Introduction to an Equatorial Sundial
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- Опубликовано: 26 июн 2020
- A guided explanation of how the simplest sundial works and how to accurately position it anywhere in the world. Includes explanation of how solar time is converted to clock time.
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Other comments are DEAD ON (just like your video)... CLEAR, CONCISE, CONSISTENT... this is not only an AMAZINGLY well done video explaining the topic, it followed the 3 cardinal rules that BEG FOR - be clear (tell, show, demonstrate), be concise (nothing extraneous, especially annoying music), and consistent (linear logic and demonstration and graphics).
The WHAT and the WHY are both explained so well that (while I'd love to have a download pdf link) I understand it enough to be able to replicate it with a little bit of thought (and adjustment to the base to compensate for the local angle ~32° instead of your 43°).
Thank you again... the best video yet on the what and why... time to play with it till I have my How!
This is so well explained. Everything from the props to the graphics is clear and easily understood. Thank you for taking the time to do this.
Thank you for your comment! These were fun to do in the hopes that it would help people understand the workings of a sundial.
I can't figure out why my sundial stops working at night and starts working in the morning again....
It runs on solar power. Think about it.
You definitely need a moon dial bro
It goes to sleep. Duh 🙄
Thank you so much for explaining this so clearly.
This is so well done. I'm here with a weeks worth of rain making a project. This has been very informative.
This was a really great video, I'm surprised that it's your first! It had all the information I was looking for explained thoroughly and clearly. Thank you!
Thanks, I think that I need to speed the videos up a bit.
thank you so much! you save life, my work, and my college diploma!
HA! Then my life's purpose is complete! Glad that it was helpful.
Thanks 🙏🏼 Simplest Explaination and the Best. Easily comprehensible.
Wow! I never saw the rotatable saddle to make corrections between solar and standard time before!!!!! Soooo cool
This is so well explained. Keep up the good work
Great job for your first video. Excellent explanation and demonstration. Especially how to make corrects for local time variations.
Glad it was helpful!
Excellent video! Congratulations! Just one thing: longitude correction for time zone is 13.25 minutes. The symbol for minutes of time is "m", the symbol for minutes of arc is " ' ". Two different things. Therefore, on the sundial it should be "-13.25 m".
Time => h, m, s. Arcs (sexagesimal) => º ' ''
Congratulations for your work!🔭🔭🔭🔭🔭🔭👏👏👏👏👏👏
Excellent introduction to circular hours and minutes and their bases in natural reality.
Much love
This is an excellent introduction. Thank you so much and greetings from Egypt
Glad it was helpful!
AMAZING woodwork!!!
Great video! Deserves more view!
Great job on the video, it was very well organized and easy to follow as well as provided me with a ton of Great ideas. I am considering machining something similar from Stainless Steel. Take Care.
Thanks, have fun with your project.
Very nice good teaching. Good job. Thanks.
Great video. Thanks.
I have a question have you ever experimented marking the tip of the shadows the pointer makes throughout the course of the day?
And some people still claim the Earth is flat. Great video! Thank you
About the angles. How'd u set them? I want to build on but I live on the equator.
Hi Roger. This is an excellent video. One of the best I have seen explaining the Equatorial Sundial. Can I have your permission to mirror it on my channel with full credit to you for the video.
Thanks.
Yes, please feel free to use it and I appreciate the video credit. Glad that you thought it useful. This was my very first video and hopefully I'm improving.
How are you creating these sundials? The engraving and wood is very nice. Can they hold up outdoors?
They are made using a CNC machine. Engraving and cutting Baltic birch plywood for assembly. These are demonstration sundials and would not hold up to outdoor exposure. With the CNC I can also engrave slate for outdoor use.
sweet, where can I get plans for this?
Great video. Do you suppose that Equatorial time is more natural for our body clocks, or do you think the difference is negligible?
Clock time, depending on where you live, can be very different than sun time. As much as 2 hours off or even more depending again on where you live and within which time zone. All of China for instance is one time zone, their clock and sun time could be 4-5 hours different; I don't know how they deal with it across that country. I personally think that sun based time is closer to a natural rhythm of day and night.
How did you make those perfect numbers ?
Could a notch be cut in the center of the gnoman to allow a sliver of light through for more accurate time readings?
Great videi
Superb
How substantial is the drift from day to day? How much time would you lose or gain in say a month?
Hmmm..... My Son and I learned what an Equatorial Sun Dial is today😃 Thank you for teaching us both time master🕰️
Ha, thanks. One of my friends calls me the Time Lord, like in the Dr. Who sci-fi series:)
@@rogerdignard5438 How clever. Time Lord is also a very fitting Title for you. You taught us so well for a moment we felt like Time Lord's/ Time Masters too. I even drew the equation of time that you showed us , and have been pondering upon it. long story short, Thank You, You are Appreciated.
@@rogerdignard5438 I Have Pondered Further upon the Equation of Time, and Now Know That I Have Mastery Over My Own Time 🕰️ Look At That, I Am A Time Master Too👁️ Once Again, Thank You For Sharing Your Wisdom⏲️
nice video
On this sundial, the distance between each hour is 15 degrees. On my standard 'flat' sundial, I found a website that gave the angles between the hours and they were not all the same. Is that because of the differences in mine being flat with and your dial being tilted?
It's because they are two different types of sundials. Your sundial is a horizontal sundial, in which the dial is horizontal to the ground, usually lying on the ground. The angle of the gnomon is equal to its latitude and the gnomon is parallel to the earth's axis. In the equatorial sundial, the dial is parallel to the equator.
Angle of latitude for Melbourne is -37degrees how’d I align ?
Iam in namibia what is the angles
For a monolithic dial
Good information
Thanks, working on getting better at it.
I like equatorial sundial
The bigger the more you can add like seconds or even adding lunar to the dial and making it a time piece of a calendar etc etc. ...
So , if set correctly a sundial will always display solar noon accurately?
I think it goes beyond that. It should always solar TIME accurately. The sun don't lie.
Do you sell this sundial? If so how can I purchase it?
Why isn't India following Daylight Savings Time since it is not on the equator?
The decision to use Daylight Saving Time is a political one. Most of India is relatively close to the equator so there isn't a dramatic seasonal shift in daylight hours. If it were considered for northern India then it would only confuse the rest of the country.
Legal
hum... i have several 24 inch saw blades that would make great sun dials... and one 58 inch saw blade....
Why +60 in sundial
Time is hard work 😂 I came here looking to buy a sundial. Or create one in my backyard. Now, I’m not too sure about that.
It is not as easy as you think to understand how a sundial works. There is true north and there is magnetic north. I would have thought the correct elevation of the gnomon could be found by aiming it directly at the sun.
We need a time-lapse of Equatorial Sundial on Southern Hemisphere, and then ask Flat Earthers to explain it.
They would come up with one just like Trumptards come up with reasons for supporting a guy who tried to overthrow the gov't.
I'm lost.
Earth’s flat, the dial doesn’t spin with the shadow does it
Too complicated. I have to use dictionary to look up your big scientific words. Thumbs down
He did about as good a job as he could. Some things cannot be explained using fourth grade language. His diagrams should have helped.
the sun rotates above earth earth is not a spinning ball it is stationary
😂😂😂
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