I've seen some info on bifilar sundials, and they look very interesting. I thought I would try to make a simple one (if that is possible). An east and/or west facing vertical dial would be the most useful at my location. Actually the surfaces I would be using decline a little south of west and north of east (and also recline slightly). I would be sketching in the time marks (Hawaii Standard) empirically since I am also some 8 degrees west of the standard meridian.
Is this doable? Are the computations for the threads and the point of origin for the hour lines fairly simple? If yes I'll dig in and do the necessary research, just don't want to be off on an impossible quest. Thank you in advance for your help! Nathaniel Shippen
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