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<DIV><FONT face=Arial size=2>If we align the clevis attach point with the hinge
line, doesn't that "undo" the desired Ackerman effect that we need? (Thanks
Keith)</FONT></DIV>
<DIV><FONT face=Arial size=2> I agree with stuff over the
hinge line in principle, but would appreciate any informed technical explanation
(go, Dean!!), as I like to understand the "why" of stuff.</FONT></DIV>
<DIV><BR>Bob Pastorello<BR>NSRCA 199 AMA 46373<BR><A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A><BR><A
href="http://www.rcaerobats.net">www.rcaerobats.net</A></DIV>
<DIV> </DIV>
<DIV> </DIV>
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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=d.pappas@kodeos.com href="mailto:d.pappas@kodeos.com">Dean Pappas</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, November 29, 2004 10:42
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Elev. Pull pull
Question</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff
size=2>Hello Bob,</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>Go
buy some DuBro # 867 control horns. They have almost 3/4" of overhang between
the bolt and the little hole for the clevis, in the little screw-on
pieces.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>Use
those pieces, but set the bolt and nut aside, and see if the little holes line
up with the center of the hinges.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>If
not, then drill new holes in the black plastic bits so that they do line
up: one straight line through both holes and the center of the
hinge.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>Now
when you get the horns all the same length, it will be much easier to get the
throws matched in both directions.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>This
is absolutely necessary for matching two elevator halves properly, but is also
a good idea for rudders.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>The
problem with the stock setup is that the cables slacken at the ends, and
tighten at neutral.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff
size=2>While this might sound like a good thing, it is awful: the servo has to
fight the tightening cables as the surface comes closer to
neutral,</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>then
as it gets there, the surface may try to "spring" to the opposite
direction.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>The
servo and gear train will prematurely beat themselves up chasing this
problem.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>You
want the cable tension to be almost constant throughout the
throw.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff
size=2>There will be pictures of this when I get the Excelleron review out the
door.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff size=2>One
of the previous posts pointed to a website that showed the proper
geometry.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff
size=2>DuBro and Rocket City both make parts that are useful, for this
problem.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff
size=2>Check DuBro.com and put #867 into their search engine, you can see the
lonng overhang part. It's either 5/8" or 3/4" from bolt to clevis
hole.</FONT></SPAN></DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=494275614-29112004><FONT face=Arial color=#0000ff
size=2>Later,</FONT></SPAN></DIV>
<DIV> </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>
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<DIV class=OutlookMessageHeader dir=ltr align=left><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>Bob Pastorello<BR><B>Sent:</B> Friday, November 26, 2004 8:58
AM<BR><B>To:</B> NSRCA<BR><B>Subject:</B> Elev. Pull pull
Question<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>May seem obvious, but I could use some help
here....setting up my Excelleron, centers are okay, cable tensions are
pretty close, centering is good. Up elevator is fine, on Down
elevator, ONE elevator moves farther, but they track together except at the
endpoint, as close as I can tell.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Anyone have suggestions on how I'd fine tune
this out...??</FONT></DIV>
<DIV><FONT face=Arial size=2>Hope everyone had a great
T-day!!</FONT></DIV><FONT face=Arial size=2>
<DIV><BR>Bob Pastorello<BR>NSRCA 199 AMA 46373<BR><A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A><BR><A
href="http://www.rcaerobats.net">www.rcaerobats.net</A></DIV>
<DIV> </DIV>
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