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<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=cchariandy@yahoo.ca href="mailto:cchariandy@yahoo.ca">colin
chariandy</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=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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