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<DIV><FONT face=Arial>The stall turn descriptions seem to be consistent
throughout, with no exceptions. It is, of course, apparent
that the actual drift direction of the airplane, when it is in a zero airspeed,
or near zero airspeed, condition, cannot be controlled. In that "zero"
condition, control surfaces have little (or, at best, highly diminshed)
effect on airplane attitude. In IAC competition, effects caused by wind
drift are to be ignored, because the pilot, not standing on the ground, has
little idea of the direction the wind is taking his airplane. In this
case, we have the advantage. </FONT></DIV>
<DIV><FONT face=Arial>Is this discussion going somewhere? Or just
confusing us?</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=jlachow@hotmail.com href="mailto:jlachow@hotmail.com">Joe
Lachowski</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 Discussion List</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, October 07, 2009 1:52
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] basic
judging question</DIV>
<DIV><BR></DIV>The description of stall turns does refer to Figure-M's and the
like. <BR> <BR> <BR>
<P style="MARGIN: 0in 0in 0pt" class=Default><FONT size=3><FONT
face="Times New Roman"><B><SPAN style="COLOR: windowtext">Stall Turns:
</SPAN></B><SPAN style="COLOR: windowtext">Stall turns consist of lines and
partial loops as well as stall turns. The following criteria apply to all
maneuvers containing stall turns <U><EM><FONT color=#ff0000>(e.g., Figure M,
Stall Turn with Half Rolls, etc.).
<o:p></o:p></FONT></EM></U></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=Default><FONT size=3><FONT
face="Times New Roman"><B><SPAN style="COLOR: windowtext">1. </SPAN></B><SPAN
style="COLOR: windowtext">Lines must have exactly vertical and horizontal
flight paths. <o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=Default><FONT size=3><FONT
face="Times New Roman"><B><SPAN style="COLOR: windowtext">2. </SPAN></B><SPAN
style="COLOR: windowtext">Entry and exit must consist of partial loops with
equal radii. <o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=Default><FONT size=3><FONT
face="Times New Roman"><B><SPAN style="COLOR: windowtext">3. </SPAN></B><SPAN
style="COLOR: windowtext">Length of the vertical line is not a criterion.
<o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=Default><FONT size=3><FONT
face="Times New Roman"><B><SPAN style="COLOR: windowtext">4. </SPAN></B><SPAN
style="COLOR: windowtext">All rolls must be placed in the center of the lines.
<o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=Default><FONT size=3><FONT
face="Times New Roman"><B><SPAN style="COLOR: windowtext">5. </SPAN></B><SPAN
style="COLOR: windowtext">Maximum pivot radius is one-half (1/2) wingspan. A
pivot radius of more than one and one- half (1-1/2) wingspan should be
considered a major defect and be downgraded by at least two (2) points.
<o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=Default><FONT size=3><FONT
face="Times New Roman"><B><SPAN style="COLOR: windowtext">6. </SPAN></B><SPAN
style="COLOR: windowtext">If the model shows a pendulum movement after the
pivot, the maneuver is downgraded by one (1) point.
<o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=Default><SPAN
style="COLOR: windowtext"><o:p><FONT size=3
face="Times New Roman"> </FONT></o:p></SPAN><BR> </P>
<HR id=stopSpelling>
Date: Wed, 7 Oct 2009 10:12:41 -0700<BR>From: bob@toprudder.com<BR>To:
nsrca-discussion@lists.nsrca.org<BR>Subject: Re: [NSRCA-discussion] basic
judging question<BR><BR>
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<DIV>Jim,</DIV>
<DIV> </DIV>
<DIV>What you said is exactly how I remember the judging discussion
presented at the Youth Masters re: IMAC stall turns. And I remember
thinking to myself that this is not the way we did it in pattern in the
'90s. Oh, well, I did not want this to turn into a pattern vs IMAC
discussion again. :-\</DIV>
<DIV> </DIV>
<DIV>Getting back to my original question, I think the stall turn should
be wind corrected as much as possible through the stall turn itself.
