TheSwamp

Code Red => VB(A) => Topic started by: David Hall on March 31, 2009, 01:16:06 PM

Title: Catenary curve
Post by: David Hall on March 31, 2009, 01:16:06 PM

Can out of the box acad using VBA draw a catenary curve?  I am trying to see if its worth programming for cable sag in a transmission line.  Any ideas welcome

Title: Re: Catenary curve
Post by: Bob Wahr on March 31, 2009, 01:33:31 PM

http://www.digitalcad.com/2001/05_may/features/math1.htm

Title: Re: Catenary curve
Post by: David Hall on March 31, 2009, 02:17:53 PM

Thanks Bob for finding those so quickly, but my question is more towards the engineering side of the design (which I am not) of the cable properties.  Where would we input the cable weight, circular area, stretchability, etc. into that equation?

Title: Re: Catenary curve
Post by: Bob Wahr on March 31, 2009, 02:37:08 PM

Down towards the bottom is a lisp routine that lets you input weight and tension.  Unless they are lying or I are missing something.

Title: Re: Catenary curve
Post by: David Hall on March 31, 2009, 03:59:29 PM

I guess I missed that.  I'll look again