[OT, yet neato] hear an engine sing

[bkpros@shaw.ca (Big Kid)]

Yup

----- Original Message -----
From: "Dan Smith" <sad_rocc@veedub.com>
To: "Robbie Cotner" <robw_z@yahoo.com>; <scirocco-l@scirocco.org>
Sent: Wednesday, December 18, 2002 3:30 PM
Subject: Re: [OT, yet neato] hear an engine sing


> I got a forbidden to access page. Anyone else have this problem?
>
> Dan
>
> Hey all, I got this from the Datsun Z list, very interesting.  btw, the
engine doesn't start "singing" until almost 30 seconds into the recording,
so don't get discouraged:
>
> > Load the link and press play.
> >
> > http://astro.temple.edu/~kmr/Chauffe2.mp3
> >
> > First you'll hear a 10-cylinder, 750 horsepower Asiatech F1
> > engine being warmed up. Then it performs a rousing version
> > of "When The Saints Come Marching In", to the delight of
> > assembled pit staff and journalists.
> >
> > Here's how the magic was achieved (technical/musical details
> > via F1 Racing magazine):
> >
> > As we all know, a V10 engine produces five combustions per
> > revolution at a frequency per second of 60/(5 x revs per
> > minute), which equals 12/rpm. Therefore, to work out the
> > revs you need to hit a particular musical note, you multiply
> > the note's frequency by 12. To play a 440Hz 'A', for example,
> > you need 5,280rpm.  For 'C', use 3,139rpm, for 'F' 4,191rpm,
> > and so on.
> >
> >
> > Asiatech's French technicians (the engine, despite its name,
> > is derived from a Peugeot design) simply programmed their
> > engine to run through the various rev/note ranges in the
> > correct sequence. The result is delightful. And think of the
> > possibilities - BMW's F1 engine, which howls all the way to
> > 19,050rpm, could rip through the entire Hendrix songbook.
> >
> > Even better: imagine a massed NASCAR choir performing "The
> > Star Spangled Banner"! Being eight-cylinder engines, the
> > frequency per second would be 60/(4 x revs), which means
> > you'd multiply the note frequencies by 15 instead of 12: 'A'
> > would arrive at 6,600rpm, 'C' at 3,923rpm, 'F' at 5,238rpm,
> > etc.
> >
> > Mark my words, someone will be getting rich at Daytona next
> > year selling a CD of NASCAR patriotic anthems. Send some of
> > the royalties my way.
>
>
>
>
>
>
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