Re: Heliochronometer card dials?
Hi All, Rather than making two shepherd's dials - one for the morning, one for the afternoon - you could divide its 360 degree circumference into two 180 degree sections, one for the morning, one for the afternoon. Then there's only one set of hour lines on each side. With a shepherd's dial you have to orientate it so that the shadow is exactly vertical. It occurs to me that one elegantway to ensure this would be to have a slit in the gnomon, like Piers Nicholson's Spot On dials. See www.sundials.co.uk Similarly with a mean timeCapuchin dial, you could mark both sides of the dial rather than mixing morning and afternoon on the same side. The simplest mean time dial I know is called a nocturnal ;-) Regards Chris - Original Message - From: fer de vries To: Gerard Hughes ; Sundial List Sent: Tuesday, October 17, 2006 8:27 PM Subject: Re: Heliochronometer card dials? Gerard, You could make a sheperd's dial. These are location specific. Attached is a picture of the scale for such a dial with correction for longitude and equation of time. It would be better if you make two, one for the morning hours and one for the afternoon hours. Red cq blue lines in the picture. Also a Capuchin dial for one latitude can be corrected for longitude and EoT but also split the pattern in two parts. Correction for daylight saving time is no more then adding new numbers to the dial. Such altitude dial will not work accurate around noon but the possibility to make them for clock time is present. Best wishes, Fer. Fer J. de Vries De Zonnewijzerkringmailto:[EMAIL PROTECTED]http://www.de-zonnewijzerkring.nl Eindhoven, Netherlandslat. 51:30 N long. 5:30 E - Original Message - From: Gerard Hughes To: Sundial List Sent: Tuesday, October 17, 2006 8:36 PM Subject: Heliochronometer card dials? Ok, so I do realize that "heliochronometer" and "card dial" are sort of mutually exclusive. I’m looking for a way to make some easy to read card dials that read in standard mean time.I work at a number of historical reenactment fairs and I’d love a quick and portable way to show people how fun sundials can be and that sundials can be accurate. I have a number of universal ring dials but they read LAT. I’d like the dial to read in mean time because initially I’d like to be able to skip the explanation of Local Apparent Time vs. Mean Time and such. I realize that altitudinal card dials are not the most accurate, but since there is no such thing as a pocket Schmoyer dial I’m looking for an alternative that offers simplicity and a hook to catch people’s interest--and I'll be using them in the summer so the sun will have some altitude for the dial to discern. *I’m considering drafting latitude, longitude and date specific Capuchin dials corrected for daylight savings and the equation of time. I realize these dials would be one offs only of use at one location at one date, but since card dials can be drafted fairly easily this seems like a reasonable way to go. Granted, one can make a "universal" Capuchin dial that compensates for latitude and the time of the year, but such a dial still reads in LAT--Perhaps I could make two rotating hour wheels that line up with the hour scale to set for daylight savings, longitude offset from the center of the time zone and the equation of time (one for am and one for pm--I don't think there is a way to make a single wheel work)I’m wondering if people have any alternate suggestions and ways to make drafting more efficient on my Adobe CS2 equipped non-Intel Mac? (that is, I don't have Delta CAD at the moment.)Thanks,Gerard*Others may think that the path of the sun is fascinating as it is and doesn’t need to be equated with mean time, but I, personally, didn’t become fascinated by dialing until I discovered all the reasons why the dials I saw in parks didn’t read clock time and I assume that others may be dismissive of sundials for similar reasons. ---https://lists.uni-koeln.de/mailman/listinfo/sundial ---https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Heliochronometer Card Dials
