excellent explanation and editing work.. It's hard to find explanations without having to listen to someone's life story and struggles. To the point and clear thank you!
wow! I am an Urban sketcher and tried to sketch the Telus Science geodesic dome in Vancouver, BC last weekend...so came here looking for help....am also a retired civil engineer...never learnt this stuff in school..went to school when computers occupied a whole room! This is so interesting! Thank you for sharing!
Thanks, I appreciate your comments, I had to do a lot of planning to get this video to be understandable. It is a difficult topic. Thanks again for watching. John Hurt
This should be taught in geometry class. I learned so much from this channel in the last 40 min. Now I'm very motivated to make small models to test my own designs.
Initially i was confused as to why a 1v dome would have two sides to it and still be called a 1v dome. But imagining this as dividing one edge of an icosahedron triangle made it clear to me. Dividing one edge of an icosahedron triangle by 1 means 1v, dividing by two means 2v and so on. Thanks
I wish I could have been a pilot. I did fly gliders in Eagleville, TN a few times, but never got my license. Thanks for watching the video and have a great day. John Hurt
I have a question. Take a look at the illustration at 9:12 for reference for what I'm about to ask. That triangle that is pointed out is based on puffing out a tessellated facet of an icosahedron until the vertices of the tesselated facet touch the sphere that the dome is trying to aproximate, right? At 5:42, you show that one of the edges of the icosahedron would be sub-divided and expanded until the vertices touch the circular arc whose curvature matches that sphere. If this is so, why aren't segments A, H, and I (the five struts along one edge of the tessellated triangle) equal in length? I'm sure some segments would have to have different lengths to conform to the sphere, but I don't get why the largest number of lengthed struts are all in the middle of the triangle rather than along the perimeter of the triangle.
The Blue "G" struts in the center of the panel are the longest struts, while the Red "A" struts on the outside corners are the shortest, followed by the short H and I struts along the edges. The longer G and other struts in the center of the panel and shorter A, H, and I struts on the edges causes the panel to "bulge" in the middle, just like if you take a circular piece of paper with a pie slice taken out of it, and pull the circle together, it will create a "cone" shape. As the outer struts become shorter, and the inner struts become longer, this will create a curved surface. Thanks for your comments, I appreciate them. John Hurt
Thanks! Now to go further down the youtube rabbit hole, I have to find a video that generalizes the surface area and count of each facet as frequency approaches infinity. I know what it will be, but it'll fun to see the derivation.
This is a very intuitive description of dome frequency, but not how to actually construct one in, for example, Sketchup. Divide the edges and push them out; how far? based on what?
To determine the higher frequencies, they are pushing the vertices or hubs out to the edge of an imaginary sphere, and drawing the edges between each of these vertices. That is some amazing mathematics applied to geometry. For Walther Bauersfeld, who developed the first geodesic dome, and was the lead engineer for Zeiss who ground lenses with precise curvatures, the math was a piece of cake. For the rest of us "mere mortals", it is just over the top. Thanks for watching the video. John Hurt
The icosahedron is already closer to a spherical shape than the other platonic solids, so it makes a good start for a geodesic dome. But the Icosahedron based domes cannot be easily halved or quartered as can the domes based on the octahedron. So it really depends on how you plan to use the dome. Thanks for watching the video. John Hurt
A 1V derived from a dodecahedron is closer to a sphere than a 1V derived from an icosohedron (which is just an icosohedron). But as Zip Tie Domes mentioned, it all depends on how you plan on using the dome. IE: Where you plan on cutting it, and how large you want your panels to be.
I just love the frequency design! Could you tell me please, what could be the best frequency in a Dome of 16' in my back yard with the dimensions of 25' x 40'? Thank you for sharing your knowledge!
this is a fantastic video and it helped me immensely, but i do want to say that the "test" at the end of the video was too easy because it used images from the beginning of the video. other than that, this is fantastic, i feel a little bad pointing that out. i love this, don't get me wrong!
Thanks, Henry. Most people don't pay attention like you do, and just don't have a long attention span. I wanted a lot of people to "pass the test" even if they just recognized the same photographs through their subconscious memory. I skim through things a little too fast myself, and when I get to the "test" part I always think "wait a minute, that looks familiar" to get the grade, or else choose "C" on a multiple choice test if I don't really know. I was bored in high school and most of college, and got through it all doing just about that much work, if at all. So I am kinda lax on the testing part, and feel positive for people that have my same "disability". Today it is all about being creative to build what people want, and being able to communicate your creativity in a positive way. We need more welders and less lawyers, but those people that build things and that can make it all so entertaining, like Bob Vila's "This Old House", or Bob Ross and his painting shows, these people will lead the world. I love something that is real entertainment where you learn something too. Imagine a world where "Pewdiepie" is teaching calculus and advanced engineering, and the kids love it and understand it. I think that is the future, where all of the entertainment is something useful. Have a great day, and thanks for watching the video. John Hurt
Very good video and I liked the explanation. However, at 7:00 how can a sum of all angles be more than 180 degrees? It should be three times 60 degrees. I understand that the dome is curved but a single triangle is still a strait plane and it's not curved. It doesn't make sense to me. :/
Triangles on a sphere are "non-Euclidian" geometry and don't follow the same rules as normal triangles. Think about a line drawn around the equator of a globe, divided into 3 equal segments, with a vertex between each segment. The angles at the vertex would be 180 degree between each of the lines. Move the triangle closer to the North Pole, and the angles start to approach 60 degrees each, but they never reach 60 degrees in spherical geometry. This is hard to visualize and understand, is the reason why Walther Bauersfeld, the lead engineer at Zeiss where they make curved lenses, was the first person to design a geodesic dome - by tessellating triangles using spherical geometry - which is absolutely brilliant. Thanks for watching the video. John
Thank you for the clear explanation and documentation. Simply elegant solution to a single person build.I understand everything stated but what would be the downfall to using poles all the same length with your hub design? Is it just going to be less spherical with the asset of being even simpler?
I see aluminum dome roofs being used on storage tanks and they seem to follow the geodesic principal. However, on these domes all the Node Points have six connections - so how can you determine the Frequency?
I caught that you multiply by 1.2 to go from B (main equilateral triangle) to A, but what would be the value to go from B to C, B to D, etc? Also, in 1v, the angle between faces is acos(sqrt(5) / 3). How does that evolve in a geodesic dome for2v, 3v, etc.? Thank you for your answers.
We use the chord factors to multiply the radius to get the length of the chords/struts. The chord factors are located on the right of each dome calculator, like this one: www.ziptiedomes.com/geodesic-dome-calculators/2v-geodesic-dome-calculator.htm For the 1v, the struts are all the same length. Not sure I can answer the last question you have. Have a great day. John Hurt
There is a maximum number of vertices for each frequency. If you increase the frequency, the number of vertices increases. So there is no real maximum to the frequency or number of vertices, but realistically, around 6v is the greatest frequency most people use. Thanks for watching the video. John
You lost me at 360 degrees divided by 5... at 7:11 I see a triangle that should have a total sum of edges 180 degrees however 72x3 = 216 degrees. Could this have anything to do with that the image at 7:11 on the dome is not actually flat??? But I cant see how that is related exactly.
