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on 1/31/03 11:37 PM, Jim Phelps at [EMAIL PROTECTED] wrote:

> You keep saying flying high. What alitude are you talking about.  Maybe
you
> are flying so high lack of oxygen is clouding the facts.  Just
kidding...  I
> don't like the long grind getting up there (whereever that is).  I enjoy
> seeing the ground from a closer perspective. If I want to see little
towns
> and roads and cars I'll fly the airlines.. Jim Phelps 2749H
> 
-----------------------------------------------

Yo, Jim

I'll have to admit that something caused me to post my "William R. Bayne
Re:
0200 Conversion 1/31/03 2:03pm" comments with inadequate reference for you
to tell it was a response.  Lack of oxygen seems a good excuse!  Sorry.

To see the subject thread where I tried to pick it up, see MAGIC VAC's
post
of 1/30/03, 9:36am Re: O200 Conversion (TECH Archive).

On longer cross-country flights I usually pick between five and eight
thousand feet MSL (depending on how high the rocks are, where the winds
are
most favorable, and the odd/even altitude choices of my course heading.
If
something unexpected happens at such altitudes in unfamiliar territory,
the
selection of emergency landing sites is greater than at "pattern
altitude".

It is common in summer around Albuquerque, NM (and the continental divide)
for the density altitude to be as much as four thousand feet higher than
the
MSL elevation.  At 1400 lb. gross weight in a "D" Model (with an
advertised
ceiling of 12,000'), heading over seven thousand foot high terrain with
one
thousand foot clearance and such four thousand foot increase in density
altitude, you can't climb higher than your 8,000' MSL!

If my recollection is not still affected by insufficient oxygen, the
aircraft ceiling is a figure taken from observed conditions as corrected
to
a "standard day".  These corrections remove the usual variation between
density altitude and actual altitude.  Think of this as a perfect "virtual
sky" representing conditions seldom actually outside when and where we
fly.

Your coupe and your brain travel in a sky where density altitude is the
only
reality.  The coupe will do more than most think, but there are limits no
one can exceed.  The challenge is always to find them before they find
you.

Regards,
 
William R. Bayne
<____|(o)|____>
(copyright 2002)

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