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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'>Funny you should mention bending the wing
tube. I don’t know how long you have been involved in pattern but in 1990
a guy named Doug Ferguson designed the FRESH AIRE. Doug was flying it on the maiden
flight and it had some roll coupling so he pulled the wing tube, leaned against
a fence post, and kicked it. He picked it up looked at it said “that
looks about right” stuck it back in the airplane took of and there was no
more roll coupling. I thought that was the coolest thing I had ever seen at the
time. <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'>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Rcmaster199@aol.com<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, October 19, 2006
8:03 PM<br>
<b><span style='font-weight:bold'>To:</span></b>
nsrca-discussion@lists.nsrca.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Partner set-up question</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>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Claude, adding dihedral to a plug in wing shouldn't be that
tough unless you are using a carbon tube. If ally, just bend it a bit, say
maybe 2 degrees in the middle of the tube and lock it in place in the fuse do
its doen't rotate.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In one of Flying Models issues, Dean talked about that kind
of situation where model pitched differently with either rudder. It's a tricky
thing to fix but not that bad. Adding about 1/2" ventral below the stab
would help.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>MattK<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In a message dated 10/19/2006 8:00:57 PM Eastern Standard
Time, geobet@gis.net writes:<o:p></o:p></span></font></p>
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margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt'>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Claude,<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have to confess that most of my opinions are based solely
on the empiricle results of building my own designs and finding out through
experience what works. I'm sure you're aware that "what works" for
one individual is not always going to be "what works" for someone
else. To demonstrate, in my opinion, the Eclipse you had with the stab at the
3/8" lowered point was as close to neutral as is possible with the design.
If you have a plane that pulls with one rudder and pushes with the other that
should be equalibrium and the mixes to trim this out should be in the 2%
bracket. You can't see 2% ! When you raised the stab back up, the rudder
that was pushing should have seen an amplification of that problem, so I would
have to conclude that your "little adjustment" altered something
additional to affect the aerodynamic effects involved.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I also like to see a design that requires as close to zero
mix as possible, but as you are aware there are many many variables to overcome
and aesthetics can often<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>complicate desirable characteristics to the point of
compromise. <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The numbers I quoted are nothing more than good sounding
measurements based on the limited info available. It really gets a lot more
detailed than can be resolved without actually seeing the airplane and doing
some actual measuring, however, the dihedral thing is probably a real close
guess.....and yes it's as tough to change as you think especially with plug in wings.
Maybe a new set of cores with the proper tube angles would be the
easiest......and yeah, I too like bantering the aerodynamic techie stuff (not
that I'm all that qualified).<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Regards,<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Georgie<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
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<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:cweimer@tconl.com" title="mailto:cweimer@tconl.com">Claude Weimer</a>
<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="mailto:nsrca-discussion@lists.nsrca.org">'NSRCA Mailing List'</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Wednesday, October
18, 2006 10:22 PM<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Re:
[NSRCA-discussion] Partner set-up question<o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Hey George,<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Are the dimensions you gave me what it takes to fix a Partner? Does
a Partner roll in knife edge? I thought the Partners were pretty good. I can
tell you I lowered the stab 3/8” on an Eclipse and it pushed to the gear
with left rudder and to the canopy with right rudder. Dave Guerin just looked
at the plane and said “the stab is too low” so I raised it the
diameter of the stab tube (about 7/16”) and with a little adjustment it
fixed it. I don’t have any mix in the airplane and it flies great. I am
not a fan of mixing problems out if you can fix it with out mixing. Any way
this experience really got me interested in these measurements. By the way how
do you go about adding dihedral to plug-in wings? Is it as difficult as I think
it is? Any way I find this kind of stuff more interesting than interrupting the
judging criteria of a figure M.<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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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