Yes, the dome is not flat, so you can't use Euclidian geometry, so no triangle can have a total sum of 180 degrees in spherical geometry. Thanks for watching the video. John Hurt
just curious and perhaps I missed it: What are the benefits to higher frequencies ? Strength ? Is there a standard formula for calculating the increase in strength between frequencies ?
A higher frequency with more triangles lets you build a larger dome while keeping the struts to a reasonable length. Most DIY domes are built from PVC or EMT conduit, and you don't want your struts to be over 5' in length with these materials. So with 5' struts, a 2v will create a 16' diameter dome, a 3v for a 25' dome, and a 4v for a 32' dome. The strength is really more dependent on the strut materials and hub design, so there is no easy formula for calculating an increase in strength for a higher frequency. If you want to know how strong something is, then build it and test it. The results from actual testing have blown a lot of formulas out of the water. Thank you for your comments. John Hurt
How do you calculate the angle that the struts make with the hub ? I mean since each hub with 5 or 6 spokes is not flat and is not a flat plane, how does one calculate the angle the struts make with the hub for 2v, 3v, 4v, etc domes?
The axial angles are different for every frequency, and to be precise, the axial angles are different for every strut length in the same dome frequency. With dome construction made from hubs and struts, you only need to consider the length of the struts, for as the dome comes together, the correct axial angles are achieved when the struts are connected to the hubs. With geodesic dome panel construction where each triangle is a complete panel, and you are not using hubs and struts, then the axial angles so that the panels will fit together are very important. For geodesic domes made from panels, please look at Paul Robinson's Geo-Dome UK site, he has a lot of information about the axial angles for panel construction. geo-dome.co.uk/
Hi there, It was pretty cool I must admit. How did u calculate the length & angles of the triangles for a desired diameter? I want to make a 5v geodesic, 500mm & a 300mm diameter balls, how do I calculate the triangles? Please do reply...
We have several geodesic dome calculators at this link: www.ziptiedomes.com/geodesic-dome-calculators/geodesic-dome-calculator-index.htm Here is a video on how to use the calculators: th-cam.com/video/hH21jpyJzlo/w-d-xo.html Thanks, John Hurt
Great explanation! Thank you! I saw that you have a calculator on your website similar to the acidome one. I didn't see, however, an option to calculate the bottom upright strut length variance in order to "level" out the bottom plane of say, a 5/8 3v dome. Did I miss it? If it isn't there, it would be a welcome addition. :)
Brian, Thanks for watching the video. On the 3v and 5v domes, the base is not perfectly flat. For a 25' wide 3v dome, there is around a 2" slight deviation in the bottom struts from a perfectly flat base. This is significant when you are using flat panel construction, but for hub and struts made from PVC, they will flex and the deviation will not be noticeable. You can build a "Kruschke dome" that is 3v with a flat base, but it requires 4 different strut lengths, and for what we do with our domes, the added complexity is just not worth it. But you do have a good point. I am working on my dome calculators this week and will look at adding a 3v Kruschke dome calculator for anyone that needs to use it. Thanks again for watching the video. John Hurt
@@ZipTieDomes I love your work John. Your 'Krapps Last Tape' was fantastic and as for The Elephant Man, Alien, Watership Down...just, bravo maestro. I was saddened to hear of your demise. I'm glad you're still keeping yourself busy with the old geodesic explainingment. Quick question; in the video where you explain the 6v dome equating to 6 edges, there are five arrows pointing to 5 new points, and so forth on down, I don't quite follow, can you clarify? Thanks and regards. Werner Herzog.
@@sweatshopjesus Did you ever see "Werner Herzog Eats His Shoe"?. To tessellate the icosahedron face into 36 different tiles, the edge of the icosahedron would have to be broken into 6 segments - with 5 breaking points - with each point lifted to the edge of the sphere to create the geodesic dome. You ought to have asked me how I came back to life, now that is a real story.
With a 6 v frequency dome domerama indicate a particular strut near the pentagon is an A strut this doesn’t make sense it should be a C strut can you help ? I am designing a twin wall 6v 5 metre radius dome centre, outer skin 5.1 metre and 4.9 metre inner skin. This produces a dome with a cavity. Regards Michael
The letters on the different calculators may be different, but the chord factors are the same. Look at the chord factors and match against the assembly diagram. You are welcome to use just the Domerama calculator - they are very accurate. The same dome mathematician that checked out the Domerama calculators checked the Zip Tie Dome calculators for accuracy Both sets of calculators use the same dome formulas. So either set of calculators will work. Stay with one or the other to be consistent. The Zip Tie Domes calculators are set up so that the red struts are always the shortest, and the blue struts are the longest. That could be throwing you a curve ball. I hope this information is helpful. Thanks for watching the video. John Hurt
I would like to correct a mis-reading. The letter you are calling "v" is actually the Greek letter ν ("nu") which looks like the Roman alphabet "v". In physics and engineering, nu is the variable used to represent frequency. Google "What Greek letter stands for frequency", and you will see that in engineering and physics, the Greek letter ν (nu) is used, just as θ (theta) is typically used as the variable that stands for angles.
The denominator (8 or 9) refers to the number of tiers of triangles to make a full sphere. The numerator refers to the number of tiers in the dome. That is not a perfect explanation, but close.
Greetings... I am Roel Vera Cruz. I am learning about geodesic dome. I am planning to use this design in my home... The layout of my home is octagonal. The radius is 16 feet. Do you have any recommendations on what frequency shall I use? The location of my home is in the eastern part of the Philippines where the typhoons usually passes from the Pacific. Thank you very much...
Note, there is actually an infinite number of ways you can cover a sphere with triangles. For example, I just designed a dome with a similar number of triangles as a V3 icosahedron-based dome, but it has 18 base triangles and a hexagon on top with 6 pentagons spaced around the side.
@@ZipTieDomes I developed the simpler version out of the desire to make a very large greenhouse. By basing it on a top hexagon, the sides can be flattened and multiple domes can be joined in a hexagon pattern. From the inside, it would look like an array of posts supporting the roof.
