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<p class=MsoNormal><span class=EmailStyle21><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Earl, I am
following you so far. Your comment regarding CG was interesting. I moved the CG
back on my primary airplane to soften the nose drop when pushing to horizontal
and adjusted things to get an acceptable avalanche. In test flying my back-up
airplane prior to selling it I found the avalanche snap to actually be better,
at least in dense air. Interesting!<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle21><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>The
question I have is, what effect dose leading edge sweep have on the wing stall characteristics?
My current design has 12.5 degrees and is 22.1-oz/sq ft. In preparing design
changes for a new airplane I am planning 10.5 degree and 22.8 wing loading.
Would it be beneficial to reduce the leading edge sweep more?<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle21><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Thanks <o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle21><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Jim Hiller<o:p></o:p></span></font></span></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;color:black'>-----Original
Message-----<br>
<b><span style='font-weight:bold'>From:</span></b>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<b><span style='font-weight:
bold'>On Behalf Of </span></b>Earl Haury<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 22, 2007
5:19 AM<br>
<b><span style='font-weight:bold'>To:</span></b> NSRCA Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Judging-snap & spin</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face=Arial><span style='font-size:12.0pt;font-family:Arial;color:black'>The
term "wing stalls" may be a bit confusing when related to snaps
(especially those who fly barrel rolls) and spins. Generally "wing
stall" is considered to be total loss of lift created by high AOA and/or
slow speed. Terms like "asymmetrical stall" or "partial air flow
separation" may be more descriptive for spins and snaps. The trick is to
increase the wing AOA to a point just before stall, then change the forward
speed of each wing panel with yaw. The decrease in speed of the rearward traveling
panel completes the imminent flow separation (set up by being near stall) while
the forward traveling panel maintains lift. The effect is near that of a wing
panel falling off one side with the remaining panel providing the lift for
rapid rotation.</span></font><font color=black><span style='color:black;
mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face=Arial><span style='font-size:12.0pt;font-family:Arial;color:black'>For spins
the airplane is generally smoothly slowed to a near stall while increasing
(pitch) AOA , rudder induced yaw then completes the process
by "stalling" one wing. As the total lift is insufficient to
support the airplane, the airplane falls vertically while
the asymmetric lift creates the rotation. As the entry pitch
increase is gradual, the AOA will be high as the yaw application point is
reached. </span></font><font color=black><span style='color:black;mso-color-alt:
windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face=Arial><span style='font-size:12.0pt;font-family:Arial;color:black'>Snaps
are flown at relatively high speed. The goal again is to get the air flow
separation on one wing and not the other. The trick is to apply a pitch
increase very rapidly so as to move the wing quicker than the air can follow,
producing near or actual flow separation. (The rapid pitch change mitigates the
need for a large pitch AOA change). While the airplane is in this state,
rapidly following with rudder induced yaw produces the asymmetric lift and the
"autorotation". Note that the term "autorotation" generally
relates to aircraft rotation without input from the roll controls (ailerons).
However, the ailerons play a legitimate roll in true snap rolls. Primarily by
overcoming aircraft inertial resistance to starting and stopping rotation -
makes for more predictable starts / stops. A secondary benefit is that the
aileron on the high lift wing side is acting as a flap while the aileron on the
low lift wing side is acting as a spoiler. The latter effect may also play a
part in quickly exiting a snap as neutralizing the "flap/spoiler"
configuration can allow the wing to return to symmetrical lift quickly.</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face=Arial><span style='font-size:12.0pt;font-family:Arial;color:black'>Some things
to consider when setting up snap control parameters. The ability to rapidly
pitch the wing to the necessary AOA (varies with designs) requires fast
elevator servo(s), enough travel, and a quick thumb. Also, upon establishing
the snap, most designs will benefit from the relaxing of some percentage
of elevator input so as to not over pitch (bury) the snap and allow for rapid
recovery. The rudder input needs to be rapid and slightly delayed from the
elevator. A fast powerful servo (remember - airspeed is high making
rudder load high) is needed to yank the wing into the yaw attitude to create
the asymmetrical lift. Also note that the rudder travel will be the controlling
factor (given equal pitch) for snap rotation rate. Ailerons are the least
important control - enough (applied at the same time as rudder) to overcome
inertia is all that's needed. If you find aileron travel is controlling snap
rotation rate - the airplane probably isn't doing a snap roll, but rather a
wobbly aileron roll. Different CG locations will also play a role, some believe
the more rearward the better - but that really just reduces demand for servo
power / speed, while making exits difficult. </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face=Arial><span style='font-size:12.0pt;font-family:Arial;color:black'>Different
designs will snap differently for a given set of control parameters. It's
a challenge to "get it right" for snaps, but no more so than trimming
for a straight knife edge of vertical line. Take the time to trim the airplane
for snaps and you will enjoy no longer being "a part of the problem".
