Azimuthal dial

[fer j. de vries]

Hello Dave, Attached ia an example of such a dial. Spin means spider. The dial is for latitude 52 degrees north, longitude 5 degrees east, time meridian 15 degrees east ( our wintertime ) ( In summer we use 30 degrees east as time meridian ) You don't need a nodus, but just a vertical rod in the center. Read where the shadow of the rod intersects the circle of the proper date. At low latitude this type of dial isn't very useful. Best, Fer. Fer J. de Vries [EMAIL PROTECTED] http://www.iae.nl/users/ferdv/ Eindhoven, Netherlands lat.  51:30 N      long.  5:30 E ----- Original Message ----- From: Dave Bell <[EMAIL PROTECTED]> To: fer j. de vries <[EMAIL PROTECTED]> Sent: Wednesday, January 19, 2000 9:46 PM Subject: Re: Dali dials > Hello, Fer! > > > In my programs suite zwvlak95 there is a program spin.exe to calculate such > > a dial for a horizontal plane with circular scales of date and a vertical > > style. > > You also may name this type of dial an azimuthal dial. > > Can you give me a mental (or real!) image of this dial? I had never tried > 'spin' before, and the result is, to say the least, interesting! Is this > basically a flat dial, with a vertical style and nodus? How would one > derive the height from the drawing? > > Thanks! > > Dave > > Fer J. de Vries [EMAIL PROTECTED] http://www.iae.nl/users/ferdv/ Eindhoven, Netherlands lat.  51:30 N      long.  5:30 E Attachment converted: Macintosh HD:spin.gif (TIFF/JVWR) (0000C5C6)