@@ZipTieDomes The tetra-hz is similar in that it can be used in multiples. Fairly basic with only 30 struts. The base triangles are perfectly vertical which is handy. Small ones make great cloches . th-cam.com/video/kJteHbJV5eM/w-d-xo.html
It depends. If you have a really high frequency, the pentagons and hexagons are "flatter" and not as strong to prevent a hub inversion as the lower frequencies. But the higher frequencies let us us a shorter strut, which is stronger. Geodesic Domes are good up to a certain size, and then become complicated in order to keep their strength. Thanks for watching. John Hurt
It is a Class 2 sphere 8 frequency that is further subdivided by 3 isosceles triangles in each face. More information is here: en.wikipedia.org/wiki/Spaceship_Earth_(Epcot)#Structure Thank you for your comments. That is a good question. John Hurt
Can you calculate my hometown's zoo geodesic "desert dome's'" frequency based on this url page of photographs ? My vision and perception is not as keen as in my younger days, and I can't see the forest for the trees. I am not able to perceive the 5-way connectors due to the multiplicity of of 6-way connectors :) - www.flickr.com/photos/41978639@N03/15793038276/ Here are more images of same dome in different light - www.searchencrypt.com/images?eq=CsFzNdOw2f29jp0hBWxwK5r4bFxaznByu%2FKBKRXfSTfBJmgHf3NlMUFg7SJaTly3
It looks like an 8v or 8 frequency dome. Look through the windows to see the struts on the back side of the dome. There are two 5-way connections visible, with what appears to be 8 struts between them. Thanks, John Hurt
To render the dome, I use Paint.net. I take an original dome drawing, then overlay it with the correct color struts and put the alphabetic labels on each strut. To make the animation, I erase one strut at a time, make a .jpg file for each change, then continue until all are erased. Then reverse the order of the .jpg files to make it build in Video Studio. it sounds like a lot of work, but I have shortcuts that I use. Thanks for watching the video. John Hurt
I am working on building a dome within a dome, with both covered in fiberglass mesh with latex cement - as a form for aircrete or hempcrete put in between the two domes. It will probably be next spring before I can make a video. Rammed earth is really cool too. Maybe you can do rammed earth for the vertical section of the dome at the bottom, and go over the top of the dome with air crete or hemp crete. Keep going, and try something new every few days, and it will pay off. Thanks for watching the video. John Hurt
@@ZipTieDomes How is the dome within a dome coming along? It's been a while since you posted anything. I am very interested! What size did you start off with? Did you do bamboo or PVC? Did you cover one in see through material and the other in a solid material? Did you insulate either one? Curiosity is getting to me! I am weighting the realistic fantasy of building a geodesic dwelling or a pyramid one. I am wondering if their is any frequency in vibration changes when you build the geodesic homes. Comparing it to a pyramid. 🤔 Thanks for your videos. I do hope you do more! Suzanne 🤠
@@suzanneweitzel8969 I have a prototype of the dome inside a dome, but now I am trying to finish our tunnel dome assembly manuals. I am using a tunnel dome as a sheep barn this winter. I have one dome covered in latex cement over mesh that is working very well. You can see a picture of my concrete dome at the bottom of this customer review: www.ziptiedomes.com/customers/lenabach.htm Thanks for checking up on me. I appreciate your comments. John Hurt
@@ZipTieDomes Fun postings! I hadn't seen these! I am curious, if the silo domes have the same wind resistance! I currently am in the saddle of a mountain pass. First spring here I experienced 95 mile an hour guts! I was to be in an easter parade the next day. It was canceled! A lot of wind damage all over cochise county! One for the records! It is common to get 45-60 mile an hour spring winds. It does get tense at times. That's the reason for asking about the silo looking domes for wind resistance. Also, how would I ground one for lightning? You have one shown made from #5 (I think) rebar. Do the others need grounding? For an actual all season long term dwelling? Or can you link me up to your postings on this of kind question! Thank you for your replies! Suzanne 🤠
@@suzanneweitzel8969 A customer said that one of our domes, not a silo, survived Hurricane Ian. Put 2' long rebar stakes in every hub that is on the ground. You can also tie the dome to the ground with a ground anchoring system and steel cable. If the lip of the dome comes off the ground, it will catch air and become a parachute - and nothing can hold it down at that point. But the dome itself won't have a problem with wind as it is round. The dome is made from PVC plastic, and does not conduct electricity, so you won't need lightening protection. Most wooden houses have no lightening protection, and are rarely hit by lightening, while large steel and concrete buildings all have lightening rods on the top to reduce the electric potential. Thanks for your comments. John
Tôi là người việt nam. Nay mới biết đến kênh này của ông. Tôi rất thích những bài học từ ông . Chúc ông và gia đình gặp nhiều điều tốt lành. Ông có thể cho tôi i mai của ông được không ạ. Tôi muốn tìm hiểu về nghành học này.
Спасибо, брат, я ценю твое сердце и понимание. Благословения вам и вашей семье. Джон Хурт Thank you Brother, I appreciate your heart and understanding. Blessings to you and your family. John Hurt
i don't understand a need for this terminology and I haven't noticed it in geometry. I seem to find it only connected to amateur buildings and companies making commercial domes. All these "higher" frequency domes are actual polyhedrons with a mathematical name.
This video is for designing domes in general, not just zip ties domes. But if you look in the upper right corner of the video, you might just see one or two. Thanks for watching the video. John Hurt
A teepee is different from a dome, and is not subdivided into frequencies. A teepee is strong, and like anything else, it really depends on how you build it as to how much strength it has. Thanks for watching the videos. John Hurt
While interesting, it's pretty old stuff. What is REALLY needed, is more automated, detailed explanation of the ENGINEERING. Most engineers just roll their eyes at domes, and the ones who master the calcs, charge a fortune. After all these years, it really can't be that hard.
Ray, Most people watching TH-cam are not engineers. If they were, I would have started the video with how to determine the chord factors using spherical geometry. Using just the chord factors, I wrote all of the dome calculators in Javascript at www.ziptiedomes.com/geodesic-dome-calculators/geodesic-dome-calculator-index.htm Like you said, it really wasn't that hard, if you know how. I talk at little bit about chord factors at 6:10 in this video: th-cam.com/video/hH21jpyJzlo/w-d-xo.html Again, not very hard. What is "hard" to do, is to find a new way to use a geodesic dome, instead of using it to build a spherical house that leaks. Stanford Research Institute is using our domes for radar reflectors at the Hat Creek site for the SETI project, as our domes are the only ones made entirely from plastic with no metal parts. I am also working with a university on an Ambisonic Dome th-cam.com/video/OzvZcisDq9Y/w-d-xo.html which will ultimately be combined with dome projection. th-cam.com/video/NGdUZGsOz0I/w-d-xo.html Combining ambisonics with 360 dome projection will be the entertainment system of the future. Not that hard, but you have to be creative and think outside the flat screen and headphones. Oculus Rift has a lag that makes me seasick, and the VR goggle experience cannot be shared with a friend. Geodesic domes for family home entertainment are much more enjoyable than goggles, as you don't lose your sense of self. One of my favorite videos on dome engineering that you may find interesting is by Paul Robinson at this link: th-cam.com/video/TqxarO-5igc/w-d-xo.html Thank you for your comment. John Hurt
@@ZipTieDomes This video makes me think that the Cinesphere in Toronto's Ontario Place is not an actual geodesic dome. It looks to me like the spherical effect has been achieved by removing struts as the shape reaches its top. Correct?
