[TheForge] eliptical rings on a cone mandrel?

[Rick]

I stand corrected.  Sorry, all.

Rick


----- Original Message ----- 
From: "Marc" <marc at ironringforge.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Friday, November 17, 2006 9:55 PM
Subject: Re: [TheForge] eliptical rings on a cone mandrel?


> 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.