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RE: Regulated Magnet Wire?
Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>
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) +
To verify the numerical example, set your hand calculator in the radian
> -----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>"
> > 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
> > Maybe a local politician or something shooting off their mouth over
> > local incident or something. There does not seem to be any fact behind
> > 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
> > 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
> 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"
> 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
> killing me!)
> One of my physics profs has pi written out to 1000 digits (using
> 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
> planning Avalon..... remember that one, Chris? ;-)
> Mark Broker
> G-5 Geek #19 (or something like that)