However, that is not how the maneuver description is written for the
Figure M or the Double Stall Turn. The language used for the regular
Stall Turn w/ or w/o Rolls should be duplicated, IMHO.</DIV>
<DIV> </DIV>
<DIV>Bob R.</DIV>
<DIV><BR><BR>--- On <B>Wed, 10/7/09, Woodward, Jim (US SSA)
<I><jim.woodward@baesystems.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From:
Woodward, Jim (US SSA) <jim.woodward@baesystems.com><BR>Subject:
Re: [NSRCA-discussion] basic judging question<BR>To: "General pattern
discussion" <nsrca-discussion@lists.nsrca.org><BR>Date:
Wednesday, October 7, 2009, 11:02 AM<BR><BR>
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<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Bill
– I can see where the confusion is - as I perfectly relayed the
information as taught in the SE judging seminar and confirmed in the
practical judging practice held on Sundays. The IMAC judging
committee interprets the definition to mean that the attitude
(fuselage) must be in the vertical plane during the rotation.
They further back this up by stating that if the plane were to be in
the “wind-corrected” attitude (not perfectly vertical) during the
rotation, that it would be subject to the 0.5 pt per 5 degree
rule. I’ve been in the room 3 times when Wayne M. has explained
this and answered many questions from it.</SPAN></P></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></SPAN> </P></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Lots
of discussion took place over this in the judging seminar.
Basically they are teaching that for “yaw” you can remain wind
corrected, but for the pitch axis, you must be in the vertical
plane. Sorry if this seems to contradict the rule, but this is
what is being taught and practiced in the South East. </SPAN>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></SPAN>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">I
think it looks funny, and I would prefer for the interpretation to
allow “wind-correction” for any time, but I must fly what they teach
as the scoring criteria SE. On the other hand, I would love to
know if this has changed as well.</SPAN>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Thanks,</SPAN>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Jim</SPAN>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></SPAN>
<DIV></DIV>
<DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></SPAN> </P></DIV>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></SPAN>
<DIV></DIV>
<DIV>
<DIV
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<P class=ecxMsoNormal><B><SPAN
style="FONT-FAMILY: 'Tahoma', 'sans-serif'; COLOR: windowtext; FONT-SIZE: 10pt">From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Tahoma', 'sans-serif'; COLOR: windowtext; FONT-SIZE: 10pt">
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <B>On Behalf Of
</B>Bill's Email<BR><B>Sent:</B> Wednesday, October 07, 2009 9:48
AM<BR><B>To:</B> General pattern discussion<BR><B>Subject:</B> Re:
[NSRCA-discussion] basic judging question</SPAN></P></DIV></DIV>
<DIV></DIV>
<P class=ecxMsoNormal>
<DIV></DIV>
<P class=ecxMsoNormal>Woodward, Jim (US SSA) wrote:
<DIV></DIV>
<P class=ecxMsoNormal>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></SPAN>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">However,
this dovetails into the recent IMAC & Pattern comparison
threads. In IMAC, the plane is supposed to be brought into the
“vertical plane” prior to the stall-turn(pivot) taking place.
This is mostly evident if you are flying in a strong headwind where
you are wind correcting the vertical line. Just prior to the
stall turn, the pilot hast to pitch the plane into the vertical plane,
then yaw around the pivot, then return to the wind corrected down
line.</SPAN>
<DIV></DIV>
<P class=ecxMsoNormal><SPAN
style="FONT-FAMILY: 'Calibri', 'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></SPAN>
<DIV></DIV>
<P style="MARGIN-BOTTOM: 12pt" class=ecxMsoNormal> Not sure where
you got this about IMAC, but it is incorrect. This may be the cause of
your confusion (from Rule 8.5):<BR><BR>The wings must remain in the
vertical geometric plane throughout the turnaround, and the aircraft‘s
attitude before and after the turnaround must be absolutely vertical
(unless wind correction is required), with no extraneous tail
movement. There must be no rotation around the pitch or roll axis. If
there is movement around any axis other than the yaw axis, often
referred as "torquing" (Fig. 25), there is a deduction of 0.5 points
per 5 degrees of axis.<BR><BR>At no time in IMAC is the actual
attitude of the plane judged, it is ALWAYS the track of the
theoretical center of mass. You are not required to alter the pitch of
the plane at the point if the rotation starts if the pitch attitude in
not vertical due to wind correction.<BR><BR><BR>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV><BR>-----Inline Attachment Follows-----<BR><BR>
<DIV
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