I have been asked about a link to the Compendium article I quoted im my previous email.
Well that article is not actually available but almost the same content is included in the following presentation : http://www.sundials.eu/download/bifilareENU.pdf Moreover an example of the results you can obtain with the program can be seen in this simulation made with SketchUp : https://youtu.be/tD22oba6RyQ Ciao. Gian Il giorno ven 27 set 2019 alle ore 22:40 Gian Casalegno < [email protected]> ha scritto: > David, > have a look at the bifilar sundials article on The Compendium 24-2 : > "Bifilar sundials within everyone's means" (let me know if you cannot reach > it). > Then download the "Orologi Solari" program that can be used to design > almost every kind of bifilar sundials. > And let me know about every doubt you may have. > Kind regards. > Gian Casalegno > > Il giorno ven 27 set 2019 alle ore 17:33 David Andersson < > [email protected]> ha scritto: > >> In message < >> caokdy5chx5cvb8u1wt6vfbkmydurwp7z4pkz_jg6o5li4pa...@mail.gmail.com> >> Michael Ossipoff <[email protected]> wrote: >> >> > I like the pond suggestion, It hadn't occurred to me, and I hadn't >> heard it >> > before. >> > >> > Michael Ossipoff >> > 40 F >> > September 27th >> > 1101 UTC >> >> >> Just like yourself, I never thought of using a surrounding water- >> barrier to protect any sundial from vandalism - but I tend to >> agree with the people who see that an interactive Analemmatic is >> probably best, and is almost intuitive how it works (so no great >> explanation, apart from "stand on today's date" is necessary). >> >> >> However, I would like to have some further information on the >> "bi-filar" sundial mentioned by Linda Reid - as I am intrigued >> that the time is indicated by the INTERSECTION of shadows cast >> by two horizontal gnomons. I have never seen this type of dial, >> so I would be grateful if anybody can send a diagram (or even a >> photograph) of one to this Mailing List - plus if it is 'equi- >> angular', I can see that it will be much easier to manufacture. >> >> I assume the two horizontal gnomons have to be 'adjustable' in >> some way, if the dial has to deal with Latitude variations - and >> with Longitude/EoT being dealt with, by rotating its Hour-ring? >> >> >> Regards, >> >> David Andersson. >> >> >> -- >> --------------------------------------------------- >> https://lists.uni-koeln.de/mailman/listinfo/sundial >> >>
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