@@ronjenkins4257 Here is a link to the Wikipedia article on the Cinesphere: en.wikipedia.org/wiki/Cinesphere The Cinesphere is not a "triodetic dome", but is using triodetic hubs as connectors: www.setareh.arch.vt.edu/safas/010_system_08_triodetic.html A standard geodesic dome has a 5-way hub every 72 degrees around the dome, where the corners of the original icosahedron occur. I can see no 5-way connections on this dome, rather each level of the horizontal struts appear to be perfectly parallel. This makes me believe that the strut lengths have been computer generated and were not developed from chord factors. A computer generated dome would most likely create more unique strut lengths and make the dome more difficult to build. But a dome like this, with the beautiful horizontal strut lines that have been produced would be perfect solution for an architect like Eberhard Zeidler, although it would be nearly impossible for the rest of us to even think about. A very good design indeed. Thank you for the information. John Hurt
Yea buddy, I'm from Tennessee, just a stone's throw away from Arkansas and the Clintons. And a lot of people here in Tennessee do throw stones whenever the Clintons are in town - usually at each other. Al Gore is also from Tennessee. If Al Gore had won his home state of Tennessee in 2000, he would have been president. I guess being around the Clintons rubbed off on him, since he could not win his home state. My mother in law was from Georgia, and she talked as slow as molasses. The way we speak down here is an art form masquerading as communication. Thanks for your comments and for watching the video.
But people are not really making geodesic domes at all the flat surface they are making is very 2 dimensional > geodesic domes are made of the tetrahedron NOT triangles >>>> buckminster fuller made geodesic domes with tetrahedrons
Frequency is the number of times something happens over a given period, or to an object. In this case, it is the number of times a triangular section of an icosahedron has been tessellated into smaller triangles. Yes, it does sound like jibberish as most people are not familiar with this technique. Thanks for watching the video. John Hurt
The clearest explanation about dome frequencies I have ever seen. Thank you.
Thanks, I appreciate your comments. John Hurt
excellent explanation and editing work.. It's hard to find explanations without having to listen to someone's life story and struggles. To the point and clear thank you!
Thank you for your comments, Jon.
I appreciate the positive feedback.
John Hurt
wow! I am an Urban sketcher and tried to sketch the Telus Science geodesic dome in Vancouver, BC last weekend...so came here looking for help....am also a retired civil engineer...never learnt this stuff in school..went to school when computers occupied a whole room! This is so interesting! Thank you for sharing!
Thanks, I appreciate your comments, I had to do a lot of planning to get this video to be understandable. It is a difficult topic. Thanks again for watching. John Hurt
This should be taught in geometry class. I learned so much from this channel in the last 40 min. Now I'm very motivated to make small models to test my own designs.
That's great, I am glad you liked the video. John Hurt
This is a really useful explanation. Thank you for putting in the effort to keep things short and relevant.
Thanks, I appreciate your comments. Thanks for watching. John Hurt
I've been really confused about the exact math for domes. This is such an awesome explanation!
Thanks!
Thanks for this. I'll watch it again and again till it's clearer to me. Great graphics and explanation
Thanks, I am glad you liked it. John Hurt
this is the simplest but the best explanation about all dome "secrets" . thanks a lot for sharing this video with us.
Thanks for your comment. John Hurt
@@ZipTieDomes what's stronger? Pyramid or dome???
@@wvaraujo1 A pyramid would be stronger for stacked stonework, and a geodesic dome is stronger for space frame (strut and hub) or panel construction.
@@ZipTieDomes thank you for replying. But what l really want to know is the power strength of the magnetic field, can you please let know?
@@wvaraujo1 I don't know.
The absolute best dome visualization and explanation I’ve ever seen! Thank you! I’m saving this for future reference
Thanks! I appreciate your comments. John Hurt
I finally get this after watching your video. Thanks a million!
Thank you for your comment. It is great to hear when people appreciate what you have done. Have a great day. John Hurt
Best explanation ever! I'm trying to understand Fuller's Geodesic Dome and this video is an excellent start.
Thanks!
Love the very well explained video on dome frequencies. Excellent work!
Thanks, Luc, I appreciate the comment. John Hurt
excellent video, many thanks for the hard work you put into it, it sounds almost simple now :)
Thank you for your words of encouragement. That really means a lot. Thanks again. John Hurt
Initially i was confused as to why a 1v dome would have two sides to it and still be called a 1v dome. But imagining this as dividing one edge of an icosahedron triangle made it clear to me. Dividing one edge of an icosahedron triangle by 1 means 1v, dividing by two means 2v and so on. Thanks
That's a good analysis. Thanks for watching the video. John Hurt
Clear, precise, thank you for your great job !
Thanks for watching the video! John Hurt
كل ما شاھدھ ھذا الدرس استفدت شي جديد
Thanks for watching the video. John Hurt
Felicidades... Me parece increíble lo bien explicado que lo has dejado con el relato de tus vídeos... Muchas gracias
Thank you!
If you world have been my math theacher I might have become involved in math iso becoming a pilot. You are good at this.
I wish I could have been a pilot. I did fly gliders in Eagleville, TN a few times, but never got my license. Thanks for watching the video and have a great day. John Hurt
Best explanation I've seen. Very well done.
Thanks!
great explanation. easy to understand thank you
Am I going mad? The last dome in the test is 4V not 3V right?
Amazing video by the way, so clear and concise! Thank you
It is a 3v dome, there are 3 struts between the 5 way connectors. Thanks for watching the videos. John Hurt
Ah, I was reading from the bottom row of connectors and saw a 6 as a 5. Thanks for the clarification!
Thank you so much for posting such a great explanation. Much love to you💫💕✨
Thanks, I appreciate your comments. John Hurt
I have a question. Take a look at the illustration at 9:12 for reference for what I'm about to ask. That triangle that is pointed out is based on puffing out a tessellated facet of an icosahedron until the vertices of the tesselated facet touch the sphere that the dome is trying to aproximate, right? At 5:42, you show that one of the edges of the icosahedron would be sub-divided and expanded until the vertices touch the circular arc whose curvature matches that sphere. If this is so, why aren't segments A, H, and I (the five struts along one edge of the tessellated triangle) equal in length? I'm sure some segments would have to have different lengths to conform to the sphere, but I don't get why the largest number of lengthed struts are all in the middle of the triangle rather than along the perimeter of the triangle.
The Blue "G" struts in the center of the panel are the longest struts, while the Red "A" struts on the outside corners are the shortest, followed by the short H and I struts along the edges. The longer G and other struts in the center of the panel and shorter A, H, and I struts on the edges causes the panel to "bulge" in the middle, just like if you take a circular piece of paper with a pie slice taken out of it, and pull the circle together, it will create a "cone" shape. As the outer struts become shorter, and the inner struts become longer, this will create a curved surface.
Thanks for your comments, I appreciate them.
John Hurt
Thanks! Now to go further down the youtube rabbit hole, I have to find a video that generalizes the surface area and count of each facet as frequency approaches infinity. I know what it will be, but it'll fun to see the derivation.
