p.s.
A word of warning about using any of these sundial design programs-
These sundial programs ask you to input the characteristics of the sundial you
want.
But they all use different nomenclature and definitions for longitude and wall
declination inputs. Some of them use negative values (-) for West longitudes,
and other use positive values (+) for West longitudes. So be careful when you
enter longitude and wall declination values that you use the correct sign.
When I use design a sundial I always use at least two sundial programs so that
I can catch any input errors. I compare both drawings to make sure they are
identical. Often I catch major errors because I got confused and did not enter
the correct longitude value sign or the wall declination value sign.
To avoid these serious errors, read the "Help" or "Definition" tabs to find out
the correct value definition for each program.
It's unfortunate that the dialing community does not have uniform definitions
for longitude and wall declination. It makes it confusing for beginners and
even experienced dialists. It definitely makes communication among dialists
more confusing and error prone. And it makes these programs dangerous in the
hands of beginners. I bet a lot of people have entered the wrong values in
these programs and have made sundials that don't work and they wonder why.
John
(educational) Sundial Cupolas, Towers & Turrets:
http://StainedGlassSundials.com/CupolaSundial/index.html
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Saturday, July 26, 2008 9:29 AM
To: [EMAIL PROTECTED]; [email protected]
Subject: R: Vertical declining sundial help
Why don't you try with my "Orologi Solari" program ?
It can manage several types of dials including vertical declining ones, and
it can design a day line for a specific day.
It includes a large help file.
User interface and help file are in English as well as in Italian and Czech.
It can be freely downloade from my web pages : http://digilander.libero.
it/orologi.solari
Try and let me know !
Gian Casalegno
>----Messaggio originale----
>Da: [EMAIL PROTECTED]
>Data: 26/07/2008 15.46
>A: <[email protected]>
>Ogg: 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
>
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