Hi Yan: Perhaps the easiest way to get a drawing of your sundial would be to download one of the sundial generator programs available online.
One of the most popular ones is Shadows Pro. You can download it at www.shadowspro.com (there is a free version available that has less functions). Also popular is ZW2000 available at http://www.de-zonnewijzerkring.nl/eng/index-vlakke-zonw.htm (this is a free and in English) Less known, but also good are: Sonne at http://web.utanet.at/sondereh/ (free and in English) Oralogi Solari at http://digilander.libero.it/orologi.solari/download/download_enu.html (free and in English) Good luck with your project John -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Yan Seiner Sent: Saturday, July 26, 2008 6:46 AM To: sundial@uni-koeln.de Subject: Vertical declining sundial help I've been interested in sundials for a long time but I've never built one. As an engineer by trade, I have some understanding of the math, but never actually having used the equations for a real project my understanding hasn't been tested. :-) We recently bought a house that has a perfect location for a vertical declining sundial. The wall faces almost directly south - it is 17 deg. off with a bearing of N73W - and faces a school. So I'd like to set up the sundial with the summer vacation marked. I can't find any information on how to calculate the position for a specific date on a vertical declining sundial. I'm at 44°03′07″N 123°05′12″W <http://stable.toolserver.org/geohack/geohack.php?pagename=Eugene%2C_Oregon¶ms=44_03_07_N_123_05_12_W_type:city>. I would appreciate any help getting started. Thanks, --Yan -- o__ ,>/'_ o__ (_)\(_) ,>/'_ o__ Yan Seiner (_)\(_) ,>/'_ o__ Personal Trainer (_)\(_) ,>/'_ o__ Professional Engineer (_)\(_) ,>/'_ Who says engineers have to be pencil necked geeks? (_)\(_) "I worry about my child and the Internet all the time, even though she's too young to have logged on yet. Here's what I worry about. I worry that 10 or 15 years from now, she will come to me and say 'Daddy, where were you when they took freedom of the press away from the Internet?'" --Mike Godwin, Electronic Frontier Foundation --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
