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<DIV><FONT face=Arial size=2>Please elaborate:</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>"mount was stiffened
slightly"</FONT></DIV>
<DIV> <BR>John Ferrell <BR>6241 Phillippi Rd<BR>Julian NC 27283<BR>Phone:
(336)685-9606 <BR><A
href="mailto:johnferrell@earthlink.net">johnferrell@earthlink.net</A><BR>Dixie
Competition Products<BR>NSRCA 479 AMA 4190 W8CCW<BR>"My Competition is Not
My Enemy"<BR></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=Eric.Henderson@gartner.com
href="mailto:Eric.Henderson@gartner.com">Henderson,Eric</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> Monday, May 12, 2003 8:50 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> 2-c Hydemount - Mintor
1.70</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff size=2>One
thing that I did notice while breaking-in the 1.70, (there is not much
else to do except observe during this process), was the air-frame
vibration.</FONT></SPAN></DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff size=2>It
was a very good result. I am using a 1.40 Hydemout A , 3/4 back plate to clear
the header, with no nose ring. Because the 2-c shakes a lot less (than a 4-c)
the mount was stiffened slightly. The result was a very smooth airframe
performance . The controls did not buzz except some elevator at just above
idle, for a brief moment. there was no aileron blur at
all.</FONT></SPAN></DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff size=2>I
like this type of behavior because the servos last longer and there is less
current drain due to the servo fighting the control
service.</FONT></SPAN></DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff
size=2>Regards,</FONT></SPAN></DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff
size=2>Eric</FONT></SPAN></DIV>
<DIV><SPAN class=430543312-12052003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org
[mailto:discussion-request@nsrca.org]<B>On Behalf Of
</B>Henderson,Eric<BR><B>Sent:</B> Tuesday, April 29, 2003 12:02
PM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> RE: RE: RE: 3M
Engines<BR><BR></FONT></DIV><!-- Converted from text/rtf format -->
<P><SPAN lang=en-us><FONT face=Arial size=2>There is a time when a 2-c idles
so low that it "bounces" as much as a 4-c at idle.</FONT> <FONT face=Arial
size=2>B</FONT><FONT face=Arial size=2>asically it is missing a beat so that
it is firing at the same frequency as a slow running 4-c. At around 2000-2500
rpm they both smooth out. </FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>I have extensive time on 1.40, and
now 1.60, 2-cycles that lets me compare them with the big YS 4-c's and how
they run and shake a plane. I have run both engine types with and without nose
rings. </FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>My goal was to get a plane that is
shaken and "punished" the least! (Not ignoring sound issues BTW). I have
observed that the best set-up is a non-nose ring Hydemount. All
nose</FONT><FONT face=Arial size=2>-</FONT><FONT face=Arial
size=2>ring</FONT><FONT face=Arial size=2>s</FONT><FONT face=Arial size=2> add
to airframe vibration. The</FONT><FONT face=Arial size=2>y</FONT><FONT
face=Arial size=2> provide poor isolation and have to be set with no side
pressures to be</FONT> <FONT face=Arial size=2>iso-</FONT><FONT face=Arial
size=2>effective.</FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>All my nose ring installations
cause aileron-buzz at certain - read most used in flight - rpm settings. This
just kills the digital aileron servo! </FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>The 4-c is the worst culprit by
far. The DZ is a shaker and this may be why the fuel foams and causes dead
stick's at low rpms. The L is smoother but the more nitro you use the more
"bang" and thus the more energy to dissipate. </FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>The smoothest set-up, by far, is a
2-c with no-nose ring. There appears to be no problem with the engine and prop
torquing/twisting. The newer planes have room for a bigger
hockey-puck-rear-plate. Planes with FG cowls are much easier to install
without Herculean engineering of a nose ring support.</FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>I have put 4 and 2-cycles in the
same airframe on the same mounts and same range of props and I have seen a
distinctly better isolation when the 2-c is installed. The current batch of
Webra 1,45, OS 1.40 RX and FI users can probably tell us what they are
seeing.</FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>The "Mintor-men" will soon be
reporting as well - right guys?</FONT><FONT face=Arial size=2>
</FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>From a noise point of view my
Hydeout with an L</FONT><FONT face=Arial size=2>,</FONT><FONT face=Arial
size=2> is quieter that my Temptation with an OS 1.60</FONT><FONT face=Arial
size=2>,</FONT><FONT face=Arial size=2> that is quieter than my Hydeout with a
DZ</FONT><FONT face=Arial size=2>.... Not by much however...</FONT></SPAN></P>
<P><SPAN lang=en-us><FONT face=Arial size=2>Regards,</FONT></SPAN> </P>
<P><SPAN lang=en-us><FONT face=Arial size=2>E.</FONT></SPAN> </P><BR><BR>
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