Sunny Day, If you are looking for an interactive sundial that is a little bit different, then you might want to build a shadow plane sundial. I believe that there are not many of these larger sundials in existence, however, I have found a couple of them on the internet.
There are a total of 81 "Dialling Guides" that cover the range of latitudes from 25° to 65° inclusive in increments of 0.5°. The "Dialling Guides" are in the form of tables and are for a horizontal shadow plane sundial. The "Dialling Guides" are designed so the sundial will show local apparent or solar time. Each "Dialling Guide" contains 2 sets of tables. As the sundials are intended for people there is information available to construct sundials with east-west widths of 1 and 3 metres. The smaller sundial can be made into a model to test the dial out. The larger sundial can be used to construct a shadow plane sundial of any size and shape. There is also a set of instructions describing a method for constructing the sundial. If you are interested please visit: http://www.mysundial.ca/sdu/sdu_dialling_guides_horizontal_shadow_plane_sund ial.html Happy Dialling! Carl Sabanski www.mysundial.ca --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
