearly this structure cannot hold infinite weight. That's pure and simple fact not matter how you want to talk around it. Objectively, the structure has a threshold at which it can no longer support.
yeah but is the threshold the anount of weight the materials themselves can handle or is it just the weakest link type of situation?
I don't think anyone ever implied it can support infinite weight. Just that it can hold a lot.
Duh
Thank you again for your work, finally a channel with substance instead of meaningless "content"
1:40 “I am able to climb this bridge, with almost difficulty”
Such a cool video with a mix of animations, practical demos, and history examples!!!!
Although da Vinci is often given credit for this, the Chinese Emperors were building bridges like this a good period prior; some of it had to do with seasonal flooding problems that often took out small to medium sized bridges- the Emperor kept an inventory of these parts, these logs, and shipped them to where ever they were needed. First they were erected , then spanned, followed by a more reasonably sloped on side and off side to anchor it and make it usable.
Different styles of bridges, also he did invent it by himself, how would he know that the Chinese were building anything similar? This is the ancient world not modern times where a quick Google search would show him the plans lol.
@@Iselas181um you do know people still interacted each other back then right? 🤨
@@jelly.212 Who's to say China invented it. They could've also just heard about it from travelling traders and just gave it a much broader application. Weird how that works huh.
KEEP DOING WHAT YOU DOING WE LOVE YOUR RERUNS OF THE PAST.
you are the best, these videos are the best, you are a wizard in disguise!
Thanks for publicising the forgotten design idea. I had never head of it before.
With perfectly strait structurally components. The arch of the bridge is defined by the relations of the length and diameter of the of span components to diameter of the cross components. This understanding leads to several option to lengthen the span without scaling the components proportionally . Option 1 make the cross pieces thinner, possibly by notching them or using small diameter ones. The components are in compression and do not need to span such long distance so can be smaller anyway. Option 2 reduce the diameter or the span components where the meet the cross braces again using a notch or different material. Using notches will increase the friction and make the bridge more robust against a piece coming lose. Option 3 use curved span components. Components that curve in the opposite direction to the arch by some fraction. This happens in the video when the bridge flex under load, but this could an engineered choice. Are there any more options?
As an assistant professor teaching engineering students, I love sharing your videos with my class and discussing them together. I can hardly describe the excitement it brings to the students!
on the last drawing, you could place two parallel arc bridges on the same direction as the river flow, and then place another 3 arc bridges connecting these 2 arcs and the shores.
That's a really smart solution, pretty sure mine is worse.
I Appreciate ur dedication
I have known about this bridge for some time and have experimented with various iterations of it.
Everyone looks upon it as an arch bridge and for that it is brilliant.
One thing I tried, is to build it upside down i.e. an inverted arch.
As an inverted arch it can be rocked on the arch provided that each end is kept loaded toward the ground. To a limited extent it can be used to lower a load over a gap. As a form of crane
Extending it is easy and can be done very quickly as the outer end is held in place by gravity so no need to support.
Limited by the strength of the first beams as the load on them increase exponentially if pivoted at or close to the end
Good Sir, how about merging the da Vinci bridge with the tensegrity bridge design... I think both design fits so well...
I work at a local brewery and we have a footbridge in the outdoor area. It is engineered in this manner and I marvel at it all the time. It does have fasteners and is solid, but same design.
Thanks for this amazing video channel 👍❤
I believe the Chinese used this bridge well before day Vinci. It was known to them as the Rainbow bridge. Some research may confirm or deny this.
Chinese craftman named Lu Ban
This type of simple practical thing are generally like this.
Many other people also invented this but the one who introduce it better to rest of the world gets the credit
Such as
Pythagorean theorem
Zero
@@ballsmasher3000 everyone knows that India invented Zero now. Maybe the ancient people thought Arabs invented it. But everyone knows now that India is the original inventor.
That's cool. Learned a new skill. Thanks
This is fascinating!✨ Exploring the genius behind its design is such a treat-his ability to merge functionality and beauty is unmatched. Thanks for taking us on this magical journey through history! 🔍🎨
thanks for such good information sir
Subscribed to the patreon, your videos rule!
2:46 All the weight you apply will be transferred onto the density of the red pencils. They can also not be pulled outwards due to being inside a triangle; as soon as any one is removed it comes apart.*
Securitisation changes, in the office model the top piece is not in a triangle and spreads out the structure making a wider curve; also a lower bridge.
Remember those basic shapes, 2D is Hexagon.
good vid!
5:49 just use curved sticks to make the bridge way longer without increasing the stick size
Friction won't be effective enough
@ doubt it, but if needed straighten them at the needed part
Impressive work with both animation and practicals
Great simple and understandable explanation...
