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I agree!
<p>"Karl G. Mueller" wrote:
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Georgie, One thing you don't
want is a "completely neutral" set up. Itwill be very hard on the servo
gears, especially when it is tooneutral in pitch.My last years Star had
an almost neutral set up in pitchand it started stripping the gears in
the elevator servos.It took me a little while to arrive at this conclusion
since therewasn't too much left of the plane when this happened the secondtime.
My suspicions were confirmed after talking to some "AerodynamicsExperts".
Every moveable surface wants to hunt for a neutral positionand if there
is no opposite force ( Trim ) to stop it from doing thisyou will get a
certain amount of oscillation ( flutter ). Having a minuteamount of trim
offset puts a slight force from the airflow over it in onedirection and
will put a stop to any oscillation. "Completely Neutral"is not the ideal
condition. Karl G. Mueller
<br><a href="mailto:kgamueller@rogers.com">kgamueller@rogers.com</a>
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<div style="FONT: 10pt arial">----- Original Message -----</div>
<div
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><b>From:</b>
<a href="mailto:geobet@gis.net" title="geobet@gis.net">george kennie</a></div>
<div style="FONT: 10pt arial"><b>To:</b> <a href="mailto:discussion@nsrca.org" title="discussion@nsrca.org">discussion@nsrca.org</a></div>
<div style="FONT: 10pt arial"><b>Sent:</b> Friday, February 13, 2004 12:50
PM</div>
<div style="FONT: 10pt arial"><b>Subject:</b> Re: Trim</div>
"Completely Neutral" is the most complex descriptive condition that
one can conceptualize. There are so many variables, that there is only
one specific set that will approximate the required parameters to achieve
the "voila" condition.Change one thing and you no longer have "completely
neutral".
<br>Not trying to be corrective here, just stating that in my experience
completely neutral is more than elusive, but somewhat attainable under
certain conditions.
<br>What I'm currently searching for is the correct force arrangement that
will give me a neutral airplane at the C.G. that I like to fly at. I would
like to fly an airplane that adapts to me not the other way around. Elusive?
Yeah! But attainable? At this point, I think maybe!
<br>Georgie
<br>
<br>
<p>Patternrules@aol.com wrote:
<blockquote TYPE="CITE"> In a message dated 2/12/2004 11:26:21 AM
US Eastern Standard Time, natpenton@centurytel.net writes:
<blockquote
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><font face="Arial"><font size=-1>For
an airplane that goes to the canopy in knife-edge most trim charts say
, after adjusting cg , to increase the wing incidence . My " theory " says
to decrease the wing incidence. What is your theory/experience ?</font></font></blockquote>
<b> What does the plane do in the down lines, if they are good you
could just mix in a little down elevator with rudder, for the knife edge.
Nat, I would have thought that a guy that designed the Voo Doo Express
that was completely neutral, would have all the answers LOL.</b>
<b><i><font face="Arial Baltic"><font size=-1>Steve Maxwell</font></font></i></b></blockquote>
</blockquote>
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