Hello All (esp. sundial makers):
I needsome helpon something.
(what else is new)...
I'm designing a huge horizontal dial for Cordera
Elementary School in Colorado Springs. The face is 120' wide and the
perpendicular gnomon will be 12' (3.65M) tall. I'd like to talk the
builder into using
Hi John C,That's a BIG gnomon! It will be enormously heavy if it is solid so I would opt for a fabricated design. Although you can make a cone by rolling up a circle with a slice cut out, that would need a sheet of material large enough to draw at least part of a 24' diameter circle - not easy
Steel frame welded and bolted in 3 sections
(two sides and top) with copper or brass sheeting bolted on. Maybe a
concrete base 3/4 ft high with rebar studs to bolt the thing down to. pre
assemble -mark - disassemble,then ship to site with easy to follow
instructions.
Just my .02
Dave G.
See http://www.fransmaes.nl/genk/index.html (only in Dutch language) Go to 9. Kegel (uniek!).This cone gnomon belongs to a sundial indicating babylonian and italic hours.Willy LEENDERSHasselt Flanders (Belgium)Op 22-sep-06, om 17:43 heeft John Carmichael het volgende geschreven: Hello All (esp.
Dear John,
I believe on our UK members, John Moir, (not on the list) has designed a tall slender conical inclined gnomon.
I have left a message on his answering machine, and I will report if he calls back.
Regards, Doug
On Sep 22, 2006, at 16:43, John Carmichael wrote:
Hello All (esp. sundial
Hi John
I'm designing a huge horizontal dial for Cordera Elementary School in
Colorado Springs. The face is 120' wide and the perpendicular gnomon will
be 12' (3.65M) tall. I'd like to talk the builder into using a giant
cone gnomon, but I have no idea how in the world you would construct
Dear John,
An update on my earlier message. The dial is shown on p135 of the book Sundials of the British Isles.
John has telephoned to say that it is made of steel, and I will get more details when I see him at one of our meetings tomorrow.
Regards, Doug
On Sep 22, 2006, at 16:43, John
john,
I suggest a tried-and-tested, lowtech but labourious method:
since a cone is a developable surface it can be of flat material. you
should be able to get a piece of remesh large enough, or make one by
overlapping two sheets and wiring them together.
cut out the cone and roll it up.