Sunny Day! This isn't a card dial but it is made of paper and might just get you to lunch on time. It could work for the application that Gerard Hughes spoke about. It can be adjusted for latitude, longitude and the equation of time. Unfortunately it will only work for half the year. It is an equatorial sundial and I have attached an image of the dial plates. The two plates can be printed on card stock and sealed in plastic to protect them from the weather. To give the sundial rigidity the right plate can be glued to rigid styrofoam or a piece of wood and the support then cut out to shape. The vertical gnomon is positioned at the centre of the circle. The stiff wire from a clothes hanger works well. The thinner...the better. The left plate is placed so it rotates about the gnomon. To adjust the dial plate to compensate for longitude and the EoT, a copy of the Correct-A-Dial II for your longitude would provide the corrections required. The top plate is rotated in the required direction so the sundial will read clock time. The vernier will help you to accurately correct the sundial to the nearest minute. All that is required is a stand that allows the sundial to be adjusted to the desired latitude. Happy Dialling! Carl Sabanski www.mysundial.ca Get Hooked on Gnomonics! attachment: st_sundial.jpg --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials
Peter Mayer wrote: A while back Gerard Hughes started a thread on accurate card dials: I've often thought that if I have the time, I'll write the DeltaCad code to generate the EoT adjustment for the Merchant dial. But if someone else has the leisure to do it first, I'll be the first to applaud! 'Leisure' is a good word in this context as it took me best part of a month to calculate all the tiny offsets and then convert them into separatly rotated 'verniers' for each month for my Lindi/SOL heliochronometer which is, as yet, only 80% completed after three years in the making as I keep changing my mind about the sun sighting arrangement. Clever though it is, some aspects of the original PG SOL Horometer I found somewhat clumsy. (An ugly dial with an ugly name as I believe Mr. Gibbs called it). That swivelling blunt 'arrow' pointer for longitudinal offset for example. My LindiSOL incorporates an additional central 'ring' which allows for both daylight saving AND longitudinal offset adjustment. The plate artwork is in Mac Adobe Illustrator format but I can send a PDF and jpeg of the finished plates and base if anyone is interested. Tony Moss Lindisfarne Sundials. P.S. I have heard it suggested that Pilkington only calculated the first and last of the 'vernier' line angles with equal spacing in between. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Heliochronometer card dials
Hi, A while back Gerard Hughes started a thread on accurate card dials: Ok, so I do realize that "heliochronometer" and "card dial" are sort of mutually exclusive. Im looking for a way to make some easy to read card dials that read in standard mean time. One dial which is both a heliochronometer and a card dial is that devised by Charles J. Merchant. The dial, an card equitorial dial, appears to be based on the Pilkington Gibbs Sol Horometer. It was described in Scientific American in March, 1964. I'm attaching a jpg which I hope scrapes under the wire for size. (I'll see if I'm able to convert the HTML into a pdf, if anyone desires a copy of the article) I've often thought that if I have the time, I'll write the DeltaCad code to generate the EoT adjustment for the Merchant dial. But if someone else has the leisure to do it first, I'll be the first to applaud! best wishes, Peter Mayer -- Peter Mayer Politics Department The University of Adelaide, AUSTRALIA 5005 Ph: +61 8 8303 5606 Fax : +61 8 8303 3443 e-mail: [EMAIL PROTECTED] CRICOS Provider Number 00123M --- This email message is intended only for the addressee(s) and contains information that may be confidential and/or copyright. If you are not the intended recipient please notify the sender by reply email and immediately delete this email. Use, disclosure or reproduction of this email by anyone other than the intended recipient(s) is strictly prohibited. No representation is made that this email or any attachments are free of viruses. Virus scanning is recommended and is the responsibility of the recipient. attachment: Merchant-Card_Dial3.jpg --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Heliochronometer card dials?
