Dear all, Needles to say, this mailing-list is wonderful!
Thanks for all your contributions on the greatest feasible size of an analemmatic. I have been making tests with the spreadsheet written by Roger and Helmut and simulations with POV-RAY, and so far I do believe that 6 meter (18 ft) wide could be a good upper bound, as Frans Maes suggested in his web (hartelijk bedankt voor uw web, Frans!). With that size the shadow of a common person does not reach the ellipse in the four central hours of summer days, which seems quite reasonable. Now my doubts lie in materials: I have been talking to people hwo knows about road construction and things like these and every one of them tells me a different thing about laying the numbers and the decorations. Any suggestion from you? Best regards, Anselmo -
