bigass diesel engine

[fahrvegnugen at cox.net (David Utley)]

> 
> From: "koabi" <koabi@mcleodusa.net>
> Date: 2004/09/11 Sat AM 10:36:15 EDT
> To: "'Dan'" <dan@angband.org>, 
> 	<scirocco-l@scirocco.org>
> Subject: RE: bigass diesel engine
> 
> Those pistons could make a great table/centerpiece to one's home


Centerpiece, my eye!  They would make better corner pieces for which to set the roof on!

Cheers,
  David 
> -----Original Message-----
> From: Dan [mailto:dan@angband.org] 
> Sent: Friday, September 10, 2004 11:29 PM
> To: scirocco-l@scirocco.org
> Subject: Re: bigass diesel engine
> 
> On Fri, Sep 10, 2004 at 09:51:46AM -0700, Ben Carter wrote:
> > 
> > What I wondered was, what would happen if they took it up past 102
> rpm? 
> >  Would it fly apart and take out everything within a mile or two or 
> > just keep producing more power.  Sucker must be awfully loud too.
> 
> I know the answer to that one... thanks to a thermodynamics of
> propulsion
> course I took years ago.  Once the fuel is injected and ignition occurs,
> 
> it takes a finite ammount of time for the flame to spread from the point
> of ignition to the boundary of the combustion chamber.  If you are
> running
> at high RPM with a large diameter piston, the piston may be near the
> bottom of the stroke by the time the flamefront reaches it's maximum
> spread. So basically, you're burning a lot of fuel and not getting any
> additional power out of it, because the piston has reached it's
> maximum travel already. This thing has a piston diameter of over 3
> feet, so it operates most efficiently at a lower RPM.
> 
> Dan
> 
> -- 
> Life in a box is better than no life at all, I expect. You'd have a
> chance 
> at least. You could lie there thinking, "Well. At least I'm not dead.
> 
> 		-- Rosencrantz and Guildenstern are Dead
> 
> 
> 
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