Ok, so I do realize that "heliochronometer" and "card dial" are sort of mutually exclusive. I’m looking for a way to make some easy to read card dials that read in standard mean time. I work at a number of historical reenactment fairs and I’d love a quick and portable way to show people how fun sundials can be and that sundials can be accurate. I have a number of universal ring dials but they read LAT. I’d like the dial to read in mean time because initially I’d like to be able to skip the explanation of Local Apparent Time vs. Mean Time and such. I realize that altitudinal card dials are not the most accurate, but since there is no such thing as a pocket Schmoyer dial I’m looking for an alternative that offers simplicity and a hook to catch people’s interest--and I'll be using them in the summer so the sun will have some altitude for the dial to discern. * I’m considering drafting latitude, longitude and date specific Capuchin dials corrected for daylight savings and the equation of time. I realize these dials would be one offs only of use at one location at one date, but since card dials can be drafted fairly easily this seems like a reasonable way to go. Granted, one can make a "universal" Capuchin dial that compensates for latitude and the time of the year, but such a dial still reads in LAT--Perhaps I could make two rotating hour wheels that line up with the hour scale to set for daylight savings, longitude offset from the center of the time zone and the equation of time (one for am and one for pm--I don't think there is a way to make a single wheel work) I’m wondering if people have any alternate suggestions and ways to make drafting more efficient on my Adobe CS2 equipped non-Intel Mac? (that is, I don't have Delta CAD at the moment.) Thanks, Gerard *Others may think that the path of the sun is fascinating as it is and doesn’t need to be equated with mean time, but I, personally, didn’t become fascinated by dialing until I discovered all the reasons why the dials I saw in parks didn’t read clock time and I assume that others may be dismissive of sundials for similar reasons. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
Gerard, You could make a sheperd's dial. These are location specific. Attached is a picture of the scale for such a dial with correction for longitude and equation of time. It would be better if you make two, one for the morning hours and one for the afternoon hours. Red cq blue lines in the picture. Also a Capuchin dial for one latitude can be corrected for longitude and EoT but also split the pattern in two parts. Correction for daylight saving time is no more then adding new numbers to the dial. Such altitude dial will not work accurate around noon but the possibility to make them for clock time is present. Best wishes, Fer. Fer J. de Vries De Zonnewijzerkringmailto:[EMAIL PROTECTED]http://www.de-zonnewijzerkring.nl Eindhoven, Netherlandslat. 51:30 N long. 5:30 E - Original Message - From: Gerard Hughes To: Sundial List Sent: Tuesday, October 17, 2006 8:36 PM Subject: Heliochronometer card dials? Ok, so I do realize that "heliochronometer" and "card dial" are sort of mutually exclusive. I’m looking for a way to make some easy to read card dials that read in standard mean time.I work at a number of historical reenactment fairs and I’d love a quick and portable way to show people how fun sundials can be and that sundials can be accurate. I have a number of universal ring dials but they read LAT. I’d like the dial to read in mean time because initially I’d like to be able to skip the explanation of Local Apparent Time vs. Mean Time and such. I realize that altitudinal card dials are not the most accurate, but since there is no such thing as a pocket Schmoyer dial I’m looking for an alternative that offers simplicity and a hook to catch people’s interest--and I'll be using them in the summer so the sun will have some altitude for the dial to discern. *I’m considering drafting latitude, longitude and date specific Capuchin dials corrected for daylight savings and the equation of time. I realize these dials would be one offs only of use at one location at one date, but since card dials can be drafted fairly easily this seems like a reasonable way to go. Granted, one can make a "universal" Capuchin dial that compensates for latitude and the time of the year, but such a dial still reads in LAT--Perhaps I could make two rotating hour wheels that line up with the hour scale to set for daylight savings, longitude offset from the center of the time zone and the equation of time (one for am and one for pm--I don't think there is a way to make a single wheel work)I’m wondering if people have any alternate suggestions and ways to make drafting more efficient on my Adobe CS2 equipped non-Intel Mac? (that is, I don't have Delta CAD at the moment.)Thanks,Gerard*Others may think that the path of the sun is fascinating as it is and doesn’t need to be equated with mean time, but I, personally, didn’t become fascinated by dialing until I discovered all the reasons why the dials I saw in parks didn’t read clock time and I assume that others may be dismissive of sundials for similar reasons. ---https://lists.uni-koeln.de/mailman/listinfo/sundial Image1.gif Description: GIF image --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
