<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2802" name=GENERATOR></HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>If that can be worthy of a patent, the inmates are
in charge of the asylum!</FONT></DIV>
<DIV> </DIV>
<DIV>John Ferrell <BR><A
href="http://DixieNC.US">http://DixieNC.US</A><BR></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=bob@toprudder.com href="mailto:bob@toprudder.com">Bob Richards</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> Monday, February 13, 2006 9:08
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Direct
Servo Drive</DIV>
<DIV><BR></DIV>
<DIV>My feeling exactly.</DIV>
<DIV> </DIV>
<DIV>Bob R.</DIV>
<DIV><BR><BR><B><I>Ed Alt <<A
href="mailto:ed_alt@hotmail.com">ed_alt@hotmail.com</A>></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<META content="MSHTML 6.00.2900.2802" name=GENERATOR>
<STYLE></STYLE>
<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 doub! le 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>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> </BLOCKQUOTE></BLOCKQUOTE>
<P>
<HR>
<P></P>_______________________________________________<BR>NSRCA-discussion
mailing
list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</BLOCKQUOTE></BODY></HTML>