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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>That’s not rudder flutter but fuselage
flutter or elasticity!!! Way different problem. :>) <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Bill <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <st1:PersonName
w:st="on">discussion-request@nsrca.org</st1:PersonName> [mailto:<st1:PersonName
w:st="on">discussion-request@nsrca.org</st1:PersonName>] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Ron Van Putte<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, April 28, 2005
1:16 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">discussion@nsrca.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: Rudder counterbalance
?</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><br>
On Apr 28, 2005, at 1:37 PM, Gray E Fowler wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><?smaller>I am in reality recommending getting above that buzz speed
that you spoke of, using stiffness. I am proposing that this is an easy thing
to do without adding counter weight or building a brick fuselage. My plane
never buzzes or flutters, but then again I have never used full throttle while
diving at the ground to find my buzz point, which is no doubt there somewhere.<?/smaller>
<br>
<?smaller>All of this assumes adequate push rods or pull pull stuff.<?/smaller>
<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><br>
Now I think I understand what Gray is referring to. I have seen some of these flimsy
creations, which you can't fly at full throttle for long and always vertically
upward. No full throttle operation level or with the nose down. Those are
simply puny airplanes, which would benefit from stiffening. I saw one pilot
give the command for an aileron roll and the wings rolled more than 90 degrees
before the tail started rotating. That's flimsy!<br>
<br>
Ron Van Putte<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<?smaller>"</span></font><tt><?fontfamily><?param Courier New><font
size=2 face="Courier New"><span style='font-size:10.0pt'> However, I disagree
that increased stiffness is the best</span></font><?/fontfamily></tt><br>
<?/smaller><tt><?fontfamily><?param Courier New><?smaller><font size=2
face="Courier New"><span style='font-size:10.0pt'>way to go. Most of what
people call "flutter" is really "control </span></font><?/smaller><?/fontfamily></tt><br>
<tt><?fontfamily><?param Courier New><?smaller><font size=2 face="Courier New"><span
style='font-size:10.0pt'>surface buzz", because it is essentially a
one-dimensional phenomenon. </span></font><?/smaller><?/fontfamily></tt><br>
<tt><?fontfamily><?param Courier New><?smaller><font size=2 face="Courier New"><span
style='font-size:10.0pt'>Flutter is reserved by experts in the area to refer to
oscillatory</span></font><?/smaller><?/fontfamily></tt><br>
<tt><?fontfamily><?param Courier New><?smaller><font size=2 face="Courier New"><span
style='font-size:10.0pt'>phenomenon involving two or more degrees of freedom
(like wing </span></font><?/smaller><?/fontfamily></tt><br>
<tt><?fontfamily><?param Courier New><?smaller><font size=2 face="Courier New"><span
style='font-size:10.0pt'>bending/torsion or wing bending/torsion/aileron deflection).</span></font><?/smaller><?/fontfamily></tt><?smaller>"<br>
<?/smaller><br>
<br>
<?smaller>Gray Fowler<br>
<?/smaller><?smaller>Principal Chemical Engineer<br>
<?/smaller><?smaller>Composites Engineering<o:p></o:p></p>
<?/smaller></div>
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