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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I don’t think its gear slop seeing
as how in one servo I’ve replace one the complete gear set twice and it
is now broken for the 3<sup>rd</sup> time. Ball bearings on the output shaft
are tight on the shaft and in the case. I would guess that the ailerons are of
average weight. They are large, but no more so than a lot of designs, 3 1/2 X 2
½ X 20. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoAutoSig><st1:PersonName w:st="on"><font size=2 color=navy
face="Times New Roman"><span style='font-size:11.0pt;color:navy'>Gene Maurice</span></font></st1:PersonName><font
size=2 color=navy><span style='font-size:11.0pt;color:navy'><o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face="Times New Roman"><span
style='font-size:11.0pt;color:navy'>gene.maurice@comcast.net<o:p></o:p></span></font></p>
<p class=MsoAutoSig><st1:place w:st="on"><st1:City w:st="on"><font size=2
color=navy face="Times New Roman"><span style='font-size:11.0pt;color:navy'>Plano</span></font></st1:City><font
size=2 color=navy><span style='font-size:11.0pt;color:navy'>, <st1:State
w:st="on">TX</st1:State></span></font></st1:place><font size=2 color=navy><span
style='font-size:11.0pt;color:navy'><o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face="Times New Roman"><span
style='font-size:11.0pt;color:navy'>NSRCA 877<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face="Times New Roman"><span
style='font-size:11.0pt;color:navy'>AMA 3408<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<hr size=2 width="100%" align=center tabindex=-1>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Del K. Rykert<br>
<b><span style='font-weight:bold'>Sent:</span></b> Saturday, February 21, 2004
6:31 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">discussion@nsrca.org</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: Another servo problem
to ponder</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><strong><b><font size=2 color=teal face="MS Sans Serif"><span
style='font-size:10.0pt;font-family:"MS Sans Serif";color:teal'> Gene.,..
I would suspect possible slop in the gear train as possible culprit if these aren't
new servos or been in for rebuild. Do you have any slop in your linkage or are
the ailerons heavy? You inferred you were in the servos doing some work..
Did you check the case for wear at the shafts points? The cases do get wore and
won't hold the shaft in tight alignment causing you to strip gears on demanding
loads such as a snap. Yes flutter and heavy surface load can also contribute
but so far I don't have enough information to jump to that conclusion.</span></font></b></strong><o:p></o:p></p>
</div>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal><strong><b><font size=2 color=teal face="MS Sans Serif"><span
style='font-size:10.0pt;font-family:"MS Sans Serif";color:teal'>
<st1:State w:st="on"><st1:place w:st="on">del</st1:place></st1:State> </span></font></b></strong><b><font
size=2 color=teal face="MS Sans Serif"><span style='font-size:10.0pt;
font-family:"MS Sans Serif";color:teal;font-weight:bold'><br>
<strong><b><font face="MS Sans Serif"><span style='font-family:"MS Sans Serif"'>
NSRCA - 473</span></font></b></strong></span></font></b> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><strong><b><font size=2 color=teal face="MS Sans Serif"><span
style='font-size:10.0pt;font-family:"MS Sans Serif";color:teal'>
<st1:State w:st="on"><st1:place w:st="on">Del</st1:place></st1:State></span></font></b></strong><o:p></o:p></p>
</div>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<blockquote style='border:none;border-left:solid teal 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
</div>
<div style='font-color:black'>
<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:gene.maurice@comcast.net" title="gene.maurice@comcast.net">Gene
Maurice</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:discussion@nsrca.org" title="discussion@nsrca.org">Nsrca-List</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Saturday, February
21, 2004 7:10 PM<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Another servo
problem to ponder<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Please help. I have stripped aileron servo gears FOUR times.
At first I thought it was infant mortality followed by the dumb ass missed a
piece of crud in the servo case. I don’t think that’s what happened<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Here’s the setup. The plane is an Aries, JR 8231
servos. Plane and servos are less than four months old: about 60-70 flights.
Right aileron has broken 3 times and the left has broken once (one each today).
The breakage has always been slightly right of center on the output gear. There
is no static binding. The hinge lines are sealed. I can’t be
positive but I believe the gears are breaking during a down line snap. BTW, I
snap to the right. I don’t believe its flutter because the breakage is
NOT at center. I don’t believe its excessive travel because the breakage
is not at the extremes of travel.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Can the initial load of a snap place enough load on an 88
oz. servo to break a gear? I have used this exact same servo setup in two other
planes. I did break a gear one in one of those planes. Again, I just chalked it
up to wear.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Confused and at a loss in <st1:place w:st="on"><st1:City
w:st="on">Plano</st1:City></st1:place>. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoAutoSig><st1:PersonName w:st="on"><font size=2
face="Times New Roman"><span style='font-size:11.0pt'>Gene Maurice</span></font></st1:PersonName><font
size=2><span style='font-size:11.0pt'><o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 face="Times New Roman"><span style='font-size:
11.0pt'>gene.maurice@comcast.net<o:p></o:p></span></font></p>
<p class=MsoAutoSig><st1:place w:st="on"><st1:City w:st="on"><font size=2
face="Times New Roman"><span style='font-size:11.0pt'>Plano</span></font></st1:City><font
size=2><span style='font-size:11.0pt'>, <st1:State w:st="on">TX</st1:State></span></font></st1:place><font
size=2><span style='font-size:11.0pt'><o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 face="Times New Roman"><span style='font-size:
11.0pt'>NSRCA 877<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 face="Times New Roman"><span style='font-size:
11.0pt'>AMA 3408<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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