Treatise on intake systems

[James Boughton]

I think I covered myself on this with the reply to Wayne Strasser's
comments, but to make sure g is actually gamma, the ratio of specific
heats.  It is listed in numerous tables on properties of air.  If it is not
listed the specific heats (constant pressure and constant volume) should
be listed thus gamma can be calculated by the ratio of specific heat at
constant pressure to specific heat at constant volume.

Jim Boughton
boughton at bignet.net

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From: 	James Weiler[SMTP:james at brc.ubc.ca]
Sent: 	Tuesday, August 12, 1997 7:54 PM
To: 	diy_efi at coulomb.eng.ohio-state.edu
Subject: 	Re: Treatise on intake systems



On Tue, 12 Aug 1997 wstrass at eastman.com wrote:

> (The speed of sound is simply (gRT)^0.5 where g and R are considered
> constant.  If you wanted to be rigorous you could actually vary g and R
> for temperature, but probably not worth it.)
> 
> Jim:  I have a question....how can g (is this gravitational constant?) and
> R (the universal gas constant) vary with temperature?

n is the number of moles of gas.  Part of this formula comes from the 
ideal gas law PV=nRT except he's using g instead of n.  R is a constant 
and so there is no variation.

later
jw