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<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS" color=#0000ff>Hi
lads,</FONT></SPAN></DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS"
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS"
color=#0000ff>This is what I have found to work well on my Merlin designs. Now,I
am ready to be corrected by those much more knowledgeable than myself-I just do
things empirically!</FONT></SPAN></DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS"
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS" color=#0000ff>I
ended up using a percentage of the span of the panel (60% in my case). I have
tried various sizes, but somewhere in the 55-65 percentage area worked
well. I also came in from the tip by 30 mm, to get the aileron out of the
tip vortex. Now that I am flying a Synergy with the ailerons running all the way
out, I'm not so sure how much of a difference it makes. Maybe servo life is a
bit shorter, but that is hard to quantify with the YS shaking things to bits
anyway. As far as aileron chord dimension goes, well, I have tried various sizes
there too, and I do use different percentages at the tip vs inboard aileron. I
actually like to run a slightly smaller percentage at the tip. I felt it to give
me a more 'linear' feel to the aileron. </FONT></SPAN></DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS" color=#0000ff>I
also applied this to 'elevator' design. I wanted the tips of the elevator to be
less effective. I felt it helped pull corners better afterwards, as in this case
the inboard section is doing more of the work. But now I am running a
straight elevator hinge line on the
Synergy...............L.O.L</FONT></SPAN></DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS"
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS" color=#0000ff>It
all gets very confusing, and in the end, what does it all mean in 30 knot
cross wind, sun in your eyes and thermals to boot???</FONT></SPAN></DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS"
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS"
color=#0000ff>Trim as good as possible, burn heaps of fuel ( or charge them
packs) and learn to fly the PIGS!!</FONT></SPAN></DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS"
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=488440723-03092006><FONT face="Comic Sans MS"
color=#0000ff>Ofcourse good design helps.</FONT></SPAN></DIV>
<DIV><FONT face="Comic Sans MS" color=#0000ff></FONT> </DIV>
<DIV><FONT face="Comic Sans MS"><FONT color=#0000ff>T<SPAN
class=488440723-03092006>om</SPAN></FONT></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of </B>Dean
Pappas<BR><B>Sent:</B> Sunday, 3 September 2006 4:58 AM<BR><B>To:</B> NSRCA
Mailing List<BR><B>Subject:</B> RE: [NSRCA-discussion] Aero design
question<BR><BR></FONT></DIV>
<DIV>Hi Gang,</DIV>
<DIV><FONT size=2><FONT size=3>The excellent axial rolling charecteristic of
some designs is due to a lot more than where the inboard end of the ailerons
end. Nonetheless, all of my designs used ailerons that ended far from the
fuse! The only downside is that having a bit of aileron in front of the stab
offers a useful trimming tool: trailing the ailerons up or down will change
the effective stab incidence, and this was a powerful adjustment tool back
when we didn't have plug-in adjustable "everything".</FONT></FONT></DIV>
<DIV> </DIV>
<DIV>You note Akiba's well trimmed airplanes. There is some smart design going
on there!</DIV>
<DIV> </DIV>
<DIV>later,</DIV>
<DIV> Dean</DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>-----Original Message----- <BR><B>From:</B>
nsrca-discussion-bounces@lists.nsrca.org on behalf of John Ferrell
<BR><B>Sent:</B> Sat 9/2/2006 7:48 AM <BR><B>To:</B> NSRCA Mailing List
<BR><B>Cc:</B> <BR><B>Subject:</B> Re: [NSRCA-discussion] Aero design
question<BR><BR></DIV></FONT>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial size=2>I have spent a fair amount of time considering
this situation. I have concluded there is no reason to take the risk of
adding unnecessary turbulence to the empennage.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>In gentle maneuvering it probably has little
effect. In aggressive maneuvering (think snaps) it likely leads to
inconsistent behavior. Inboard ailerons may contribute additional available
force in 3D maneuvers (hanging on prop?). </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Other related considerations are aileron shape
and the hinging geometry. I also suspect fat fuselages reduce these effects
by dispersing the turbulence over a greater volume of air.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Just my two cents worth!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>John Ferrell W8CCW<BR>"My
Competition is not my enemy"<BR><A
href="http://DixieNC.US">http://DixieNC.US</A><BR></FONT></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"><B>From:</B> <A
title=pentagon.systems@bigpond.com
href="mailto:pentagon.systems@bigpond.com">Peter Pennisi</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> Friday, September 01, 2006 8:35
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion] Aero
design question</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">My current model
has ailerons which extend a fair way towards the fuselage (Comp-ARF
IMPACT) What effect does the turbulence coming off the aileron have on the
tail plane. I am currently building another IMPACT (IMHO flies extremely
well) which I am considering to reduce their size by cutting and fixing
the inboard part to the wing in an attempt to clean up the airflow over
the tail plane during rolling maneuvers . The model does roll well
but it could be better.</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Am I barking up
the wrong tree – any thoughts!</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Peter
</SPAN></FONT></P></DIV>
<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></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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