I also use steam engine methods for seeing how trees and building affect my
dials. I made a simple set of altitude triangles placed on azimuth lines, and
hold it to my eye, it being aligned true south. And My eye sees if the trees
affect the dial. This is the same method I used when I installed some 3kw of
solar PV panels which have been powering my house for almost 10 years.
Simon Wheaton-Smith
www.illustratingshadows.com
--- On Thu, 2/11/10, Bill Gottesman wrote:
> From: Bill Gottesman
> Subject: Re: 3d sundial-model?
> To: "Thomas Steiner"
> Cc: sundial@uni-koeln.de
> Date: Thursday, February 11, 2010, 8:31 AM
> To model experimental sundials around
> 2000 I bought an 8" machinist's
> rotary table (controllable to better than 1 minute of a
> degree). I set
> up 3 light sources to mimic the solstices and the equinox,
> and build
> scale models of my dials and observed the shadows as I
> turned the models
> on the rotary table. This is a mechanical old-school
> approach. Later I
> found many uses for the rotary table when machining parts
> on my (small)
> milling machine. If you attend this year's NASS
> conference August
> 12-15, I will show my modest basement workshop on the
> tour.
>
> -Bill Gottesman
>
> Thomas Steiner wrote:
> > Hi all,
> > do you model your sundials before creating them in 3d-
> software like
> > sketchup, blender or so?
> >
> > It helps if you want to know if anything around casts
> some shadow onto
> > your sundial.
> > I tried sketchup, but I am not yet an expert:
> > http://picasaweb.google.com/finbref/SonnenuhrBurgauberg#5430320896494713954
> >
> > It would be great if you could tell us/me here about
> your experiences
> > (especially I'd be curious for blender)
> > Thanks,
> > Thomas
> > ---
> > https://lists.uni-koeln.de/mailman/listinfo/sundial
> >
> >
> >
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
---
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