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<DIV><STRONG><FONT face="MS Sans Serif" color=#0000ff>Great points.!!
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<DIV><STRONG><FONT face="MS Sans Serif" color=#0000ff>
Del</FONT></STRONG></DIV>
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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=d.pappas@kodeos.com href="mailto:d.pappas@kodeos.com">Dean Pappas</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> Tuesday, June 24, 2003 12:38
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Snaps/Spins</DIV>
<DIV><BR></DIV>Hi Ron,<BR>Your point is well taken, but the simple reality is
that lots of fliers are pushing the envelope of zero-ing the snap, just to be
able to do something more consistent. I forget who wrote earlier to say that
(almost quote) you can't go wrong watching the best fliers at the NATs as to
what is and isn't a snap, but I'm afraid that man was dead wrong (my apologies
for forgetting your name, again). Many of the best fliers are the worst
perpetrators. Some even vary how hard they push that envelope, based upon who
is in the judges' chairs. They are good, after all! Certain of us (ahem) have
a reputation for being intolerant of snaps that break first in yaw, or unstall
a full 90 degrees before rotation stops, or other
transgressions.<BR>Regards,<BR>Dean Pappas<BR><BR>-----Original
Message-----<BR>From: Ron Van Putte [mailto:vanputte@nuc.net]<BR>Sent:
Tuesday, June 24, 2003 3:19 PM<BR>To: <A
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>Subject:
Snaps/Spins<BR><BR><BR>You can analyze the skin off maneuvers like snaps and
spins and we've <BR>been doing a lot of that. However, one thing I
haven't heard in the <BR>latest series of discussions is that, like other
maneuvers, the airplane <BR>characteristics do not instantly develop into the
spin/snap rates we see <BR>in mid-maneuver. Newton has something to say
about that. Forces and <BR>moments produce linear and angular
accelerations, which are opposed <BR>countering forces and moments as the
rates build, until the steady state <BR>(constant rate) condition is
achieved. It takes time to do that. <BR>Similarly, it takes time to stop
a snap/spin. So, what you should see <BR>in snaps/spins is an increase
roll/yaw rate, a constant roll/yaw rate <BR>and a decrease in yaw/roll
rate. What I'm afraid that some judges are <BR>seeing the
acceleration and deceleration in roll/yaw rates at the <BR>beginning and end
of a snap/spin as downgradable, when the pilot can't <BR>do anything
about it - it's physics. <BR><BR>Ron Van
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