Dear Helmut I have made such a dial for a friend in 5mm bronze, (so its gnomon is 5mm wide). It was cut with a water-jet (cost £250) and photo etched (cost £210). It contains sunrise and sunset lines. Somewhat similar to yours as far as density of hour lines etc, but somewhat smaller.
The design was accomplished entirely from Python code (more than 2000 lines of code - a lot of which are the very precise astronomical algorithms). I made a number of laser-engraved/cut maquettes from 5mm plywood (about £10 each) to get the final design approved by my friend's children who paid the bill. The software produced 3 different images - one for there laser-cutter, one for the water-jet cutter and one for the photo-etchers. Now I can produce a design similar to this one at any other Lat/Long in a very short time. I'll send you other pictures by separate e-mail The only other dial of this type I know in in the Parkes Observatory in New South Wales, Australia. You can find one image of it with a Goggle search "Parkes Observatory sundial" Best regards Kevin Karney Freedom Cottage, Llandogo, Monmouth NP25 4TP, Wales, UK 51° 44' N 2° 41' W Zone 0 + 44 1594 530 595 > On 23 May 2016, at 18:54, Helmut Haase <[email protected]> wrote: > > Hi, > I have designed and realized a horizontal spider sundial with polar pointing > wide gnomon, see details below and photo (in a second approach sadly reduced > to 47 kB now). Does anyone know such a sundial anywhere else? I found many > spider sundials but none with a wide polar gnomon. A photo link or any other > information would be great?
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