</span></font><font color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face=Arial><span style='font-size:12.0pt;font-family:Arial;color:black'>Earl</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<div style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:40.2pt;border:none;mso-border-left-alt:solid black 1.5pt;
padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>-----
Original Message ----- </span></font><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:40.2pt;background:#E4E4E4;border:none;mso-border-left-alt:solid black 1.5pt;
padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black;
font-weight:bold'>
<div style='font-color:black'>From:</span></font></b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> <a
href="mailto:ed_alt@hotmail.com" title="ed_alt@hotmail.com">Ed Alt</a> </span></font></div>
<font size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:
Arial;color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:40.2pt;border:none;mso-border-left-alt:solid black 1.5pt;
padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black;
font-weight:bold'>To:</span></font></b><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'> <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="nsrca-discussion@lists.nsrca.org">'NSRCA Mailing List'</a> </span></font><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:40.2pt;border:none;mso-border-left-alt:solid black 1.5pt;
padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black;
font-weight:bold'>Sent:</span></font></b><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'> Monday, October 22,
2007 12:59 AM</span></font><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:40.2pt;border:none;mso-border-left-alt:solid black 1.5pt;
padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black;
font-weight:bold'>Subject:</span></font></b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> Re:
[NSRCA-discussion] Judging-snap & spin</span></font><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:40.2pt;border:none;mso-border-left-alt:solid black 1.5pt;
padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'><![if !supportEmptyParas]> <![endif]></span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:40.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>The only problem with simultaneous initiation in all 3 axis is that
it is a guarantee that the beginning of the roll was not in a stalled
condition, i.e. not an autorotation. Therefore, that part of the roll
isn’t a snap and should be downgraded using 1 point per degree criteria.
Then the trick becomes determining just when the autorotation actually did
commence while the airplane is already rolling quickly, primarily due to
aileron and to a degree rudder. Until the wing stalls, it’s not a
snap. The main thing that you can hope for in a real snap roll that
relates to precision is that you get the correct number of degrees of roll
caused by autorotation in a stalled condition. </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:40.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:40.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Ed</span></font><font color=black><span style='color:black;
mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:40.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:40.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
</div>
<div style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt'>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:black'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Nat Penton<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 22, 2007
12:34 AM<br>
<b><span style='font-weight:bold'>To:</span></b> NSRCA Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Judging-snap & spin</span></font><font color=black><span style='color:black;
mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>The problem we have is not understanding snap dynamics.</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>Rudder, elevator and aileron are EQUALLY important to the
snap.</span></font><font color=black><span style='color:black;mso-color-alt:
windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>Visionalizing the S & L up/rt snap we see that aileron makes a
critical contribution to reaching the lead wing stall AOA ( due to rud ).</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:76.2pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>To be a thing of beauty ( ahem, 10 ) the break will
need to be initiated simaltaneously on all
axis. Nat</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
</div>
<div style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt'>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>----- Original Message ----- </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;background:#E4E4E4;border:none;
mso-border-left-alt:solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;font-weight:bold'>
<div style='font-color:black'>From:</span></font></b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> <a
href="mailto:ejhaury@comcast.net" title="ejhaury@comcast.net">Earl Haury</a> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;font-weight:bold'>To:</span></font></b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</a> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;font-weight:bold'>Sent:</span></font></b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>
Sunday, October 21, 2007 2:54 PM</span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;font-weight:bold'>Subject:</span></font></b><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'> Re: [NSRCA-discussion] Judging-snap & spin</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face=Arial><span style='font-size:12.0pt;font-family:Arial;
color:black'>I also agree with the comments of Jon and John. Chris's
observations are also valid and I'd like to expand on his thoughts a bit. </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face=Arial><span style='font-size:12.0pt;font-family:Arial;
color:black'>Remember, we use contestant judging - so it's a pretty good bet
that if the judge isn't capable of judging a snap correctly, it's also unlikely
that person can perform one correctly as a pilot. I'll bet that often the
judge "requiring" a huge "break" is the same person flying
them with a snap switch, or dual rates, set to maximum travels for all axis.
They just chop power and pull the switch or stuff the sticks into the corner.
