Equatorial Sundial model

Thu, 10 Dec 2009

The equatorial sundial is one of the tradition sundial designs. The gnomon, the piece that casts a shadow is lined up with the axis of spin of the earth. To do this the whole assembly needs to be able to tilt back and forth depending on where on earth the sundial is used.

In the picture on the right you may be able to make out the angle is set to just over 50 degrees, this is the latitute where we are.

Once the angle is set up right it is simply a matter of lining up the sundial on the North/South line and waiting for the sun to come out. Works a treat! This prototype had the time spot on when the sun peeped through the clouds this afternoon.

Layout and colour next. A subscriber exclusive I think.

Comments (2)

  • randolph kim December 11, 2009 at 4:44 am

    Wow almost daily you are

    Wow almost daily you are coming up with something!  It makes so happy to be the subscriber since you are considering something like this to be subscriber exclusive!   Thank you!

    • robives December 11, 2009 at 6:36 pm

      You’re welcome. The sundial

      You’re welcome. The sundial should be ready early next week.

      Rob

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