Actually, I thought "historical reenactment" and "standard mean time" are sort of mutually exclusive. Most mean time dials have uniform 15 degree hour spacing, so setting zone time, daylight saving, or whatever, is just a matter of rotating the dial. Of these, the most portable form is the Universal Equatorial (or Equinoctial) Ring Dial. To read mean time, itsequatorial ring must be made to rotate: most do not. Not exactly a card dial, but very portable andthe best I can think of. Regards Chris - Original Message - From: Gerard Hughes To: Sundial List Sent: Tuesday, October 17, 2006 7:36 PM Subject: Heliochronometer card dials? Ok, so I do realize that "heliochronometer" and "card dial" are sort of mutually exclusive. I’m looking for a way to make some easy to read card dials that read in standard mean time.I work at a number of historical reenactment fairs and I’d love a quick and portable way to show people how fun sundials can be and that sundials can be accurate. I have a number of universal ring dials but they read LAT. I’d like the dial to read in mean time because initially I’d like to be able to skip the explanation of Local Apparent Time vs. Mean Time and such. I realize that altitudinal card dials are not the most accurate, but since there is no such thing as a pocket Schmoyer dial I’m looking for an alternative that offers simplicity and a hook to catch people’s interest--and I'll be using them in the summer so the sun will have some altitude for the dial to discern. *I’m considering drafting latitude, longitude and date specific Capuchin dials corrected for daylight savings and the equation of time. I realize these dials would be one offs only of use at one location at one date, but since card dials can be drafted fairly easily this seems like a reasonable way to go. Granted, one can make a "universal" Capuchin dial that compensates for latitude and the time of the year, but such a dial still reads in LAT--Perhaps I could make two rotating hour wheels that line up with the hour scale to set for daylight savings, longitude offset from the center of the time zone and the equation of time (one for am and one for pm--I don't think there is a way to make a single wheel work)I’m wondering if people have any alternate suggestions and ways to make drafting more efficient on my Adobe CS2 equipped non-Intel Mac? (that is, I don't have Delta CAD at the moment.)Thanks,Gerard*Others may think that the path of the sun is fascinating as it is and doesn’t need to be equated with mean time, but I, personally, didn’t become fascinated by dialing until I discovered all the reasons why the dials I saw in parks didn’t read clock time and I assume that others may be dismissive of sundials for similar reasons. ---https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
Chris Lusby Taylor wrote on 10/17/06, 1:28 PM: "Actually, I thought "historical reenactment" and "standard mean time" are sort of mutually exclusive." Well, in the strict sense you are right, although there are historical re-enactments that take place in time periods after time was standardized. In my case I can make concessions to reality to get people interested. I'm not, in this instance, trying to be strictly historically accurate but to bridge a gap. Most people aren't, frankly, impressed that you can tell them Local Aparrent Mean time. They just look at their watch and note that you have the "wrong" time of day. I'm occasionally performing at "Renaisance" faires rahter than somethning like Plymoth Plantation. Renaissance fairs tend to be a little loose on the details these days so a certain amount of cheating is within the bounds of the type of event. "Of these, the most portable form is the Universal Equatorial (or Equinoctial) Ring Dial. To read mean time, itsequatorial ring must be made to rotate: most do not." Natrually, that would be ideal. I'd love to own one with an adjustable hour scale but to my knowledge, no such Ring Dial has been commercially available in recent history (or, perhaps, ever been mass produced) and making one would require a rather expensive commision or dedicating myself to learning how to etch and machine brass and taking on a fair bit of cost in practicing and tooling up to execute. If anyone knows of such a dial being available I'd be interested. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