Generally this results in a three axis track departure of some 15 to 30 degrees
(as a barrel roll), now interpreted as a "break", before flow
separation occurs on the lagging wing and a snap actually occurs. These
excessive control inputs also bury the snap and make it totally ugly.
However - these folks are doing what they think is required for a snap, so it
must be right. (A lot of these never snap and are total barrel rolls.)</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face=Arial><span style='font-size:12.0pt;font-family:Arial;
color:black'>So - the education process is better focused on the pilot than the
judge, and both will benefit (as will we all). As John points out - each full
scale will have different snap characteristics. Same with pattern airplanes,
and each situation may vary (45 deg lines, vertical up -down, level, avalanche,
etc.). Snaps take a good set-up and skill to fly well, as well as being a fun
part of pattern. Flyers who take the time to determine just what set-up up and
technique their airplane needs to snap well shouldn't be penalized by those
(pilot judges) who don't. However, this whole issue might slip away if
those who've figured out how to do decent snaps would take the time to share
with those that haven't. </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face=Arial><span style='font-size:12.0pt;font-family:Arial;
color:black'>Earl</span></font><font color=black><span style='color:black;
mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:79.95pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
</div>
<div style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt'>
<p class=MsoNormal style='margin-left:83.7pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>----- Original Message ----- </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:83.7pt;background:#E4E4E4;border:none;
mso-border-left-alt:solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;font-weight:bold'>
<div style='font-color:black'>From:</span></font></b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> <a
href="mailto:cjm767driver@hotmail.com" title="cjm767driver@hotmail.com">chris
moon</a> </span></font><font color=black><span style='color:black;mso-color-alt:
windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-left:83.7pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;font-weight:bold'>To:</span></font></b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:83.7pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;font-weight:bold'>Sent:</span></font></b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>
Sunday, October 21, 2007 2:01 PM</span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:83.7pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black;font-weight:bold'>Subject:</span></font></b><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'> Re: [NSRCA-discussion] Judging-snap & spin</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:83.7pt;border:none;mso-border-left-alt:
solid black 1.5pt;padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
</div>
<div style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt'>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:407.7pt;border:none;mso-border-left-alt:solid black 1.5pt;
padding:0in;mso-padding-alt:0in 0in 0in 4.0pt'><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;color:black'>Jon and
John are correct in their comments. <br>
To add something - I think the problem is that many of us "cater" to
the <br>
judges who do not judge these maneuvers correctly. There is no <br>
requirement to over exaggerate the break in order to do the maneuver, <br>
however many do just that as a defensive tactic against the judge who <br>
refuses to judge correctly. The problem is the JUDGE - not the pilot. <br>
I don't advocate changing the schedules or K factors as a work around <br>
for poorly informed judges. We are much too politically correct and <br>
accept the zeros from them if we don't do it "their" way. If you <br>
compete regularly, you know who they are and cater your maneuver to <br>
accommodate their lack of ability in the chair. Sorry for the rant, but <br>
we are talking about fixing things the wrong way for the wrong reasons. <br>
<br>
Chris <br>
<br>
<br>
John Ford wrote: <br>
> Jon, <br>
> Hear, hear. <br>
> Couldn't have said it better! <br>
> I also share the opinion that in the case of the snap (or the spin <br>
> entry for that matter), our judging standards don't judge actual <br>
> flight characteristics of the particular plane, and we are asking <br>
> pilots to exagerate the break because that is what we agreed we wanted <br>
> to see all the time, not because every plane should show it naturally. <br>
> Maybe we are sitting on this bed of nails because for many people, the <br>
> mystery and controversy of the break is more attractive than <br>
> aerodynamic reality? <br>
> I've done lots of snaps in full-sized planes and there are as many <br>
> break styles as there are airplane designs. Some older/larger planes <br>
> require that you slow up and reef back almost to the buffet before <br>
> mashing the rudder, others are so touchy that a modest tap on the <br>
