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<DIV><FONT face=Arial size=2>Never have seen it before, but I guess the main
question I have concerns the potential for loss of effective torque transmitted
to the control surface. I see that they claim it's better due to no
losses. That would be true in the sense that you don't lose that little
bit in the linkage friction etc., but if you only want, say, 25 degrees of
surface throw each direction, it would appear that you would have to limit the
servo travel to 25 degrees as well. If that's true, then you have less
mechanical advantage for a given degree of movement for the surface, since you
would normally have a servo traveling about double that distance. The
control surface speed would be quicker, assuming the load is handled without any
blowback or slowdown of movement due to the effectively lower torque transmitted
while moving. Maybe I'm not seeing it right, but it looks like it might
not be such a good thing to use, unless you were already planning on having
something close to a 1:1 correspondence of degrees of servo arm movement to
degrees of surface travel.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ed</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=brian_w_young@yahoo.com href="mailto:brian_w_young@yahoo.com">brian
young</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, February 12, 2006 11:43
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] Direct Servo
Drive</DIV>
<DIV><BR></DIV>
<DIV>Anyone seen these in use?</DIV>
<DIV> </DIV>
<DIV><A
href="http://durantdirectdrive.com/id66.html">http://durantdirectdrive.com/id66.html</A></DIV>
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