Anniversary-of-a-date dial
Message text written by INTERNET:sundial@rrz.uni-koeln.de This request is not limited to tubes. Any clever idea is welcome. How about the Liberation Monument WW2 Memorial, St Peter Port in Guernsey? That is calibrated so that on the anniversary of the Island's liberation (May 9th I think) the show of a column passes over the plaques each containing the name of one who died. Patrick -
Re: Anniversary-of-a-date dial
unless they are on the date of a solstice. Tubes in a dial or in a structure would light up for a certain time when the sun's declination has a certain value. In order for this to be only on one day the tube would have to be quite narrow if close to a solstice (declination not changing rapidly). For examples of illuminating objects INSIDE a building, see J.L. Heilbron's book The Sun in the Church. He shows two examples in the color plates: Plate 3,The Tower of the Winds at the Vatican and Plate 8, The Shrine of Remembrance, Melbourne. I could not find much discussion of the first example. However, he has some discussion of the Melbourne application on page 288. By the way, an excellent guide to this book is found on www.math.nus.edu.sg/aslaksen/teaching/heilbron.html Claude Hartman Arroyo Grande, CA 35.13N 120.58W Tom Egan wrote: I'm looking for examples of dials that will illuminate a particular spot on the dial only on the date (and time of day, preferably) to be commemorated. I recall running across links to tube-based dials in the past, but apparently didn't file them away. Can anyone point me to such dials? I want to show examples to a group of which I am a member. If they are intrigued by it, the members might want to commission a dial. This request is not limited to tubes. Any clever idea is welcome. You may respond to me off-line if you wish at [EMAIL PROTECTED] Thanks. Tom Egan Costa Mesa California - -
Re: Anniversary-of-a-date dial
Perhaps the classic "anniversary" dial is the vertical decliner by Christopher Daniel at Chatham, Kent. It is known as the Nelson dial and it has a small circular spot in the dialface in the form of the Union Flag. This commemorates not just the date, but also the time when Admiral Nelson was mortally wounded on his flagship HMS Victory during the Battle of Trafalgar. Regards, John ---Dr J R DavisFlowton DialsN52d 08m: E1d 05m)
Re: Anniversary-of-a-date dial
I'm looking for examples of dials that will illuminate a particular spot on the dial only on the date (and time of day, preferably) to be commemorated... At the 2003 NASS Conference in Banff, Helm Roberts described his work as architect of the Kentucky Vietnam Veteran's Memorial. Helm designed this large horizontal dial so that the shadow of the tip of the gnomon touches the engraved name of each fallen veteran on the anniversary of his death. -- Best wishes, Larry McDavid W6FUB Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland) -
Anniversary-of-a-date dial
on the dial only on the date (and time of day, preferably) to be commemorated. I recall running across links to tube-based dials in the past, but apparently didn't file them away. Can anyone point me to such dials? I want to show examples to a group of which I am a member. If they are intrigued by it, the members might want to commission a dial. This request is not limited to tubes. Any clever idea is welcome. You may respond to me off-line if you wish at [EMAIL PROTECTED] Thanks. Tom Egan Costa Mesa California -
Re: Anniversary-of-a-date dial
On the sundial website of Frans Maes http://www.biol.rug.nl/maes/zonnewijzers/welcome-e.htm you can see the equatorial sundial of Sint-Martens-Voeren in Flanders, Belgium. The shadow of a little ball in the slit-shaped pole-style hits the center line of the time scale on July 11, the holiday of the Flemish Community. On the sundial website of Frans Maes http://www.biol.rug.nl/maes/genk/welcome-e.htm you can see the Euro meridian in the subial park of Genk (Flanders, Belgium) Two granite blocks, 3 meter (10 ft) high and 5 ton in weight, enclose a slit of 3 cm wide (1.2). It can pass a thin line of sunlight. When the sun is due south, at local noon, the light hits the center line of the tile plateau. A small rod connects the two blocks, just below the top. It causes a break in the line of light. This break serves as a marker which indicates the date along the meridian line. The dates of the national holidays of the member states of the European Union are marked by crosslines and identified by the national flags. Willy Leenders Hasselt, Flanders, belgium 50.9 N 5.4 E Tom Egan wrote: I'm looking for examples of dials that will illuminate a particular spot on the dial only on the date (and time of day, preferably) to be commemorated. I recall running across links to tube-based dials in the past, but apparently didn't file them away. Can anyone point me to such dials? I want to show examples to a group of which I am a member. If they are intrigued by it, the members might want to commission a dial. This request is not limited to tubes. Any clever idea is welcome. You may respond to me off-line if you wish at [EMAIL PROTECTED] Thanks. Tom Egan Costa Mesa California - -
