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<DIV>
<DIV>Just curious.... what radio are you using? Do you have mixes
set up for roll coupling? If so, do you have the trims set to
"active" in the mixes? If not, this could be the reason for the
pitching. Without active trim in the mixes, all offset will be based from
the original servo position in setup, not from the current flying position after
the trim was moved.</DIV>
<DIV> </DIV>
<DIV>Rex</DIV>
<BLOCKQUOTE
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="FONT: 10pt arial"><B>From:</B> <A
title=mailto:Tom.Koenig@actewagl.com.au
href="mailto:Tom.Koenig@actewagl.com.au">Koenig, Tom</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, September 11, 2006 2:42
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Trimming
question.</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=573513321-11092006><FONT face="Comic Sans MS"
color=#0000ff>All-Dean,</FONT></SPAN></DIV>
<DIV><SPAN class=573513321-11092006><FONT face="Comic Sans MS"
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=573513321-11092006><FONT face="Comic Sans MS" color=#0000ff>I
think you could be onto something there. I like to fly on the edge of
nose heavy, and I could sympathize with Colin. My Synergy exhibits almost the
same tendencies. It is not a heavy plane at 4.7 kg, but the CG is forward.
Hmmmmmmm-you boys have me thinking again. I notice it biggest when travelling
as every field I go to is at lower altitude. The biggest and costliest time
was during the Trans Tasman comp in New Zealand-it was like flying through
soup!</FONT></SPAN></DIV>
<DIV><SPAN class=573513321-11092006><FONT face="Comic Sans MS"
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=573513321-11092006><FONT face="Comic Sans MS" color=#0000ff>I
have always assumed it was an air density thing. I have experienced exactly
what Colin describes.</FONT></SPAN></DIV>
<DIV><SPAN class=573513321-11092006><FONT face="Comic Sans MS"
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=573513321-11092006><FONT face="Comic Sans MS"
color=#0000ff>Tom</FONT></SPAN></DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of </B>Dean
Pappas<BR><B>Sent:</B> Tuesday, 12 September 2006 3:36 AM<BR><B>To:</B> NSRCA
Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] Trimming
question.<BR><BR></FONT></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial size=2>Hi
Colin,</FONT></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial size=2>By any chance, is
your plane relatively heavy, have a particularly high wing loading, propped to
fly very slowly, or set up relatively nose-heavy?</FONT></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial size=2>The reason I ask
is that back in the late eighties, I clipped the wings of one of my early
Turnaround designs </FONT></SPAN><SPAN class=571581117-11092006><FONT
face=Arial size=2>in order to fly faster.</FONT></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><SPAN class=571581117-11092006><FONT
face=Arial size=2>This was back when we were in the middle of a wild
overcorrection from flying slow and small in this country to flying fast,
fast, fast! Then things started to settle down.</FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial size=2>Actually, I
clipped it twice, once from 68" span to 64" and then to 60. I should
have left the plane at 64" span. When I made the second clip, the plane
developed </FONT></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial size=2>almost
the same </FONT></SPAN><SPAN class=571581117-11092006><FONT face=Arial
size=2>symptom you described. It pulled to the canopy in the vertical down
line when the elevator was trimmed for a hot day.</FONT></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial size=2>It also looked
like it flew droopy-drawered (tail low) on hot days. I moved the CG back until
the elevators looked like they were in exactly the same spot, and lived with
what little was left.</FONT></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial size=2>There was no
suitable electronic fix back then, with either a Futaba PCM 512 or a JR
PCM9.</FONT></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial size=2>My hypothesis is
that the sensitivity to air density happens when the plane requires lots of
"up" trim to fly. What do the elevators look like when trimmed on a hot
day?</FONT></SPAN></DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=571581117-11092006><FONT face=Arial
size=2>later,</FONT></SPAN></DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman">d.pappas@kodeos.com</FONT> </P>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of </B>colin
chariandy<BR><B>Sent:</B> Monday, September 11, 2006 9:53 AM<BR><B>To:</B>
NSRCA Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] Trimming
question.<BR><BR></FONT></DIV>
<DIV>No, I'm using the MK bellcrank.</DIV>
<DIV> </DIV>
<DIV>If the problem was only related to the length of the pushrods, then
when I re-trim the knife edge performance should return to normal. Thats not
the case. The plane pushes to the bottom in the cold and is dead straight on
hot days.</DIV>
<DIV> </DIV>
<DIV>Colin.<BR><BR><B><I>Lance Van Nostrand
<patterndude@comcast.net></I></B> wrote:</DIV>
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<DIV><FONT face=Arial size=2>My guess is you have the deps system.
carbon fiber does not have as much shrinkage as the rest of your
plane.</FONT></DIV>
<DIV><FONT face=Arial size=2>--Lance</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mailto:cchariandy@yahoo.ca
href="mailto:cchariandy@yahoo.ca">colin chariandy</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, September 10, 2006
11:09 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion]
Trimming question.</DIV>
<DIV><BR></DIV>
<DIV>I noticed recently that I need to add a bit of down trim as the air
temperature drops....maybe as much as 4 beebs going from 30+ days to
15C. That upsets the knife edge trim on the aircraft. </DIV>
<DIV> </DIV>
<DIV>Is that normal, or do I have something set a bit marginally, like
CG or wing incidence?</DIV>
<DIV> </DIV>
<DIV>Do you guys typically have a "cold weather set-up" ?</DIV>
<DIV> </DIV>
<DIV>Colin.</DIV>
<DIV>
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