Hi John , if in an azimuthal sundial we take the circles as you propose we get for every month a point. If we connect these points we get some hour lines (Standard or Mean Time ) that have the shape that you can see in the two figures attached. In the pictures the lines are made by segments and are not smoothed but a better result is gotten taking a point (a circle) every 15 days.
In the pictures the radii are 20 cm for June, 30 for July, 40 for May, 50 for August, 60 for April, 70 for Sept, 80 for March, 90 for Oct, 100 for Feb, 110 for Nov, 120 for Jan and 130 for December. The pole is high 150 cm In the second image I have tilted the pole toward North to form an angle of 60 degrees with the horizontal plane. The figures have been gotten with my program SUND98P distributed with the issue of September 1998 of The Compendium. The curves are very condensed in summer : I would have to make some other test to get good results aesthetically Best Gianni Ferrari --------------------------------------------------------------------------- Ing.Gianni Ferrari Via Valdrighi, 135 41100 - MODENA (ITALY) EMail : [EMAIL PROTECTED] http://members.tripod.com/meridiane/index.htm --------------------------------------------------------------------------- Attachment converted: Macintosh HD:Azimuth1.gif (GIFf/JVWR) (0000F00F) Attachment converted: Macintosh HD:Azimuth2.gif (GIFf/JVWR) (0000F010)