Good luck on your quest! It sounds like it may take a while. Thanks for watching the video. John Hurt
This is a very intuitive description of dome frequency, but not how to actually construct one in, for example, Sketchup. Divide the edges and push them out; how far? based on what?
To determine the higher frequencies, they are pushing the vertices or hubs out to the edge of an imaginary sphere, and drawing the edges between each of these vertices. That is some amazing mathematics applied to geometry. For Walther Bauersfeld, who developed the first geodesic dome, and was the lead engineer for Zeiss who ground lenses with precise curvatures, the math was a piece of cake. For the rest of us "mere mortals", it is just over the top. Thanks for watching the video. John Hurt
Love the video! Can anyone tell me why the icosahedron is the best platonic solid to build domes with? Thanks!
The icosahedron is already closer to a spherical shape than the other platonic solids, so it makes a good start for a geodesic dome. But the Icosahedron based domes cannot be easily halved or quartered as can the domes based on the octahedron. So it really depends on how you plan to use the dome. Thanks for watching the video. John Hurt
A 1V derived from a dodecahedron is closer to a sphere than a 1V derived from an icosohedron (which is just an icosohedron). But as Zip Tie Domes mentioned, it all depends on how you plan on using the dome. IE: Where you plan on cutting it, and how large you want your panels to be.
Even frequency ICosahedrons can be halved easily and sit flat odds can't
I just love the frequency design! Could you tell me please, what could be the best frequency in a Dome of 16' in my back yard with the dimensions of 25' x 40'? Thank you for sharing your knowledge!
A 3 Frequency dome will make a good dome that is 25' wide and 14' tall.
John
Zip Tie Domes. Thank you for answer my question! Blessings!
Thanks for the explanation .. It's scary that I actually understood it.
That makes me feel better. I am glad you liked the video and that you understood what I had to say. Thank you for your comment. John Hurt
... Congratulations, I do not know why there are 15 idiots who put their thumbs down in this video.
A cordial greeting.
Thanks, Danilo. Greetings to you, too. John Hurt
today, at 4/2/2020 it increased to 40 idiots and all of them are covid19 infected
maybe they're from australia
The math is very interesting. Is 6v max frequency? If so, is there a simple proof somewhere?
this is a fantastic video and it helped me immensely, but i do want to say that the "test" at the end of the video was too easy because it used images from the beginning of the video. other than that, this is fantastic, i feel a little bad pointing that out. i love this, don't get me wrong!
Thanks, Henry. Most people don't pay attention like you do, and just don't have a long attention span. I wanted a lot of people to "pass the test" even if they just recognized the same photographs through their subconscious memory. I skim through things a little too fast myself, and when I get to the "test" part I always think "wait a minute, that looks familiar" to get the grade, or else choose "C" on a multiple choice test if I don't really know. I was bored in high school and most of college, and got through it all doing just about that much work, if at all. So I am kinda lax on the testing part, and feel positive for people that have my same "disability".
Today it is all about being creative to build what people want, and being able to communicate your creativity in a positive way. We need more welders and less lawyers, but those people that build things and that can make it all so entertaining, like Bob Vila's "This Old House", or Bob Ross and his painting shows, these people will lead the world. I love something that is real entertainment where you learn something too. Imagine a world where "Pewdiepie" is teaching calculus and advanced engineering, and the kids love it and understand it. I think that is the future, where all of the entertainment is something useful.
Have a great day, and thanks for watching the video. John Hurt
So although a 3v dome has three different strut lengths, it still only utilizes two different triangles, correct?
That is correct.
www.ziptiedomes.com/geodesic-dome-calculators/3v-geodesic-dome-calculator.htm#domepanels
Thanks for watching the video.
John Hurt
I am using autocad 3D, can you please demonstrate how to join the struts in 3D, in 2V, 3V, 4V, 5V, 6V, 7V, 8V and 9V.
I don't know anything about autocad. Otherwise, thanks for watching. John Hurt
Very good video and I liked the explanation. However, at 7:00 how can a sum of all angles be more than 180 degrees? It should be three times 60 degrees. I understand that the dome is curved but a single triangle is still a strait plane and it's not curved. It doesn't make sense to me. :/
Triangles on a sphere are "non-Euclidian" geometry and don't follow the same rules as normal triangles. Think about a line drawn around the equator of a globe, divided into 3 equal segments, with a vertex between each segment. The angles at the vertex would be 180 degree between each of the lines. Move the triangle closer to the North Pole, and the angles start to approach 60 degrees each, but they never reach 60 degrees in spherical geometry.
This is hard to visualize and understand, is the reason why Walther Bauersfeld, the lead engineer at Zeiss where they make curved lenses, was the first person to design a geodesic dome - by tessellating triangles using spherical geometry - which is absolutely brilliant.
Thanks for watching the video.
John
Obrigado pela explanação...por favor faça uma explanação dos grampos para as conexões acompanharem as curvaturas....
Nosso conector de dome geodésico está neste link:
th-cam.com/video/v_NnY_yYwuc/w-d-xo.html
Obrigado por assistir ao vídeo.
John Hurt
Fantastic explanation!
Thanks for watching the video. John Hurt
Thank you for the clear explanation and documentation. Simply elegant solution to a single person build.I understand everything stated but what would be the downfall to using poles all the same length with your hub design? Is it just going to be less spherical with the asset of being even simpler?
The struts need to be cut to the correct lengths. Otherwise, the struts may not meet up or fit at the hubs. Thanks for your comment. John Hurt
I see aluminum dome roofs being used on storage tanks and they seem to follow the geodesic principal. However, on these domes all the Node Points have six connections - so how can you determine the Frequency?
That may be a different type of geometry, as it is not a full dome or half sphere. Thanks for watching the video. John Hurt
Excellent explanation
Thanks, I really appreciate your comments. John Hurt
great explanatory video..:) a Que: Can we make a big dome with only equilateral triangles, may be with 2ft sides etc., thank you
I am not sure how to do that. But thanks for watching the video. John Hurt
I caught that you multiply by 1.2 to go from B (main equilateral triangle) to A, but what would be the value to go from B to C, B to D, etc?
Also, in 1v, the angle between faces is acos(sqrt(5) / 3). How does that evolve in a geodesic dome for2v, 3v, etc.?
Thank you for your answers.
We use the chord factors to multiply the radius to get the length of the chords/struts. The chord factors are located on the right of each dome calculator, like this one:
www.ziptiedomes.com/geodesic-dome-calculators/2v-geodesic-dome-calculator.htm
For the 1v, the struts are all the same length. Not sure I can answer the last question you have. Have a great day. John Hurt
Is there a maximum amount of vertices that can be used to build a dome ?
There is a maximum number of vertices for each frequency. If you increase the frequency, the number of vertices increases. So there is no real maximum to the frequency or number of vertices, but realistically, around 6v is the greatest frequency most people use.
Thanks for watching the video.
