Message-ID: <002501c38121$d38ddf20$1702a8c0@WorkGroup>
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2589176@logan.com>
Subject: Re: [FlyRotary] Re: DIE Power Calculations
Date: Mon, 22 Sep 2003 11:54:37 -0400
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Appreciate you correcting my misperception, Jim

    Like I say,  live and learn every day - or it sure becomes boring {:>)

Ed


> Ed,
> It's counter intuitive as all hell.  Took me a long time to accept it, and
very
> few people who don't flail around in the stratosphere know about that.  If
you
> were to look at a plot of atmospheric temperature against altitude, you'd
see
> that temperature decays at the adiabatic lapse rate from the surface to
the
> tropopause (about 36k', standard day) at which point it stabilizes at
something
> around -45F for the next dozen miles or so.  Speed of sound stabilizes in
the
> stratosphere at about 450 kts.
>
> From my catalog of "Little Known Facts About Unknown People" .... Jim S.
> --
> Jim Sower
> Crossville, TN; Chapter 5
> Long-EZ N83RT, Velocity N4095T
>
>
> Ed Anderson wrote:
> Ok, Jim
>
> >
> > Must have been asleep in that part of class.  I knew that in the
atmosphere
> > the density is dependent on the air temperature and the speed of sound
is as
> > well.  I guess I am still somewhat surpised that if you pressurized a
gas
> > say to 10-20 atmospheres that speed of sound would not be increased
(even
> > after you let it cool off from the compression heating).  But, you live
and
> > learn every day.
> >
> > I agree that having the intercooler before the throttle body would
eliminate
> > it from any possible disruption of the DIE FAW.  Also agree that
anything
> > you do to stabilize intake manifold air temp would also stabilize the
rpm at
> > which DIE occurs.
> >
> > Thanks Jim, I stand corrected.
> >
> > Ed
> >
> > >>  Homepage:  http://www.flyrotary.com/
> > >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>
>
>
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html