[TheForge] eliptical rings on a cone mandrel?

[David E. Smucker]

Bruce,

No lathe was used.  It has been a lot of years but my memory is that Dad 
(and he did 90 percent of the work except final sanding and a finish which I 
did) first cut a 4 sided shape on the table saw using a taper set up.   It 
was a long piece of white pine that had a rectangular shaped base and taper 
to a point at the top.  He then held the base in the vise and shaped the 
tapered section using a block plane.  Working completely by eye.  I then 
finished sanding it.  Last step was to cut it off at an angle so that we got 
a circular base.  I got an A+ on the project.  (Teacher knew Dad did most of 
the work, he just loved that someone was interested in such a thing.)  Dad 
was a father, craftsman, and engineer in that order.  And he was a damn good 
engineer.

Dave Smucker
----- Original Message ----- 
From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
To: <theforge at mailman.qth.net>
Sent: Monday, November 20, 2006 9:52 AM
Subject: Re: [TheForge] eliptical rings on a cone mandrel?


> Your father machined this on his elliptical lathe, right?
>
>>>> davesmucker at hotmail.com 11/18/2006 5:02 PM >>>
> While on this subject here is an interesting variation.  You can make a
> cone
> which appears elliptical in cross section when looking down on the cone
> from
> above -- but cut at the correct angle its cross section will be a
> circle.
> With the help of my father who was a very good woodworker we shaped
> such a
> cone when I was in high school -- and presented it to my math teacher.
> He
> loved it and always showed it to his advanced math classes.  Place on
> this
> circular base the cone would sit at an angle.
>
> Dave Smucker
>
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