John
You lost me at 360 degrees divided by 5... at 7:11 I see a triangle that should have a total sum of edges 180 degrees however 72x3 = 216 degrees. Could this have anything to do with that the image at 7:11 on the dome is not actually flat??? But I cant see how that is related exactly.
Yes, the dome is not flat, so you can't use Euclidian geometry, so no triangle can have a total sum of 180 degrees in spherical geometry. Thanks for watching the video. John Hurt
@@ZipTieDomes awsome thanks a lot for that info. Cheers.
Dobre , transparent, wyjaśnione, dzięki
Dzięki za oglądanie!
@@ZipTieDomes wow, Ty znasz polski język???
@@janqiraga1753 translate.google.com/
Thanks, John Hurt
just curious and perhaps I missed it: What are the benefits to higher frequencies ? Strength ? Is there a standard formula for calculating the increase in strength between frequencies ?
A higher frequency with more triangles lets you build a larger dome while keeping the struts to a reasonable length. Most DIY domes are built from PVC or EMT conduit, and you don't want your struts to be over 5' in length with these materials. So with 5' struts, a 2v will create a 16' diameter dome, a 3v for a 25' dome, and a 4v for a 32' dome. The strength is really more dependent on the strut materials and hub design, so there is no easy formula for calculating an increase in strength for a higher frequency. If you want to know how strong something is, then build it and test it. The results from actual testing have blown a lot of formulas out of the water. Thank you for your comments. John Hurt
Joe, this might help...
th-cam.com/video/TqxarO-5igc/w-d-xo.html
How do you calculate the angle that the struts make with the hub ? I mean since each hub with 5 or 6 spokes is not flat and is not a flat plane, how does one calculate the angle the struts make with the hub for 2v, 3v, 4v, etc domes?
The axial angles are different for every frequency, and to be precise, the axial angles are different for every strut length in the same dome frequency. With dome construction made from hubs and struts, you only need to consider the length of the struts, for as the dome comes together, the correct axial angles are achieved when the struts are connected to the hubs. With geodesic dome panel construction where each triangle is a complete panel, and you are not using hubs and struts, then the axial angles so that the panels will fit together are very important. For geodesic domes made from panels, please look at Paul Robinson's Geo-Dome UK site, he has a lot of information about the axial angles for panel construction.
geo-dome.co.uk/
When you said, the outer struts are 88% shorter than the inner struts... 88% is approximate correct?
Yes, and just for a 2v dome.
Hi there,
It was pretty cool I must admit.
How did u calculate the length & angles of the triangles for a desired diameter? I want to make a 5v geodesic, 500mm & a 300mm diameter balls, how do I calculate the triangles? Please do reply...
We have several geodesic dome calculators at this link: www.ziptiedomes.com/geodesic-dome-calculators/geodesic-dome-calculator-index.htm
Here is a video on how to use the calculators:
th-cam.com/video/hH21jpyJzlo/w-d-xo.html
Thanks, John Hurt
Hello! I intend to build a 6V dome with wooden triangles. how do I determine the angle of the outer walls of this triangle?
That is not an easy answer. Email me and we can discuss this. John Hurt
Great explanation! Thank you! I saw that you have a calculator on your website similar to the acidome one. I didn't see, however, an option to calculate the bottom upright strut length variance in order to "level" out the bottom plane of say, a 5/8 3v dome. Did I miss it? If it isn't there, it would be a welcome addition. :)
Brian, Thanks for watching the video. On the 3v and 5v domes, the base is not perfectly flat. For a 25' wide 3v dome, there is around a 2" slight deviation in the bottom struts from a perfectly flat base. This is significant when you are using flat panel construction, but for hub and struts made from PVC, they will flex and the deviation will not be noticeable. You can build a "Kruschke dome" that is 3v with a flat base, but it requires 4 different strut lengths, and for what we do with our domes, the added complexity is just not worth it. But you do have a good point. I am working on my dome calculators this week and will look at adding a 3v Kruschke dome calculator for anyone that needs to use it.
Thanks again for watching the video.
John Hurt
@@ZipTieDomes I love your work John. Your 'Krapps Last Tape' was fantastic and as for The Elephant Man, Alien, Watership Down...just, bravo maestro. I was saddened to hear of your demise. I'm glad you're still keeping yourself busy with the old geodesic explainingment. Quick question; in the video where you explain the 6v dome equating to 6 edges, there are five arrows pointing to 5 new points, and so forth on down, I don't quite follow, can you clarify? Thanks and regards.
Werner Herzog.
@@sweatshopjesus Did you ever see "Werner Herzog Eats His Shoe"?. To tessellate the icosahedron face into 36 different tiles, the edge of the icosahedron would have to be broken into 6 segments - with 5 breaking points - with each point lifted to the edge of the sphere to create the geodesic dome.
You ought to have asked me how I came back to life, now that is a real story.
Great teacher god bless you
Thanks!
With a 6 v frequency dome domerama indicate a particular strut near the pentagon is an A strut this doesn’t make sense it should be a C strut can you help ? I am designing a twin wall 6v 5 metre radius dome centre, outer skin 5.1 metre and 4.9 metre inner skin. This produces a dome with a cavity. Regards Michael
The letters on the different calculators may be different, but the chord factors are the same. Look at the chord factors and match against the assembly diagram. You are welcome to use just the Domerama calculator - they are very accurate. The same dome mathematician that checked out the Domerama calculators checked the Zip Tie Dome calculators for accuracy Both sets of calculators use the same dome formulas. So either set of calculators will work. Stay with one or the other to be consistent. The Zip Tie Domes calculators are set up so that the red struts are always the shortest, and the blue struts are the longest. That could be throwing you a curve ball. I hope this information is helpful. Thanks for watching the video. John Hurt
Thanks. I feel like I took a short geometry class. had to stretch out old muscles to grasp. I have no idea why youtube suggested this video tho lol
Thanks for watching the video. How TH-cam does what it does... that would be a good video too. John Hurt
Thanks for your excellent explanation
Thanks!
I would like to correct a mis-reading. The letter you are calling "v" is actually the Greek letter ν ("nu") which looks like the Roman alphabet "v". In physics and engineering, nu is the variable used to represent frequency. Google "What Greek letter stands for frequency", and you will see that in engineering and physics, the Greek letter ν (nu) is used, just as θ (theta) is typically used as the variable that stands for angles.
You are right, it is "nu" but everyone calls it "v".
Thanks,
John Hurt
Ohh ! Great explanation.
what is the meaning of 3V 5/8 dome or 3V 5/9 dome??
The denominator (8 or 9) refers to the number of tiers of triangles to make a full sphere. The numerator refers to the number of tiers in the dome. That is not a perfect explanation, but close.
Excellent explanation. Thank you.
Thanks!
very clear explanation
"The scales have been removed from my eyes" Thank you.
Thanks for watching the video! John Hurt
Благодарю.
Интересное видео.
Thanks!
