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<DIV><FONT face=Arial size=2>I'm using servos in my stab on my current Aries and
what you've just pointed out is really the only concern I have about the setup.
Since the servo is buried in the stab the control arm must be at least a
certain length to extend out far enough to attach the push-rod and not bump into
the base of the stab. The result is that this ends up creating too much throw at
the servo arm and thus you're not using 100% of your servo range in moving the
elevator. I've already got the control horn position as far out as it can go but
I still only use about 65% to 70% of my servo travel.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>That being said, I really haven't noticed it being
to sensitive or not enough granularity in the elevator control and I have
not observed any problems with the elevator halves throwing unevenly. I have
just over 100 flights on the plane. I've had several other pattern pilots fly my
plane (even recently), from Advanced to FAI, and everyone seems to think it
flies very true and straight. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Now, after that glowing endorsement I must tell you
that on the new plane I'm building I plan on using pull-pull on the elevator.
Why? Ease of setup and to see if I notice any differences.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Here's a link to a picture of my stab with the
servo embedded. The servo is the <FONT face="Times New Roman" size=3><FONT
face=Arial size=2>JR DS3421 mini digital, it's an awesome servo for this
application.</FONT> </FONT></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.fototime.com/E1B3341FEB6EA82/standard.jpg">http://www.fototime.com/E1B3341FEB6EA82/standard.jpg</A> </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Keith Black</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=alan@gspceilings.com href="mailto:alan@gspceilings.com">Alan
Simmonds</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> Tuesday, November 25, 2003 6:50
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: CTE</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=054291600-26112003><</SPAN></FONT>My current thinking is that I will
still mount the servo in the same area and go with cables.Very light and
direct.<FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=054291600-26112003>> </SPAN><SPAN
class=054291600-26112003> </SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=054291600-26112003></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=054291600-26112003>Georgie</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=054291600-26112003>I am also deliberating whether to use stab mounted
elevator servos on my next model but </SPAN></FONT></FONT></FONT><FONT
face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=054291600-26112003>I'm
curious about how the geometry would work on a closed loop setup and still use
a good proportion of the servo rotation. Any
thoughts?</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=054291600-26112003>Alan</SPAN></FONT></FONT></FONT></DIV></BLOCKQUOTE></BODY></HTML>