[TheForge] eliptical rings on a cone mandrel?

[Marc]

It should be. I remember the same thing from high school, and now this:
http://math2.org/math/algebra/conics.htm

--Marc


On Fri, 2006-11-17 at 16:23 -0500, wmullett at bright.net wrote:
> The ellipse formed by a cone is not symmetrical.
> 
> > 
> > From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
> > Date: Fri Nov 17, 9:45 AM
> > To: <theforge at mailman.qth.net>
> > Subject: [TheForge] eliptical rings on a cone mandrel?
> > 
> > Those of you who suffered through algebra are aware of the "conic
> > sections" - shapes that can be derived mathematically from a cone.  The
> > circle, for example is a horizontal slice through a cone.  Blacksmiths
> > make use of this by using a cone mandrel to make perfectly circular
> > rings.