RE: On bifilar polar sundial

2002-09-13 Thread Jose Luis Diaz
- From: Willy Leenders [EMAIL PROTECTED] To: sundial@rrz.uni-koeln.de Sent: Thursday, September 12, 2002 12:23 PM Subject: Re: On bifilar polar sundial Dear Frans, Jose, Anselmo and all, There is an other analytical equation for the curved gnomon of the Appingedam-sundial:: x = (1 - z) * ((1 - z

Re: On bifilar polar sundial

2002-09-12 Thread Willy Leenders
Message - From: Jose Luis Diaz [EMAIL PROTECTED] To: sundial@rrz.uni-koeln.de Sent: Tuesday, September 10, 2002 2:10 PM Subject: RE: On bifilar polar sundial I think the result is x^2 = (1 - 2z + 2z^3 - z^4) / z^2. Kind regards, - Original Message - From

RE: On bifilar polar sundial

2002-09-12 Thread Roger Bailey
the acceleration due to gravity and H the tension in the cable and C a constant. Roger Bailey -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Willy Leenders Sent: September 12, 2002 4:24 AM To: sundial@rrz.uni-koeln.de Subject: Re: On bifilar polar sundial Dear

Re: On bifilar polar sundial

2002-09-12 Thread Willy Leenders
: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Willy Leenders Sent: September 12, 2002 4:24 AM To: sundial@rrz.uni-koeln.de Subject: Re: On bifilar polar sundial Dear Frans, Jose, Anselmo and all, There is an other analytical equation for the curved gnomon of the Appingedam-sundial

Re: On bifilar polar sundial

2002-09-12 Thread fer j. de vries
, 2002 12:23 PM Subject: Re: On bifilar polar sundial Dear Frans, Jose, Anselmo and all, There is an other analytical equation for the curved gnomon of the Appingedam-sundial:: x = (1 - z) * ((1 - z^2)^0.5) / z Willy Leenders Hasselt, Flanders in Belgium Frans W. Maes wrote: You

Re: On bifilar polar sundial

2002-09-12 Thread Willy Leenders
a constant. Roger Bailey -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Willy Leenders Sent: September 12, 2002 4:24 AM To: sundial@rrz.uni-koeln.de Subject: Re: On bifilar polar sundial Dear Frans, Jose, Anselmo and all, There is an other

Re: On bifilar polar sundial

2002-09-10 Thread Frans W. Maes
Subject: On bifilar polar sundial Hoi, Frans! I have been playing a bit with the equations for a bifilar dial trying to reproduce the bifilar polar dial that I saw in your web. There you say that the transversal gnomon is a piece of hyperbola, but I have found that it is really a piece

RE: On bifilar polar sundial

2002-09-10 Thread Jose Luis Diaz
I think the result is x^2 = (1 - 2z + 2z^3 - z^4) / z^2. Kind regards, - Original Message - From: Frans W. Maes [EMAIL PROTECTED] To: sundial@rrz.uni-koeln.de Sent: Tuesday, September 10, 2002 9:13 AM Subject: Re: On bifilar polar sundial Dear Anselmo and all

Re: On bifilar polar sundial

2002-09-10 Thread Frans W. Maes
You are right, Jose. Thanks for checking! Frans - Original Message - From: Jose Luis Diaz [EMAIL PROTECTED] To: sundial@rrz.uni-koeln.de Sent: Tuesday, September 10, 2002 2:10 PM Subject: RE: On bifilar polar sundial I think the result is x^2 = (1 - 2z + 2z^3 - z^4) / z^2

Re: On bifilar polar sundial

2002-09-09 Thread fer j. de vries
: On bifilar polar sundial Hoi, Frans! I have been playing a bit with the equations for a bifilar dial trying to reproduce the bifilar polar dial that I saw in your web. There you say that the transversal gnomon is a piece of hyperbola, but I have found that it is really a piece of ellipse

On bifilar polar sundial

2002-09-08 Thread Anselmo Pérez Serrada
I have been playing a bit with the equations for a bifilar dial trying to reproduce the bifilar polar dial that I saw in your web. There you say that the transversal gnomon is a piece of hyperbola, but I have found that it is really a piece of ellipse (there are more solutions, but none is an