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<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>Hello
Vicente,</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>The
trimming adjustment procedure for right rudder with throttle couple I will
describe was developed with the Excelleron that I reviewed for Model Aviation. I
synthesized this method, based on the several different methods I heard
described. As Jason said, some of them did not fly
right. The Excelleron is a very good flier, and with a dependable
muffled 120 two-stroke I would use it a low-hassle practice ship. Like most
airplanes, it required about 2-3/4" of right thrust and a small amount of right
rudder to make the plane trim normally. The predictable unwanted effects in spin
entries and loops (especially the outsides) were present but not unusually
bad.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>So
what I did was </FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>1) Set
the rudder dead straight and not touch the rudder trim lever
again.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff
size=2>Confirm that this is really the middle with repeated upright and inverted
stalls/spin entries, to make suer the plane does not have a bias to either
side.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>2)
reduce the right thrust to a "guess" setting that is enough for whatever
throttle setting and speed you fly your normal level lines.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>You
test this with shallow climbs at 2/3 throttle, and small loops at that
same throttle. I ended up with about 1-3/4 degrees. </FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>3) Set
up a throttle into rudder curve mix and keep the percentages at zero from idle
up to 2/3 throttle. Then add a slop from there to full
throttle,</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>and
adjust those upper coupling ratios to get a straight vertical
line.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=932202016-21022006></SPAN> </DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff
size=2>Limitations: </FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>Never
fly above 2/3 throttle in level flight.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>Never
push the throttle up too soon before pulling or pushing to a
vertical.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>Avoid
sudden throttle changes</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>In
other words, this is not appropriate if you have not mastered purposeful
throttle management.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>Hope
this helps,</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006><FONT face=Arial color=#0000ff size=2>Dean
P.</FONT></SPAN></DIV>
<DIV><SPAN class=932202016-21022006> </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>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> vicenterc@comcast.net
[mailto:vicenterc@comcast.net]<BR><B>Sent:</B> Monday, February 20, 2006 4:58
PM<BR><B>To:</B> NSRCA Mailing List; NSRCA Mailing List<BR><B>Cc:</B> Dean
Pappas<BR><B>Subject:</B> Re: [NSRCA-discussion] Rudder mix instead of right
thrust?<BR><BR></FONT></DIV>
<DIV>Dean,</DIV>
<DIV> </DIV>
<DIV>Could you paste the article here?</DIV>
<DIV> </DIV>
<DIV>Thanks,</DIV>
<DIV> </DIV>
<DIV>Vicente Bortone</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">--------------
Original message -------------- <BR>From: "Dean Pappas"
<d.pappas@kodeos.com> <BR><BR>> I wrote about the throttle-rudder
couple trimming procedure in FM about nine <BR>> months ago. <BR>> I
also described the shortcomings for those pilots still learning optimal
<BR>> throttle use. <BR>> Dean Pappas <BR>> <BR>> -----Original
Message----- <BR>> From: nsrca-discussion-bounces@lists.nsrca.org on
behalf of George <BR>> Miller <BR>> Sent: Sun 2/19/2006 11:08 AM
<BR>> To: NSRCA Mailing List <BR>> Cc: <BR>> Subject:
[NSRCA-discussion] Rudder mix instead of right thrust? <BR>> <BR>>
<BR>> Somewhere I've seen a description of Jason's technique to set up
rudder <BR>> mix instead of right engine thrust, but I can't find it.
Could someone please <BR>> re-post this or re-iterate it. I can't believe
I didn't save the message!-DOH! <BR>> <BR>> I can set up the mix in
the transmitter...what I really want to know is <BR>> what starting
percentages are reasonable, and how to fine tune the mix. <BR>> <BR>>
thanks, <BR>> <BR>> George <BR>>
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