RE: Regulated Magnet Wire?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>

Hi Mark

Here is one answer to your mathematical question. There are many such
formulas, but here is one.

Pi = Arctan(x) + Arctan(y) + Arctan((x + y)/(xy - 1)) where x > 0 and xy >
1. Take  x and y as real numbers, or take x and y in radian measure.

In particular, take x = 1 and y = 2. Then Pi = Arctan(1) + Arctan(2) +
Arctan(3). 

To verify the numerical example, set your hand calculator in the radian
mode. 

Godfrey Loudner


> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Tuesday, May 22, 2001 10:14 PM
> To:	tesla-at-pupman-dot-com
> Subject:	Re: Regulated Magnet Wire?
> 
> Original poster: "Mark Broker by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <broker-at-uwplatt.edu>
> 
> 
> >
> >
> > I searched around the web and FBI/ATF sites for info on this and came up
> > with zero.  Maybe ask back at the motor shop where the guy heard this
> from.
> >  Maybe a local politician or something shooting off their mouth over
> some
> > local incident or something.  There does not seem to be any fact behind
> it.
> >  I would guess that there was some off-the-cuff comment or editorial in
> > some trade magazine somewhere...  I could call the ATF but I hate to
> give
> > them a reason to laugh at "my" stupidity :-)) 
> 
> Another urban legend, is my feeling.
> 
> 
> >
> > Of course, this "regulation" would fail miserably not only in being
> > impossible, but making the politicians look stupid (we all know how
> > difficult that is :-))...  Reminds me when they wanted to ban electronic
> > solder or pass a law that pi = 3.000... :-))) 
> 
> 2.9, actually.  In a case down south, a tire or automobile company was
> sued
> because (I think - hazy memory) they were caught speeding, despite the
> speedometer reading approximately the speed limit.  The defense was that
> if you
> let pi=2.9, then he was going the correct speed, or something like that.
> pi ~
> 3.141592654 ~ 2.9.  The auto company won, of course, since most "lay"
> people
> are mathematically ignorant....   (someone who knows the equation for pi
> as the
> sum of 3 arctangents PLEASE email me offlist - I can't remember it, and
> it's
> killing me!)
> 
> One of my physics profs has pi written out to 1000 digits (using
> Mathematica),
> with "Which is roughly 2.9" hand written below.  This was his story.
> 
> 
> >
> > Bombs can be made out of everything, so restricting everything is a
> > solution :-)) 
> 
> I remember arguing with Chris over this matter about a year ago when he
> was
> planning Avalon..... remember that one, Chris?  ;-)
> 
> 
> Mark Broker
> G-5 Geek #19 (or something like that)
> 
> 
> 
>