created by Carl Sabanski
Virtual Sundials: Phil Walker
The following 3D sundials were created by Phil Walker. He used Google SketchUp to create these virtual sundials. The great thing about SketchUp is that you can get a free version. Visit Phil's "Virtual Sundials" page where you can find more details about using SketchUp. You will also see more of Phil's virtual sundials along with the descriptions associated with them. He even has videos of the sundials showing the movement of the shadows.
This is a virtual sundial of a vertical declining sundial. The sundial is declining to the west. It also displays the solstice and equinox lines. Note the noon gap that compensates for the wide gnomon.
This is a virtual sundial of a cycloid polar sundial. The design is based on information available at The Sundial Primer. But this sundial is different. It is designed to indicate standard time. The graph on the dial plate combines the corrections for the Equation of Time and longitude for the sundial's location. By sliding the gnomon until the vertical line is aligned with the correction for a given day the sundial will indicate clock time.