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<DIV><FONT face=Arial size=2>That's wierd indeed.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>What kind of linkage are you using? There could be
slop in the gear train, or between the output gear and the arm
itself.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>But most likely the culprit might be slop in the
linkage itself. If airframe vibration was the problem, a lot more would be
vibrating than one control surface.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If it were me.....I'd begin by checking for ANY
play in the linkage, then replacing worn or ill fitting parts until it's rock
solid.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If it vibrates while flying, then I'd also check
the gap between the surface and the wing: seal them. I'd do that anyway, as it
makes flying more consistent.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Also be sure the hinges are tight and not allowing
the surface to flex too much at the hinge line. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Also make sure the prop is balanced. APC props are
hit and miss in this regard. I've gotten props from them where the hole is off
center, and they were impossible to balance. Before I found this, I ran it 3
times and the plane developed several stress cracks. Ungood, so now I balance
EVERY prop before installing it. (Which I should have been doing all along,
stupid me). </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>And lastly, some airframes (particularly the Gator
planes) seem to be a flying tuning fork, and resonate badly at certain RPMs. Not
much you can do here.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Good luck,</FONT></DIV>
<DIV><FONT face=Arial size=2>-Mike</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE dir=ltr
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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=davidsmith@ns.sympatico.ca
href="mailto:davidsmith@ns.sympatico.ca">Dave Smith</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 31, 2004 9:31 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Gator Giles G202gt</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Mike: I agree with your
comments,having built two of them. The first being a tad heavy at 12 pounds!
That was 4 years ago.</FONT></DIV>
<DIV><FONT face=Arial size=2>The current one is 10 pounds,six ounces which
includes 2 oz.of tail weight. Some of which may be removed as I have only 26
flights on it.</FONT></DIV>
<DIV><FONT face=Arial size=2>OS 140Rx,17x12 APC with Greve pipe,O.S.(Hatori?)
header,and each wing is shortened 1" by clipping the tip. Flies very well,even
snaps pretty good.</FONT></DIV>
<DIV><FONT face=Arial size=2>There always seems to be a
"but"..... The left aileron at about 3 or 4 clicks of
throttle vibrates worse than anything I have seen in this regard,yet the right
aileron is quite smooth. At other RPMs all seems good. I have had to
replace the out put gear in a new Futaba 9150,as the wheel would rock back and
forth. Have not flown since.</FONT></DIV>
<DIV><FONT face=Arial size=2>Mount is a Hyde,the one with aluminum beams and
built in nose ring.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Any suggestions as to how to eliminate the
vibration in the left aileron,as I am not sure I can fly it as is.Will at
least have to try to avoid that particular position on throttle
stick.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,,,,,,,,,,,,,,,,,,,,,,,Dave
#943</FONT></DIV></BLOCKQUOTE></BODY></HTML>