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<DIV><FONT face=Arial size=2>Darn tricky keyboards! Seems as though most figured
it out though.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Earl</FONT></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=gfowler@raytheon.com href="mailto:gfowler@raytheon.com">Gray E
Fowler</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> Thursday, January 27, 2005 5:17
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Snao G's</DIV>
<DIV><BR></DIV><BR><FONT face=sans-serif size=2>Technically isn't a Rev
avalanche snap just a negative level snap at the speed at which you
entered?<BR>Or is it a SNAO?<BR><BR><BR>Gray Fowler<BR>Principal Chemical
Engineer<BR>Composites Engineering</FONT> <BR><BR><BR>
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<TD><FONT face=sans-serif size=1><B>Ed Deaver <<A
href="mailto:divesplat@yahoo.com">divesplat@yahoo.com</A>></B></FONT>
<BR><FONT face=sans-serif size=1>Sent by: <A
href="mailto:discussion-request@nsrca.org">discussion-request@nsrca.org</A></FONT>
<P><FONT face=sans-serif size=1>01/27/2005 05:07 PM</FONT> <BR><FONT
face=sans-serif size=1>Please respond to discussion</FONT> <BR></P>
<TD><FONT face=Arial size=1> </FONT><BR><FONT
face=sans-serif size=1> To:
discussion@nsrca.org</FONT> <BR><FONT face=sans-serif
size=1> cc:
</FONT> <BR><FONT face=sans-serif size=1>
Subject: Re: Snao
G's</FONT></TR></TBODY></TABLE><BR><BR><BR><FONT size=3>So, if I am
interpreting these numbers(realize only one day and flight) correctly.
Beings the straight and level pos snap at 100mph(not unusual speed) was
-13G's and the Rev avalance at approximately 95mph was -13G's, then the forces
are about the same. </FONT> <BR><FONT size=3> </FONT> <BR><FONT
size=3>So, if we can slow the rev avalanche down to 70mph then the G's would
only be -7. </FONT> <BR><FONT size=3> </FONT> <BR><FONT size=3>This
seems to go along with previous arguments that speed is the key.</FONT>
<BR><FONT size=3> </FONT> <BR><FONT size=3>My question is, if the G's on
flat and level snaps are approximately the same, with approx equal speeds, as
the rev snap, then why hasn't FAI pilots been breaking planes with the
1.5snapopp 4/8???? </FONT> <BR><FONT size=3> </FONT> <BR><FONT
size=3>Before anyone says it, I have seen many of these 1.5 snaps flown with
some speed, so they weren't just puttputt into it.</FONT> <BR><FONT
size=3> </FONT> <BR><FONT size=3>Thanx Earl. Interesting
stuff</FONT> <BR><FONT size=3> </FONT> <BR><FONT size=3>ed</FONT>
<BR><FONT size=3><BR><B><I><BR>Earl Haury
<ehaury@houston.rr.com></I></B> wrote:</FONT> <BR><FONT face=Arial
size=2>FWIW, I took a quick look at some snap G's yesterday. Equipment was a
Quique YAK (140 size) fitted with an Eagle Tree Systems datalogger with G
sensor. I only gathered data from one flight - so take that into
consideration.</FONT> <BR><FONT size=3> </FONT> <BR><FONT face=Arial
size=2>Flat and level pos snaps @ (nominally) 100mph = 13G, dropping the speed
to 70mph = 7G. (A normal pull to vertical @ 100mph = 7G.)</FONT> <BR><FONT
size=3> </FONT> <BR><FONT face=Arial size=2>An Avalanche with a neg snap
at the top measured -5G @ 50mph.</FONT> <BR><FONT size=3> </FONT>
<BR><FONT face=Arial size=2>A Rev Avalanche with a pos snap at the bottom
measured 13G @ 95mph. (Masters maneuver - intentionally flown fast.)</FONT>
<BR><FONT size=3> </FONT> <BR><FONT face=Arial size=2>An Avalanche from
the top (push - F05) with a neg snap and a half at the bottom measured -14G @
90mph. </FONT><BR><FONT size=3> </FONT> <BR><FONT face=Arial size=2>(I
normally measure around 5G on upline and downline snaps with my
Partner.)</FONT> <BR><FONT size=3> </FONT> <BR><FONT face=Arial
size=2>All snaps were executed with rapid / high degree elevator lead and %
reduction of elevator during rotation.</FONT> <BR><FONT size=3> </FONT>
<BR><FONT face=Arial size=2>I may look at this further as the mood strikes. As
expected, controlling speed into snaps is easier on your airplane. None of the
observed loads (in my opinion) should damage a well constructed aerobatic
model (wouldn't want to ride in it though).</FONT> <BR><FONT
size=3> </FONT> <BR><FONT face=Arial size=2>Earl</FONT>
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