Thanks for this explanation.
i am glad you liked the video. John Hurt
Greetings... I am Roel Vera Cruz. I am learning about geodesic dome. I am planning to use this design in my home... The layout of my home is octagonal. The radius is 16 feet. Do you have any recommendations on what frequency shall I use? The location of my home is in the eastern part of the Philippines where the typhoons usually passes from the Pacific. Thank you very much...
Roel,
You might consider an Octahedral Dome:
www.ziptiedomes.com/geodesic-dome-calculators/geodesic-dome-calculator-index.htm#oct
Thanks,
John Hurt
Thank you very much...
Thank you for this lesson!
Thanks for watching the video. John Hurt
Note, there is actually an infinite number of ways you can cover a sphere with triangles. For example, I just designed a dome with a similar number of triangles as a V3 icosahedron-based dome, but it has 18 base triangles and a hexagon on top with 6 pentagons spaced around the side.
That is very interesting. Perhaps you can put your work on TH-cam some day. Thank you for your comment. John Hurt
@@ZipTieDomes I developed the simpler version out of the desire to make a very large greenhouse. By basing it on a top hexagon, the sides can be flattened and multiple domes can be joined in a hexagon pattern. From the inside, it would look like an array of posts supporting the roof.
@@ZipTieDomes
The tetra-hz is similar in that it can be used in multiples. Fairly basic with only 30 struts. The base triangles are perfectly vertical which is handy. Small ones make great cloches . th-cam.com/video/kJteHbJV5eM/w-d-xo.html
I learned much. Thank You!
Thanks for watching the video. John Hurt
Muchas gracias!!! Excelente explicación,...
Thanks!
THANKS really good explanation!
Thanks!
So helpful! Thank you!
Thanks!
The more v the stronger dome?
It depends. If you have a really high frequency, the pentagons and hexagons are "flatter" and not as strong to prevent a hub inversion as the lower frequencies. But the higher frequencies let us us a shorter strut, which is stronger. Geodesic Domes are good up to a certain size, and then become complicated in order to keep their strength. Thanks for watching. John Hurt
Thanks, well done & to the point
Thanks, I appreciate your comment. John Hurt
What kind of cost would you be looking at to cover a 2400 square foot house, roughly 40x40x35 foot footprint
The epcot ball what Frequency is?
It is a Class 2 sphere 8 frequency that is further subdivided by 3 isosceles triangles in each face. More information is here:
en.wikipedia.org/wiki/Spaceship_Earth_(Epcot)#Structure
Thank you for your comments. That is a good question. John Hurt
What if you don’t have any struts, any you... 3D Print in concrete / Air-Crete in what would be called vase mode
That is an interesting concept. For concrete domes, look at the techniques used by Monolithic Domes in Italy, Texas.
Zip Tie Domes got any links
@@davidprock904
th-cam.com/video/N18HcPfKv1E/w-d-xo.html
Awesome vid man!
Thanks for your comments. John Hurt
I thought the V stood for vector i.e. how many struts meet at the same point, but the v stands for vertex or vertices. Thanks.
Paul, Yes the letter "v" stands for frequency. Thanks for your comment. John Hurt
Can you calculate my hometown's zoo geodesic "desert dome's'" frequency based on this url page of photographs ? My vision and perception is not as keen as in my younger days, and I can't see the forest for the trees. I am not able to perceive the 5-way connectors due to the multiplicity of of 6-way connectors :) - www.flickr.com/photos/41978639@N03/15793038276/
Here are more images of same dome in different light - www.searchencrypt.com/images?eq=CsFzNdOw2f29jp0hBWxwK5r4bFxaznByu%2FKBKRXfSTfBJmgHf3NlMUFg7SJaTly3
It looks like an 8v or 8 frequency dome. Look through the windows to see the struts on the back side of the dome. There are two 5-way connections visible, with what appears to be 8 struts between them. Thanks, John Hurt
Yes, "v" stands for Frequency, which is how many times the icosahedron triangle is divided.
Thank you!
What software did you use to render the dome at the beginning of this video?
To render the dome, I use Paint.net. I take an original dome drawing, then overlay it with the correct color struts and put the alphabetic labels on each strut. To make the animation, I erase one strut at a time, make a .jpg file for each change, then continue until all are erased. Then reverse the order of the .jpg files to make it build in Video Studio. it sounds like a lot of work, but I have shortcuts that I use. Thanks for watching the video. John Hurt
Thank you. I had hoped to find a software program to render the dome itself.
@@stevenrutledge - Look at this video by Paul Robinson, who will show you how to draw a dome in Sketchup: th-cam.com/video/bR2BL2C8fvo/w-d-xo.html
Very good stuff friends. Love to learn. I'm a rammed earth builder. I'm trying to figure out how to tie them together. Ideas?
I am working on building a dome within a dome, with both covered in fiberglass mesh with latex cement - as a form for aircrete or hempcrete put in between the two domes. It will probably be next spring before I can make a video. Rammed earth is really cool too. Maybe you can do rammed earth for the vertical section of the dome at the bottom, and go over the top of the dome with air crete or hemp crete. Keep going, and try something new every few days, and it will pay off. Thanks for watching the video. John Hurt
@@ZipTieDomes How is the dome within a dome coming along? It's been a while since you posted anything. I am very interested! What size did you start off with? Did you do bamboo or PVC?
Did you cover one in see through material and the other in a solid material? Did you insulate either one? Curiosity is getting to me! I am weighting the realistic fantasy of building a geodesic dwelling or a pyramid one. I am wondering if their is any frequency in vibration changes when you build the geodesic homes. Comparing it to a pyramid. 🤔
Thanks for your videos. I do hope you do more!
Suzanne 🤠
@@suzanneweitzel8969 I have a prototype of the dome inside a dome, but now I am trying to finish our tunnel dome assembly manuals. I am using a tunnel dome as a sheep barn this winter.
I have one dome covered in latex cement over mesh that is working very well. You can see a picture of my concrete dome at the bottom of this customer review:
www.ziptiedomes.com/customers/lenabach.htm
Thanks for checking up on me. I appreciate your comments. John Hurt
@@ZipTieDomes Fun postings! I hadn't seen these!
I am curious, if the silo domes have the same wind resistance! I currently am in the saddle of a mountain pass. First spring here I experienced 95 mile an hour guts! I was to be in an easter parade the next day. It was canceled! A lot of wind damage all over cochise county! One for the records! It is common to get 45-60 mile an hour spring winds. It does get tense at times. That's the reason for asking about the silo looking domes for wind resistance. Also, how would I ground one for lightning? You have one shown made from #5 (I think) rebar. Do the others need grounding? For an actual all season long term dwelling? Or can you link me up to your postings on this of kind question! Thank you for your replies! Suzanne 🤠
@@suzanneweitzel8969 A customer said that one of our domes, not a silo, survived Hurricane Ian. Put 2' long rebar stakes in every hub that is on the ground. You can also tie the dome to the ground with a ground anchoring system and steel cable. If the lip of the dome comes off the ground, it will catch air and become a parachute - and nothing can hold it down at that point. But the dome itself won't have a problem with wind as it is round.