It is a really good experiment, but the issue is if you are using different pencils for the experiment (not sizes) shapes, like circular shaped pencils will easily slip, etc. But note it will be hard to make with pencils only and if it is not working and the result is not a bridge it must be because of the versatility of the pencils and the bridge. You can add toothpicks to strengthen your bridge but eventually, the pencils are ok my model could hold up to around 4 kgs just with the pencils but that's not too much weight, if you want to make your model really strong you can strengthen the green pieces by choosing strong wood or strong pencils mentioned in (1:02) part of the video, there is a disadvantage in the bailey bridge too, Even though it is temporary and it is costs less. The metal is mostly copper. Copper can easily rust and eventually, cracks are spotted so the bridge collapses if weight is kept onto after excessive usage. So Bailey bridges have an advantage and disadvantages😄! Mr. Sabin, this is a really informative video and I liked your animation and construction module. Thanks for the experiment once again!!! Thanks Everyone!
Bailey Bridge material is not copper.
That is such a beautiful looking structure. This bridge would make a beautiful entrance way or gate to a ranch, large property, or mansion. I picture huge oiled or stained, hand cut wood beams. Being only for looks and not structural, they should be fastened together using large wooden dowels for safety.
3:15 there's a ghost standing behind him
It's Snoop Dogg ig
ذيل شعره المربوط 😂😂😂
له شعر طويل مربوط لا وجود للأشباح 😂😂
Thanks sir because of you genius people, engineering students and professionals are coming with new thoughts in their domain❤
I know a compromise solution to the last problem: suppose the issue is the weight the bridge would have to carry. We can put bars nailed together over the entire river that can carry at least one person at a time. The person goes on the unsupported Bars until it's about the middle of the River, then the person has to ram a support tower into the riverbed, from the upside of the bridge. Now you can bed two Da Vinci bridges onto the support in the middle of the river. Use strings to support the horizontal bars. How exactly you get the support into the middle of the River is of less importance, you could use a boat aswell, once it's there you can save on many supports by using two or more Da Vinci bridges.
I think if we least use more heavy weight products like concrete or iron type with geometry shape might work as the water flow will not be able to cause that much pressure on it when flow increases.
aistructuralreview AI fixes this. Exploring Da Vinci's Self-Supporting Bridge
Very cool! thank you for explaining traditional wisdom
Wow really amazing explanation ❤❤
What a Great video
To be honest you're idea was good, all we need to do is to keep that in place by adding something to each joint or to the whole structure, to prevent it from being pushed by the current cover it in a net like cover to let the water pass through but keep the thing intact.
A good practical use is for putting up a survival shelter frame with little or no cordage.
Hello, watching from Phillipines ❤❤❤
Davinci was almost as smart as me which is quite remarkable.
Sabin stop posting under aliases
@Larry26-f1w crabbinsabin was already taken
It appears to be a bridge not only through space but also over time: from the Renaissance to Ancient Rome. Impressive!
Very interesting. This could be used for a number of interesting applications honestly.
The only way I can see it used in it's bridge form to lengthen it besides using it in those manners would be to try to interlock them using maybe two half circles. I would have to test on smaller scale.
It seems it has a lot of potential outside of bridge use though.
For example, it seems it would be advantageous in survival scenarios to know how to create this bridge, or use cordage to create a full circle, turn it sideways, maybe stack a couple. It could give you a cylindrical shelter. There's a lot of potential with it. 😊
Amazing da vinci idea but instead of wood try some low weight but strong material and circular wheels that float and join all floating circles with rope and make a plank over that for a temporary floating but rigid bridge, excellent demonstration video, you tube needs such video to show potential of video demonstration of powerful ideas easily, if alive today, Leanardo davinci would have used RUclips very well to improvise his ideas
I apologize i couldn't get through all the comments. Have you tried building as a 4way or continuing off of the top 3rd. Like a locking partial in between the 2 sets. Or tension line from middle of crest to inner leg of a posing structure
Or a third bridge upside down between the 2
So cool! I never heard of this- thanks for sharing!
Amazing video, thanks!
The other advantage of the Bailey bridge is that it is flat, making it much easier to walk across and move rolling stock.
Great video
So cool, I'm getting some sticks so I can show my children! It's a shame that a failure of part is a failure of the whole, no redundancy, but the ingenuity is off the charts.
this is insane yet practical
An airless tires would be a great idea using sticks wrapped in a rubber or some durable coverings or something to keep everything in place
Those troops crossing over the bridge look like a very ferocious troops 😂
Very nice explanation 👍🏻
🎉 excellent information 👌
I think the main interest from practical point is how to use them as scaffold, for building a stone arc or other structures. In that case, using ropes is not a bad idea, as both ropes and wooden bars are lightweight and can be assembled quickly.
It seem like it's strength requires the bridge to expand outward evenly as weight is place on it. Did you try the bridge out in the elements to make sure it could slide evenly across the dirt of a river bank?
Nice one Anthony keidis 🤘😎
Set the supports on piles that rise out of the water. I think the Romans actually used this type of bridge on campaigns but they built a proper top deck.
Looks like an excellent method to erect an early arc intending to build a stone bridge. Thank you for the interesting video 👍
What happens if you apply pressure in the opposite direction, from the inside of the curve, rather than the outside? Does it still hold? If so, could you add a flipped segment when the fridge starts curving down, to have it curve back up?
