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<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=250354416-22082004>Peter,</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=250354416-22082004> Forgive my ignorance - I am returning to pattern
flying after a long hiatus so I'm not familiar with the design (Alliance). Is
the rudder hinge line exactly perpendicular to the thrust line? Most of the "new
style" pattern ships seem to be this way but... in the old days I remember
designs that had the rudder hinge line canted forward or back. This will of
course change the way the plane pitches in knife edge flight. In addition to
this, the shape of the rudder can cause similar problems. It's odd that your
vertical maneuvers are OK. I don't know about wing incidence but you can usually
rule that out with some other simple trim tests (power OFF vertical dive). If
this shows signs of not being correct, the thing to look for would be "too much
incidence". It sounds like you have already covered this though. The only other
"trick" you might try is trimming both ailerons up a little bit. Maybe someone
more knowledgeable (and up-to-date) can answer your question, but I'd be
interested in the answer as well.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=250354416-22082004></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=250354416-22082004>
<P><FONT size=2>John Pavlick<BR><A href="http://www.idseng.com/"
target=_blank>http://www.idseng.com</A><BR> </FONT>
</P></SPAN></FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org
[mailto:discussion-request@nsrca.org]<B>On Behalf Of </B>Peter
Pennisi<BR><B>Sent:</B> Sunday, August 22, 2004 7:30 AM<BR><B>To:</B>
discussion@nsrca.org<BR><B>Subject:</B> Zn-Line Alliance trimming
question<BR><BR></DIV></FONT>
<DIV class=Section1>
<BLOCKQUOTE
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<DIV>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt">Hey
Guys,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt">I am starting to
get a few flights under my belt with this model. I am happy with the way the
model performs in most areas except in rolls were rudder is being used. My
model suffers from severe pitching to belly in knife edge. I think I am
running about 17% on both left and right rudder. Mind you I fly soft so it
isn’t as bad as it sounds. It is about 1/8<SUP>th</SUP> inch up elevator on
full rudder.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt">My problem is I am
finding it difficult to roll cleanly for example in reversed point rolls. My
old model would do this without a problem (That sort of excludes my ability
being the problem). Whenever I touch the rudder in any part of the roll the
model gets all out of shape. If I roll vertically either continuously or
point rolls the model tracks perfectly.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt">The CG is exactly
were CPLR runs his and the elevator trims neutral. The model also dives and
climbs perfectly straight. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt">Anyone have any
experience with this design? <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt">Why does this
design pitch so badly in knife edge?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt">Can wing incidence
be an issue here?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt">Regards,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=navy face=Arial size=2><SPAN
style="COLOR: navy; FONT-FAMILY: Arial; FONT-SIZE: 10pt"><BR>Peter<o:p></o:p></SPAN></FONT></P></DIV></DIV></BLOCKQUOTE></DIV></BLOCKQUOTE></BODY></HTML>