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<DIV>Well, yes that's true when one is flying IN any specific maneuver such
as hover or high alpha circles, for example. BUT, and this is a very big BUT,
initiation of some 3D maneuvers is quite violent. </DIV>
<DIV> </DIV>
<DIV>Consider a WALL the instant elevator is applied, PARACHUTE under same
conditions, or BLENDER when controls are taken to the corners. </DIV>
<DIV> </DIV>
<DIV>I would bet dollars to donuts that a full speed WALL is the most violent of
these, and it wouldn't surprise me if Earl found somewhere around 25 to 30G
loads for that maneuver. Rest assured that IF you pattern model survives the
WALL, (excuse the intended pun) it will survive the rev Ava snap.</DIV>
<DIV> </DIV>
<DIV>MattK</DIV>
<DIV> </DIV>
<DIV><In a message dated 1/28/2005 4:17:12 PM Eastern Standard Time,
mrandmrst@comcast.net writes:</DIV>
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<DIV>Matt,</DIV>
<DIV>I could be wrong, but isn't 3D, by definition, done in a constant state
of stall? Wouldn't that eliminate a lot of the high G's in the
maneuvers? I wouldn't think the airframe would be in as stressed state,
when the flying surface is depending on prop wash, not air speed, to do it's
thing.</DIV>
<DIV> </DIV>
<DIV>Ken</DIV>
<BLOCKQUOTE dir=ltr
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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=mailto:Rcmaster199@aol.com
href="mailto:Rcmaster199@aol.com">Rcmaster199@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, January 28, 2005 1:46
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Snao G's</DIV>
<DIV><BR></DIV><FONT face=Arial color=#000000 size=2>
<DIV>
<DIV>If this accelerometer is finding 13 G loads generated by a Pattern
model snap, a relatively low amount really, I imagine that a 3D model set up
for a full array of stunts has to be experiencing double that at
least.</DIV>
<DIV> </DIV>
<DIV>Earl could you do any 3D type maneuvers and measurements with the
Yak?</DIV>
<DIV> </DIV>
<DIV>Very informative discussion BTW, and may result in improved more
efficient building technique, read-- lightest for the desired
strength.</DIV>
<DIV> </DIV>
<DIV>thanks</DIV>
<DIV> </DIV>
<DIV>matt</DIV>
<DIV> </DIV>
<DIV>In a message dated 1/28/2005 1:32:35 PM Eastern Standard Time,
d.pappas@kodeos.com writes:</DIV>
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<DIV><SPAN class=764412918-28012005>That's proof of stall!</SPAN></DIV>
<DIV><SPAN class=764412918-28012005>If the G loading rises suddenly, and
then holds or droops continuously during the roll, then it's probably an
accelerated barrel.</SPAN></DIV>
<DIV><SPAN class=764412918-28012005>If the profile is sudden rise, sudden
drop to maybe 1/2, then onload, you have a real snap.</SPAN></DIV>
<DIV><SPAN class=764412918-28012005></SPAN> </DIV>
<DIV><SPAN class=764412918-28012005>Yia,</SPAN></DIV>
<DIV><SPAN class=764412918-28012005> Dean</SPAN></DIV>
<DIV> </DIV>
<P><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman">d.pappas@kodeos.com</FONT> </P>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT
face=Tahoma>-----Original Message-----<BR><B>From:</B>
discussion-request@nsrca.org [mailto:discussion-request@nsrca.org]<B>On
Behalf Of </B>Rcmaster199@aol.com<BR><B>Sent:</B> Friday, January 28,
2005 11:45 AM<BR><B>To:</B> discussion@nsrca.org<BR><B>Subject:</B> Re:
Snao G's<BR><BR></FONT></DIV><FONT face=Arial color=#000000>
<DIV>
<DIV>Good point. Once in the stall, the model should not see the
same continued G load. Should drop dramatically. If the
plane doesn't stall to begin with, different story.</DIV>
<DIV> </DIV>
<DIV>Matt</DIV>
<DIV> </DIV>
<DIV>In a message dated 1/28/2005 11:23:25 AM Eastern Standard Time,
d.pappas@kodeos.com writes:</DIV>
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<DIV><SPAN class=858241016-28012005><FONT face=Arial color=#0000ff>Let
me add another two cents worth ...</FONT></SPAN></DIV>
<DIV><SPAN class=858241016-28012005><FONT face=Arial
color=#0000ff>Earl,</FONT></SPAN></DIV>
<DIV><SPAN class=858241016-28012005><FONT face=Arial
color=#0000ff>What is the sampling rate on your data
logger?</FONT></SPAN></DIV>
<DIV><SPAN class=858241016-28012005><FONT face=Arial color=#0000ff>Can
you see if the maximum 13-Gs at 100 MPH was sustained for the
entire half second or so that it took to complete the
snap,</FONT></SPAN></DIV>
<DIV><SPAN class=858241016-28012005><FONT face=Arial color=#0000ff>or
was it a short spike (like 0.1 second) and then sustained
at say half of that value, for the rest of the
snap.</FONT></SPAN></DIV>
<DIV><SPAN class=858241016-28012005><FONT face=Arial color=#0000ff>Of
course, if the data logger samples once a second, we have almost no
way of knowing.</FONT></SPAN></DIV>
<DIV><SPAN class=858241016-28012005><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=858241016-28012005><FONT face=Arial
color=#0000ff>Later,</FONT></SPAN></DIV>
<DIV><SPAN
class=858241016-28012005>
<FONT face=Arial
color=#0000ff>Dean</FONT></SPAN></DIV></FONT></BLOCKQUOTE></DIV></FONT></BLOCKQUOTE></FONT></BLOCKQUOTE></DIV></FONT></BLOCKQUOTE></FONT></BLOCKQUOTE></DIV>
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