The dome is made from PVC plastic, and does not conduct electricity, so you won't need lightening protection. Most wooden houses have no lightening protection, and are rarely hit by lightening, while large steel and concrete buildings all have lightening rods on the top to reduce the electric potential. Thanks for your comments. John
Tôi là người việt nam.
Nay mới biết đến kênh này của ông.
Tôi rất thích những bài học từ ông .
Chúc ông và gia đình gặp nhiều điều tốt lành.
Ông có thể cho tôi i mai của ông được không ạ.
Tôi muốn tìm hiểu về nghành học này.
Nhiều phước lành cho bạn và gia đình của bạn.
John Hurt
Спасибо большое теперь понятно что это такое.
Спасибо за просмотр видео. John Hurt
What no duct tape or zip ties can’t see it lasting
We use stainless steel zip ties with a ball bearing, so that they will last forever. Thanks for watching the video.
От души братан, я все понял.
Спасибо, брат, я ценю твое сердце и понимание. Благословения вам и вашей семье. Джон Хурт
Thank you Brother, I appreciate your heart and understanding. Blessings to you and your family. John Hurt
Wonderful
i don't understand a need for this terminology and I haven't noticed it in geometry. I seem to find it only connected to amateur buildings and companies making commercial domes. All these "higher" frequency domes are actual polyhedrons with a mathematical name.
Thanks for watching the video. John Hurt
Very helpful!!!
Thanks, I appreciate your comment. John Hurt
1:54 those struts don't look all the same length.
It is a perspective view of a 3d object presented on a 2v screen. Thanks for watching the video.
John Hurt
Thank you! :-)
Thanks for watching. John Hurt
Ok. Where are the Zip Ties?
This video is for designing domes in general, not just zip ties domes. But if you look in the upper right corner of the video, you might just see one or two. Thanks for watching the video. John Hurt
WHAT "FREQUENCY" WOULD ONE CALL , -- A TYPICAL AMERICAN TEEPEE ? & DOES THEIR "STRENTH" COMPARE ?
A teepee is different from a dome, and is not subdivided into frequencies. A teepee is strong, and like anything else, it really depends on how you build it as to how much strength it has. Thanks for watching the videos. John Hurt
While interesting, it's pretty old stuff. What is REALLY needed, is more automated, detailed explanation of the ENGINEERING. Most engineers just roll their eyes at domes, and the ones who master the calcs, charge a fortune. After all these years, it really can't be that hard.
Ray,
Most people watching TH-cam are not engineers. If they were, I would have started the video with how to determine the chord factors using spherical geometry. Using just the chord factors, I wrote all of the dome calculators in Javascript at www.ziptiedomes.com/geodesic-dome-calculators/geodesic-dome-calculator-index.htm
Like you said, it really wasn't that hard, if you know how.
I talk at little bit about chord factors at 6:10 in this video: th-cam.com/video/hH21jpyJzlo/w-d-xo.html
Again, not very hard.
What is "hard" to do, is to find a new way to use a geodesic dome, instead of using it to build a spherical house that leaks. Stanford Research Institute is using our domes for radar reflectors at the Hat Creek site for the SETI project, as our domes are the only ones made entirely from plastic with no metal parts. I am also working with a university on an Ambisonic Dome th-cam.com/video/OzvZcisDq9Y/w-d-xo.html which will ultimately be combined with dome projection. th-cam.com/video/NGdUZGsOz0I/w-d-xo.html
Combining ambisonics with 360 dome projection will be the entertainment system of the future. Not that hard, but you have to be creative and think outside the flat screen and headphones. Oculus Rift has a lag that makes me seasick, and the VR goggle experience cannot be shared with a friend. Geodesic domes for family home entertainment are much more enjoyable than goggles, as you don't lose your sense of self.
One of my favorite videos on dome engineering that you may find interesting is by Paul Robinson at this link: th-cam.com/video/TqxarO-5igc/w-d-xo.html
Thank you for your comment.
John Hurt
@@ZipTieDomes This video makes me think that the Cinesphere in Toronto's Ontario Place is not an actual geodesic dome. It looks to me like the spherical effect has been achieved by removing struts as the shape reaches its top. Correct?
@@ronjenkins4257 Here is a link to the Wikipedia article on the Cinesphere: en.wikipedia.org/wiki/Cinesphere
The Cinesphere is not a "triodetic dome", but is using triodetic hubs as connectors: www.setareh.arch.vt.edu/safas/010_system_08_triodetic.html
A standard geodesic dome has a 5-way hub every 72 degrees around the dome, where the corners of the original icosahedron occur. I can see no 5-way connections on this dome, rather each level of the horizontal struts appear to be perfectly parallel. This makes me believe that the strut lengths have been computer generated and were not developed from chord factors. A computer generated dome would most likely create more unique strut lengths and make the dome more difficult to build. But a dome like this, with the beautiful horizontal strut lines that have been produced would be perfect solution for an architect like Eberhard Zeidler, although it would be nearly impossible for the rest of us to even think about. A very good design indeed. Thank you for the information. John Hurt
Bom vídeo!
Obrigado!
Super
Thanks!
cool thanks
Thanks for the comment.
Thanks for these great explanations! On a side note, you sound like you must come from the same part of USA as Bill Clinton.
Yea buddy, I'm from Tennessee, just a stone's throw away from Arkansas and the Clintons. And a lot of people here in Tennessee do throw stones whenever the Clintons are in town - usually at each other. Al Gore is also from Tennessee. If Al Gore had won his home state of Tennessee in 2000, he would have been president. I guess being around the Clintons rubbed off on him, since he could not win his home state.
My mother in law was from Georgia, and she talked as slow as molasses. The way we speak down here is an art form masquerading as communication. Thanks for your comments and for watching the video.
3:18 That's obviously NOT an equilateral triangle.
It is a perspective view from an angle. Thanks for watching the video. John Hurt
🙏👍
Thanks!
대한 민국
코리아
한국
조선어로 번역을 해 주실 순 없나요? ㅎㅎㅎ
아니여도....쯥쯥...대충 이해 노력...힘들어ㅋㅋㅋ
번역기로 사용할 개똥도 찾고 싶을 때는 없습니다.
But people are not really making geodesic domes at all the flat surface they are making is very 2 dimensional > geodesic domes are made of the tetrahedron NOT triangles >>>> buckminster fuller made geodesic domes with tetrahedrons
A tetrahedron is made up of triangles, all at different angles. Thanks for watching the video. John Hurt
Frequency's is a pulse. . Your using the new age jibberish. Oh my
Frequency is the number of times something happens over a given period, or to an object. In this case, it is the number of times a triangular section of an icosahedron has been tessellated into smaller triangles. Yes, it does sound like jibberish as most people are not familiar with this technique. Thanks for watching the video. John Hurt
University does not provide this good education
Thanks for your comments. John