Natrually, that would be ideal. I'd love to own one with an adjustable hour scale but to my knowledge, no such Ring Dial has been commercially available in recent history (or, perhaps, ever been mass produced) and making one would require a rather expensive commision or dedicating myself to learning how to etch and machine brass and taking on a fair bit of cost in practicing and tooling up to execute. If anyone knows of such a dial being available I'd be interested. The Icarus dial by Carlo Heller is a universal ring dial with adjusments for longitude, dst, and equation of time. - Original Message - From: Gerard Hughes To: Sundial List Sent: Tuesday, October 17, 2006 4:58 PM Subject: Re: Heliochronometer card dials? Chris Lusby Taylor wrote on 10/17/06, 1:28 PM: "Actually, I thought "historical reenactment" and "standard mean time" are sort of mutually exclusive."Well, in the strict sense you are right, although there are historical re-enactments that take place in time periods after time was standardized. In my case I can make concessions to reality to get people interested. I'm not, in this instance, trying to be strictly historically accurate but to bridge a gap. Most people aren't, frankly, impressed that you can tell them Local Aparrent Mean time. They just look at their watch and note that you have the "wrong" time of day. I'm occasionally performing at "Renaisance" faires rahter than somethning like Plymoth Plantation. Renaissance fairs tend to be a little loose on the details these days so a certain amount of cheating is within the bounds of the type of event. "Of these, the most portable form is the Universal Equatorial (or Equinoctial) Ring Dial. To read mean time, itsequatorial ring must be made to rotate: most do not."Natrually, that would be ideal. I'd love to own one with an adjustable hour scale but to my knowledge, no such Ring Dial has been commercially available in recent history (or, perhaps, ever been mass produced) and making one would require a rather expensive commision or dedicating myself to learning how to etch and machine brass and taking on a fair bit of cost in practicing and tooling up to execute. If anyone knows of such a dial being available I'd be interested. ---https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
On Tue, 17 Oct 2006, Fred Sawyer wrote: The Icarus dial by Carlo Heller is a universal ring dial with adjusments for longitude, dst, and equation of time. I'm not familiar with that design, and couldn't (quickly) find a reference to it, but what about something like this, cut from heavy cardstock? http://www.aboutstonehenge.info/index.php?pg=sundial-pocket http://www.online-relics.com/acatalog/Ringdials2.html Or is it yet another L.A.T. dial? Dave --- https://lists.uni-koeln.de/mailman/listinfo/sundial
RE: Heliochronometer card dials?
There is a type of Standard Time dial that goes by several names: SCADD, Spider, or Singleton sundials. It has built-in Equation of Time wavy hour lines and date lines. It can have a polar axis or vertical gnomon. You can make it horizontal, inclining or declining. And is simple to use. The only way I know to easily design one is by using a Delta Cad macro by Steve Lelievre. I will send you a sample drawing of one off line since the drawing size is too big for the List email filter. If you get Delta Cad, you can download Steves free macro at: http://users.eastlink.ca/~srgl/deltacad.htm John C. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gerard Hughes Sent: Tuesday, October 17, 2006 11:36 AM To: Sundial List Subject: Heliochronometer card dials? Ok, so I do realize that heliochronometer and card dial are sort of mutually exclusive. Im looking for a way to make some easy to read card dials that read in standard mean time. I work at a number of historical reenactment fairs and Id love a quick and portable way to show people how fun sundials can be and that sundials can be accurate. I have a number of universal ring dials but they read LAT. Id like the dial to read in mean time because initially Id like to be able to skip the explanation of Local Apparent Time vs. Mean Time and such. I realize that altitudinal card dials are not the most accurate, but since there is no such thing as a pocket Schmoyer dial Im looking for an alternative that offers simplicity and a hook to catch peoples interest--and I'll be using them in the summer so the sun will have some altitude for the dial to discern. * Im considering drafting latitude, longitude and date specific Capuchin dials corrected for daylight savings and the equation of time. I realize these dials would be one offs only of use at one location at one date, but since card dials can be drafted fairly easily this seems like a reasonable way to go. Granted, one can make a universal Capuchin dial that compensates for latitude and the time of the year, but such a dial still reads in LAT--Perhaps I could make two rotating hour wheels that line up with the hour scale to set for daylight savings, longitude offset from the center of the time zone and the equation of time (one for am and one for pm--I don't think there is a way to make a single wheel work) Im wondering if people have any alternate suggestions and ways to make drafting more efficient on my Adobe CS2 equipped non-Intel Mac? (that is, I don't have Delta CAD at the moment.) Thanks, Gerard *Others may think that the path of the sun is fascinating as it is and doesnt need to be equated with mean time, but I, personally, didnt become fascinated by dialing until I discovered all the reasons why the dials I saw in parks didnt read clock time and I assume that others may be dismissive of sundials for similar reasons. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
RE: Heliochronometer card dials?