They used planks to make that show bridge. If they turned those pieces of wood 90 degrees so they are on their edges the bridge would be even stronger. It's why logs are so strong. They don't have a bad side to have pressure on.
Great video.👍
Many thanks
would placing the submerged bridges in your last animation parallel to the flow of the river instead of perpendicular and then placing the planks over them help?
East Asia was using this technique for hundreds of years before Davinci. People think he invented the ideas he illustrated, completely unaware that he was reading about them in a library.
What is the longest Da Vinci's Self Supporting Bridge you've heard of?
Grok
The most famous version of Leonardo da Vinci's self-supporting bridge is the proposal he made in 1502 to Sultan Bayezid II of Constantinople (present-day Istanbul) to span the Golden Horn. This bridge was designed to be 240 meters long and 24 meters wide, which would have made it the longest bridge in the world if it had been built.
It is also worth mentioning that a modern version of this design, called the Vebjørn Sand da Vinci Project, was built in Norway over the E18 highway in Ås, in 2001. This bridge is 109 meters long with a main span of 40 meters, making it a of the longest built according to Da Vinci's design principles.
That demonstration was cool
5:47 Perhaps if you could reverse the direction it arcs in? Or if instead of the two bridges in this example being stationed submerged in water you could have one foot of both bridges be on land while the other two feet are pressed together in the air so as not to fall? This latter option is impractical though even if possible.
They should use this on the parts of the Appalachian trail where small bridges were destroyed. This wouldn’t do much for cars and bikes, but it would be great for hikers on the trail.
Do the Sticks have to be the same length? If not you may can regulate the radius.
great story, but could you explain how the bailey bridge keeps it's form? without sagging etc? also a good bridge history would be great part 2 to this!
Excellent video. Can you do a follow up video on the mathematical bridge in Cambridge, England please?
We can use key and slot profile at the joining sections of two members to avoid slippage during high water flow but I see another that at the virtical deflection of the structure can't be determined in case of continuous varying load and the structure might get collapsed due to uneven loading at different points. Pls correct me if assumed incorrectly.😊
So... to actually use this incredible, no nails, no fastenings bridge, all you have to do is fasten all the parts together with rope first.
Or make a different bridge first to get to the other side so you can use this bridge.
Wow, what an amazing invention.
That was really cool
The solution lies in twisting the bridge to cancel out the curvature. The minimal self-supporting & self-locking structure is the PENTAHELIX, that is a lateral frame expansion of the Tetrahelix
can the bridge be lengthened by switching out only the middle planks with extra long ones?
joints across could be tightened with screw and cementation could also be done across joints in river bed
Nice. Are they used to cross small rivers and creeks? They would be very useful in remote areas where rivers and creeks flood and become impassable.
Why take the rope ties off?
🤔 let me know please , is that compulsory Having Same length and width and height sticks for the bridge or can we make this with different size sticks ?
5:38 I think to elongate the bridge is to rope together a pair of wood into a wide v shape and replace that as the supporting sides of the bridge. potentially even flattening the bridge into a self supporting ladder-like appearance. look at how curved the pieces are at 1:54 and you can see the what I'm talking about
This bridge model good for trap purpose. 5:43 If want to make it more steady maybe chain each poles of each junctions to make sure no pole edge or a log removed by accident.
Replying so your comment gets recommended by RUclips.
The Japanese have been building “DaVinci” bridges for centuries before DaVinci was born. Some are still standing today.
Thing
Thing comma Japan
Such a good bridge it was never used once in history.
Is it possible to use two bridges in an inverted maner like a 's' Or snake like structure with a log passing through the centre of this structure.
I guess that might help in wider range scenario
Trying this out yourself with simple pens & pencils will FUCK YOU UP GOOD
Why doesn’t it work with pencils
Excellent!
Stop changing the channel name.
Or make just one more change and remove the 's'. "Sabin Civil Engineering" sounds so much better!
wtf are you, a gen z?
I liked the old name better....this one Is a little weird for me but again it's just my opinion not forcing it
Why does he keep changing the channel name? I won't subscribe. He sounds wishy washy and insecure.
Incredibubble 💚
Prof, can you put a separate video of how you prepared the whole circle using pencils. It was wonderful, I tried it a lot of times.
The problem with this design is that there are stress points everywhere the posts touch each other and it's right in the middle of where you are trying to stay away from. Whereas the bow with hanging cords the stress is away from the centre but at the foundation but forbid the cords break.
Built this in stem class during a bridge building competition and it won held more weight then the teacher had
Da Vinci born in 1452 - 1519 and this bridge is fantastic job. Please see China's Craftsman named Lu Ban. He born in 507 BC - 444 BC. He has a same creative self support bridge too.
Just curious,
Can it be used as a suspension bridge?
To address the underwater solution, building the bridge with steel and then welding them together should provide a stable base.