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<DIV><SPAN class=610271002-05092006><FONT face=Arial color=#0000ff size=2>Now
that sounds like the way to go! Except I think you actually need 3 servos
to do it right. I'm setting up the mix on my 12z now...</FONT></SPAN></DIV>
<DIV><SPAN class=610271002-05092006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=610271002-05092006><FONT face=Arial color=#0000ff size=2>
<P><FONT size=2>John Pavlick<BR><A href="http://www.idseng.com/"
target=_blank>http://www.idseng.com</A><BR> </FONT>
</P></FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; 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>george w.
kennie<BR><B>Sent:</B> Monday, September 04, 2006 9:55 PM<BR><B>To:</B> NSRCA
Mailing List<BR><B>Subject:</B> Re: [NSRCA-discussion] Aero design
question<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>For cryin' out loud, if your going to go to all
that trouble, use two servos per panel at the opposing extremes of each
flexible aileron driving in opposite directions. Now that's HELICAL
!!!!!!!!!!!!!!! What the heck have you guys been smokin'
?????????????? And I thought I was extreme. Are we in the "Twilight
Zone" here? BGw?</FONT></DIV>
<DIV><FONT face=Arial size=2>G.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></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; font-color: black"><B>From:</B>
<A title=patterndude@comcast.net href="mailto:patterndude@comcast.net">Lance
Van Nostrand</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, September 04, 2006 9:05
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Aero
design question</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Helical pitch ailerons! Nat, this is
brilliant. Instead of making stiff ailerons, make them to flex.
glue the tip to the wing tip and drive the root end. Ailerons would
work just like a 74x6 propeller.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>--Lance</FONT></DIV>
<DIV> </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=natpenton@centurytel.net
href="mailto:natpenton@centurytel.net">Nat Penton</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> Sunday, September 03, 2006 9:31
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Aero
design question</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Hey Tom</FONT></DIV>
<DIV><FONT face=Arial size=2>I'm not providing solutions - just
putt'in more wood on the fire. In steady state roll the least drag
position of the ailerons would be constant AOA root to tip. This would
call for the percentage of chord to progress linearly so that it would be
double at the tip vs the mid span position - no different than helical
pitch. </FONT><FONT face=Arial size=2>A ( severe ?) negative would occur,
though, when the ailerons are initiated, potentially causing a tip
stall.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Martin Simmons provides a curve showing Cl vs
% of chord for the aileron. Going over 20% doesen't get you much for
the dollar - just much more servo wear and tear ( especially with the 160
<G> ).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>IMO it is not worth the extra work to stop
the ailerons short of the
tip.
Nat</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; font-color: black"><B>From:</B>
<A title=Tom.Koenig@actewagl.com.au
href="mailto:Tom.Koenig@actewagl.com.au">Koenig, Tom</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> Sunday, September 03, 2006
6:46 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion]
Aero design question</DIV>
<DIV><BR></DIV>
<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>
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