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Wow! Thanks David - I thought that I was the only one who believed that
this whole issue is really much simpler than we are making it out to
be. Every plane stalls differently due to wing loading, wing sweep,
cg, etc etc etc and therefore cannot be expected to look EXACTLY the
same as every other stall /snap / spin. We need to get away from
expecting these maneuvers to be cookie cutter maneuvers. <br>
<br>
Chris<br>
<br>
David Flynt wrote:<br>
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<div><font face="Arial" size="2">I have always judged snaps with a
simple rule -- if it is not a barrel role, and if the tail describes a
helix or cone, then the plane must be stalled, and therefore it is a
snap. I have never downgraded because the plane is set up with a lot
of aileron, so long as the tail wags, and so long as the nose and
tail describe opposing helixes. I don't see any reference to how fast
or slow the plane rolls with regard to downgrades. To me, a pilot is
free (and smart) to set up their plane such that it loses as little
heading as possible in a snap. </font></div>
<div> </div>
<div><font face="Arial" size="2">Am I completely mistaken on this? A
barrel roll is easy to detect. An axial roll is easy to detect. If it
is not a barrel roll, and not an axial roll, then it must be a valid
snap, even if it is subtle and the plane is not buried deeply in a
snap. At least that is my current understanding.</font></div>
<div> </div>
<div><font face="Arial" size="2">I'll admit that I don't really
understand the degree at which the plane must "break" in the direction
of snap. Who came up with that idea? What really does that mean, and
how do you measure it? "the nose of the fuselage should show a
definite break in the direction of the snap". Ok, what is definite?
At what point exactly must the aircraft become stalled? It takes time
for the control surfaces to deflect. It does not happen
instantaneously. </font></div>
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<div><font face="Arial" size="2">I think the maneuver is over
described and over analyzed. Its a "rapid autorotation in the pitch,
yaw, and roll axes of flight in a stalled wing attitude." That should
be good enough to judge it. If not, maybe use my definition of judging
it. </font><font face="Arial" size="2">Until I know what a "definite
break" is, that's what I am going to do.</font></div>
<div> </div>
<div><font face="Arial" size="2">David </font></div>
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