Helmut Sonderegger's program "Sonne" calculates shepherd or cylindrical dials corrected for longitude and EoT. The program generates the location specificspecific drawings as in Fer's attachment. You can download "Sonne" from his website. http://web.utanet.at/sondereh/sun.htm Roger Bailey Walking Shadow Designs N 48.66 W 123.4 -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of fer de vriesSent: October 17, 2006 12:28 PMTo: Gerard Hughes; Sundial ListSubject: Re: Heliochronometer card dials? Gerard, You could make a sheperd's dial. These are location specific. Attached is a picture of the scale for such a dial with correction for longitude and equation of time. It would be better if you make two, one for the morning hours and one for the afternoon hours. Red cq blue lines in the picture. Also a Capuchin dial for one latitude can be corrected for longitude and EoT but also split the pattern in two parts. Correction for daylight saving time is no more then adding new numbers to the dial. Such altitude dial will not work accurate around noon but the possibility to make them for clock time is present. Best wishes, Fer. Fer J. de Vries De Zonnewijzerkringmailto:[EMAIL PROTECTED]http://www.de-zonnewijzerkring.nl Eindhoven, Netherlandslat. 51:30 N long. 5:30 E - Original Message - From: Gerard Hughes To: Sundial List Sent: Tuesday, October 17, 2006 8:36 PM Subject: Heliochronometer card dials? Ok, so I do realize that "heliochronometer" and "card dial" are sort of mutually exclusive. I’m looking for a way to make some easy to read card dials that read in standard mean time.I work at a number of historical reenactment fairs and I’d love a quick and portable way to show people how fun sundials can be and that sundials can be accurate. I have a number of universal ring dials but they read LAT. I’d like the dial to read in mean time because initially I’d like to be able to skip the explanation of Local Apparent Time vs. Mean Time and such. I realize that altitudinal card dials are not the most accurate, but since there is no such thing as a pocket Schmoyer dial I’m looking for an alternative that offers simplicity and a hook to catch people’s interest--and I'll be using them in the summer so the sun will have some altitude for the dial to discern. *I’m considering drafting latitude, longitude and date specific Capuchin dials corrected for daylight savings and the equation of time. I realize these dials would be one offs only of use at one location at one date, but since card dials can be drafted fairly easily this seems like a reasonable way to go. Granted, one can make a "universal" Capuchin dial that compensates for latitude and the time of the year, but such a dial still reads in LAT--Perhaps I could make two rotating hour wheels that line up with the hour scale to set for daylight savings, longitude offset from the center of the time zone and the equation of time (one for am and one for pm--I don't think there is a way to make a single wheel work)I’m wondering if people have any alternate suggestions and ways to make drafting more efficient on my Adobe CS2 equipped non-Intel Mac? (that is, I don't have Delta CAD at the moment.)Thanks,Gerard*Others may think that the path of the sun is fascinating as it is and doesn’t need to be equated with mean time, but I, personally, didn’t become fascinated by dialing until I discovered all the reasons why the dials I saw in parks didn’t read clock time and I assume that others may be dismissive of sundials for similar reasons. ---https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
The Icarus dial can be seen at: http://www.heliosuhren.de/E_main_19_00.html - Original Message - From: Dave Bell [EMAIL PROTECTED] To: Sundial List sundial@uni-koeln.de Sent: Tuesday, October 17, 2006 5:35 PM Subject: Re: Heliochronometer card dials? On Tue, 17 Oct 2006, Fred Sawyer wrote: The Icarus dial by Carlo Heller is a universal ring dial with adjusments for longitude, dst, and equation of time. I'm not familiar with that design, and couldn't (quickly) find a reference to it, but what about something like this, cut from heavy cardstock? http://www.aboutstonehenge.info/index.php?pg=sundial-pocket http://www.online-relics.com/acatalog/Ringdials2.html Or is it yet another L.A.T. dial? Dave --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
