On Mon, 23 Feb 2004 10:27:19 -0800, "Peter Duniho"
wrote:

"Stealth Pilot" wrote in message
.. .
the time, the duration, that an aircraft can remain airborne is
dependent on power setting. not necessarily the range achieved.

It affects both.

what I posted were some factual observations. dispute them if you
will, they still remain what I observed.

I'm not disputing your observations. I'm disputing that they have any
bearing at the question in hand, and in particular, your claim that they
somehow disprove the fact that for any airplane, an increase in range can be
had by reducing the power setting below the normal cruise setting.

Pete


ok my last post on this.
I had a think about your thought of different cooling drag being the
reason for the identical fuel burns at the different airspeeds. If you
ever get to fly a Tailwind take up the offer. You will experience an
aircraft with a significantly increased induced drag influence
compared to the higher aspect ratio Cessnas/commercial stuff that you
seem to be basing your comments on. It seems to me that induced drag
builds up quicker in the Tailwind at slower speeds than in the
commercial offerings.
I accept the cooling drag comment but think it is less significant
than induced drag as part of the answer.

"the fact that for any airplane, an increase in range can be
had by reducing the power setting below the normal cruise setting"

I will warn you that you are in for a surprise which may cost you the
aircraft in the right (wrong) conditions.
This was covered ad nauseum in my commercial pilot studies under
aircraft performance. I'll give a brief reiteration here.
If you have a look at the Cessna POH for the 150M you will find your
range profile graph on page 5-15. what you indicate is correct - for
the conditions that the graph was made for, which is for zero wind
conditions.
two pages over you will find a more useful graph which just gives just
endurance. you use this for calculating range in the more usual
condition of having a wind component.

CPL theory (and demonstrated calcs) says that for a tailwind or no
wind you fly slower to increase range.

for a headwind you fly faster!

I'll leave it for you to work out why.
Stealth Pilot
(...returning to my uni studies)