> rudder with only a hint of pitchup will send the beast thru 150 <br>
> degrees of autorotation before you can think about it. In both cases, <br>
> believe me, it was a true snap roll, but in the first case, you may <br>
> have seen some break, but in the latter, it would have looked like <br>
> everything happened at the same time around all 3 axes. I'm sitting in <br>
> the thing, and I can't tell! <br>
> Essentially the same comments for spin entry, in agreement with Jon's <br>
> comments. <br>
> I'll judge by the rules of the CD, but I do it with a bit of a <br>
> shoulder shrug, I suppose. <br>
> John <br>
> <br>
> */JonLowe@aol.com/* wrote: <br>
> <br>
> The age old problem of what a "break" is in a snap was solved at
<br>
> the Don Lowe Masters a couple of years ago. They defined it as a <br>
> "simultaneous departure in all three axis". There you saw
graceful <br>
> snap entries, clearly defineable as a snap. At the IMAC Tuscon <br>
> shootout, they had had the pitch departure requirement, and most <br>
> were pitching what looked like 45 degrees (was probably 25 <br>
> degrees), before they entered the snap. Break, pause, enter snap. <br>
> Ugly as hell. At a pattern judging seminar I went to this year, we <br>
> sat around for half an our trying to decide what a "pitch break"
<br>
> was. We finally decided that if you saw anything at all, it was <br>
> ok. But beware of IMAC judges crossing over, unless they have been <br>
> retrained. I got some 5's this year this year, because they didn't <br>
> see a large break. <br>
> As regards spin entries, there are too many spin entry nazis IMHO. <br>
> The rule book clearly defines downgrades for entries. In my book, <br>
> if they don't break any of those rules, (wing coming over before <br>
> the nose passes thru horizontal, not stalled, weathervaning, <br>
> etc.), I don't downgrade for the entry. Too many people want to <br>
> add their own definition to the rules about how an entry
"should" <br>
> look, and tell you they downgraded or zeroed you. When you ask <br>
> them what specific rule you violated, they say it "didn't look <br>
> right". Some of these same people will coach you to "cheat"
at the <br>
> entry to get a pretty one, dumping up elevator to get the nose to <br>
> fall thru, which really breaks the stall. Unfortunately, all <br>
> airplanes do not enter the same way, and some entries are not <br>
> pretty, but they don't break the rules. Maybe, as well as teaching <br>
> what isn't correct, we ought to teach what ISN'T downgradeable in <br>
> some of these manuevers. <br>
> Jon <br>
> In a message dated 10/21/2007 8:50:52 AM Central Daylight Time, <br>
> patterndude@tx.rr.com writes: <br>
> <br>
> Ron, <br>
> Your idea caused me to stop and think. I'm wondering if it <br>
> would really help, however. If a pilot "in the hunt" screws <br>
> the landing (K=1) he's now "out of the hunt" on that round. <br>
> Scores are often very compressed at local contests so even if <br>
> we reduce the KF, a bad score on any manuver is usually enough <br>
> to do mortal damage. <br>
> --Lance <br>
> <br>
> ----- Original Message ----- <br>
> *From:* Ron Lockhart <br>
<MAILTO:RONLOCK_X0040_COMCAST.NET>> *To:* NSRCA Mailing List <br>
> <br>
<MAILTO:NSRCA-DISCUSSION_X0040_LISTS.NSRCA.ORG>> *Sent:* Saturday, October
20, 2007 11:34 AM <br>
> *Subject:* Re: [NSRCA-discussion] Judging-snap & spin <br>
> <br>
> Eliminating is one solution - a price that comes with that <br>
> solution is lack of practice doing and judging snaps- <br>
> which is desirable for some in AMA classes, and for sure <br>
> for those looking ahead to F3A. <br>
> An in between thought - reduce the K factor considerable <br>
> for snap and spin maneuvers. <br>
> That leaves them in the schedules, provides flying and <br>
> judging practice on them, but reduces the <br>
> impact of the imperfect judging of them on round scores. <br>
> Ron Lockhart <br>
> <br>
> ----- Original Message ----- <br>
> *From:* BUDDYonRC@aol.com <br>
<MAILTO:BUDDYONRC_X0040_AOL.COM>> *To:* nsrca-discussion@lists.nsrca.org <br>
> <br>
<MAILTO:NSRCA-DISCUSSION_X0040_LISTS.NSRCA.ORG>> *Sent:* Saturday, October
20, 2007 11:44 AM <br>
> *Subject:* Re: [NSRCA-discussion] Judging <br>
> <br>
> My cents worth on the subject. <br>
> Snaps and Spin entry seem to cause much of the problem. <br>
> Why do we continue to repeat trying to solve a problem <br>
> that most agree is controversial at best and <br>
> impossible to judge consistently on an equal basis? <br>
> Seems that the best solution is to eliminate these <br>
> from the schedules and pick maneuvers that more suit <br>
> Precision Aerobatics and their ability to be judged <br>
> correctly by everyone not just those who have advanced <br>
> to the top of the super judge platform. <br>
> <br>
> Buddy <br>
> <br>
> Jon Lowe <br>
> <br>
> <br>
> <br>
> ------------------------------------------------------------------------ <br>
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> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
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