Hi Gerard, I'd like the dial to read in mean time because initially I'd like to be able to skip the explanation of Local Apparent Time vs. Mean Time and such. It's not qite chronometer accuracy, but feel free to use modify the time scale in this card ring dial. It was done in MS Word. http://leewm.freeshell.org/origami/ringdial.doc Rgds weemeng --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
Hello Fred, What a wonderful dial! I watched the video on his website, and the machining sequences are awesome. This dial looks like the ideal Christmas present for any dial enthusiast who travels. But I wonder what the airport security people would say about it? Cheers, John John Pickard [EMAIL PROTECTED] - Original Message - From: Fred Sawyer [EMAIL PROTECTED] To: Dave Bell [EMAIL PROTECTED]; Sundial List sundial@uni-koeln.de Sent: Wednesday, October 18, 2006 10:35 AM Subject: Re: Heliochronometer card dials? The Icarus dial can be seen at: http://www.heliosuhren.de/E_main_19_00.html --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Heliochronometer card dials?
Hi Gerard, I've had the most fun with modified cardstock vertical dials made with longitude and EOT compensation. They are modified by making sights to point at some distant point, like a particular mountan peak. The sights align the dial for north/south and up/down. It needs a second person to read the time though. they are a fixed latitude/longitude for the site and the curved time lines are good for an entire season. It is usually possible to find some distant point to sight on out here in the Pacific Northwest, usually from a countour map. I've not tried using Google Earth to find a sight point yet, but maybe that would work out. The various sight arms and gnomon fold out from the card stock, Both sides are printed. ( I usually glue one side on to add stiffness and make alignment of the two sides easier) One of the cone dials that gives time to sunset would be a great addition to festivals out in flatlander country, but I never go there. :-) Floating altitude dials seem to be fairly popular. Have fun! Edley McKnight Date sent: Tue, 17 Oct 2006 11:36:02 -0700 (PDT) From: Gerard Hughes [EMAIL PROTECTED] To: Sundial List sundial@rrz.uni-koeln.de Copies to: Subject:Heliochronometer card dials? Ok, so I do realize that heliochronometer and card dial are sort of mutually exclusive. I´m looking for a way to make some easy to read card dials that read in standard mean time. I work at a number of historical reenactment fairs and I´d love a quick and portable way to show people how fun sundials can be and that sundials can be accurate. I have a number of universal ring dials but they read LAT. I´d like the dial to read in mean time because initially I´d like to be able to skip the explanation of Local Apparent Time vs. Mean Time and such. I realize that altitudinal card dials are not the most accurate, but since there is no such thing as a pocket Schmoyer dial I´m looking for an alternative that offers simplicity and a hook to catch people´s interest--and I'll be using them in the summer so the sun will have some altitude for the dial to discern. * I´m considering drafting latitude, longitude and date specific Capuchin dials corrected for daylight savings and the equation of time. I realize these dials would be one offs only of use at one location at one date, but since card dials can be drafted fairly easily this seems like a reasonable way to go. Granted, one can make a universal Capuchin dial that compensates for latitude and the time of the year, but such a dial still reads in LAT--Perhaps I could make two rotating hour wheels that line up with the hour scale to set for daylight savings, longitude offset from the center of the time zone and the equation of time (one for am and one for pm--I don't think there is a way to make a single wheel work) I´m wondering if people have any alternate suggestions and ways to make drafting more efficient on my Adobe CS2 equipped non-Intel Mac? (that is, I don't have Delta CAD at the moment.) Thanks, Gerard *Others may think that the path of the sun is fascinating as it is and doesn´t need to be equated with mean time, but I, personally, didn´t become fascinated by dialing until I discovered all the reasons why the dials I saw in parks didn´t read clock time and I assume that others may be dismissive of sundials for similar reasons. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
