I have to sit around all day and hope the sun is shining so I can mark the lines on. Funnily enough I'm at 43° south so this is perfect. Maybe over time I'll understand this better. I built an artillery sundial a few years back but I think it got blown around a bit in the wind so I'm not sure how accurate it is. Anyhow. Maybe getting smarter. Thanks again.
QUESTIONS: What is the benefit of a style angled toward the north star Vs just a simple vertical rod? With a simple vertical stick, the number will be in a counter clockwise order, but other than that I don't see any problem.
What if you live where its 41° East? Would you place the sundial facing North or East? I'm asking because I had to make a sundial in class and check the time on it in the morning and later in the afternoon.
With the velocity of the magnetic pole, shouldn't there now be a need to have the ability to adjust the face of a horizontal sundial to continue to accurately point to the magnetic pole?
The key to a proper sundial is not to point it at the magnetic pole. You must align it with the geographic pole. The magnetic pole will wander but geographic is considered constant for our purposes (ignoring the wobble of the earth on its axis over the millennia)
I assume that, if one had a dowel or pipe as the gnomon, as long as one mounted that on a wedge that is your latitude, this would also work for a horizontal sundial?
Yes, any properly inclined surface would work, sometimes the solutions are quite creative. On this type of dial I like having a crisp edge to cast the shadow for accuracy, not something round like a pipe. Keep in mind that the linework for the hours does have to be latitude specific as well.
Very nice video, As you said in another video that all dials hour lines could be derived from the Equitorial Sundial and you also displayed that in case of Polar and East-West Sundials. Would you please display how hour lines could be drawn for a Horizantal Sundial with the help of an Equitorial Sundial Graphically. Thanks in advance!
I'll have to do a video explaining that. The conversion for the horizontal dial is not as easy as the others. It can be done mathematically or graphically. Thank you for the comment.
I don't want to keep you from doing another video, but Junaid, if you can get a used copy of Albert Waugh's "Sundials, their theory and construction", the way to adjust the hour lines on a horizontal sundial are explained in that book.✌
I can say it's one video with many details, thank you for this video, explained very well!
Beautifully and concisely pieces together. Well done! Thank you!
I didn't realize how much was involved. Thank you for the video
Thankyou for this!!! There is just no end of Cool Stuff in this World man!!
Never lose your wonder people.
Thank you for making this.
Thanks, I plan on doing some more when I can film without snow on the deck!
Place the dial on a hot plate to melt the snow.
An excellent video, many thanks.
I had recently made a sundial that wasn't working correctly and I suspected the gnomon width to be the problem. Thanks for confirming that.
Excellent !
Awesome vid! Thanks for explaining the importance of magnetic N v Geo N. As well as that commercial sundials won’t work
Great video. The graphics really helped.
this is awesome!!!
Fantastic! This will become a homeschool project.
Very Helpful, thank you. I took notes to use for the STEM class I will be conducting in a couple months.
Excellent explanation! Thanks, I have subscribed to your youtube videos.
Very nice good job. Thanks
감사합니다. 많은 도움 되었습니다. 덕분 입니다.
Thanks for the info...so to be clear...what thickness should i use for a wooden one?
Thank you sir !
Have you made these yourself? Do you have a CNC machine?
Great video btw :)
I have to sit around all day and hope the sun is shining so I can mark the lines on. Funnily enough I'm at 43° south so this is perfect. Maybe over time I'll understand this better. I built an artillery sundial a few years back but I think it got blown around a bit in the wind so I'm not sure how accurate it is. Anyhow. Maybe getting smarter. Thanks again.
Man I feel stupid
I have much to learn....
QUESTIONS:
What is the benefit of a style angled toward the north star Vs just a simple vertical rod?
With a simple vertical stick, the number will be in a counter clockwise order, but other than that I don't see any problem.
Should we align to geographic south in southern hemisphere ?
What if you live where its 41° East? Would you place the sundial facing North or East? I'm asking because I had to make a sundial in class and check the time on it in the morning and later in the afternoon.
With the velocity of the magnetic pole, shouldn't there now be a need to have the ability to adjust the face of a horizontal sundial to continue to accurately point to the magnetic pole?
The key to a proper sundial is not to point it at the magnetic pole. You must align it with the geographic pole. The magnetic pole will wander but geographic is considered constant for our purposes (ignoring the wobble of the earth on its axis over the millennia)
I assume that, if one had a dowel or pipe as the gnomon, as long as one mounted that on a wedge that is your latitude, this would also work for a horizontal sundial?
Yes, any properly inclined surface would work, sometimes the solutions are quite creative. On this type of dial I like having a crisp edge to cast the shadow for accuracy, not something round like a pipe. Keep in mind that the linework for the hours does have to be latitude specific as well.
Good video
Glad you enjoyed
Shouldn't the longer edge of the gnomon be at 43 degrees to the horizontal just like if it had been a pole? Why is the base at 43 degrees?
Because you need the gnomon’s tilt depending on your latitude.
Excellent information. Are you going to make some new videos?
Yes, hopefully in a couple months as I have other projects underway.
Very nice video, As you said in another video that all dials hour lines could be derived from the Equitorial Sundial and you also displayed that in case of Polar and East-West Sundials. Would you please display how hour lines could be drawn for a Horizantal Sundial with the help of an Equitorial Sundial Graphically. Thanks in advance!
I'll have to do a video explaining that. The conversion for the horizontal dial is not as easy as the others. It can be done mathematically or graphically. Thank you for the comment.
I don't want to keep you from doing another video, but Junaid, if you can get a used copy of Albert Waugh's "Sundials, their theory and construction", the way to adjust the hour lines on a horizontal sundial are explained in that book.✌