REFLECTOR:Determining AFT CG Limit

Ronnie Brown reflector@tvbf.org
Sat, 6 Dec 2003 08:34:04 -0500


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There's been a lot of discussion the last couple of months about flat =
stall on Velocities and it has even come up in the more recent VG =
conversations.

But I don't recall any discussions on how to determine where the aft CG =
limit is.  Just what phenomenon are we looking for when we are on the =
ragged edge of AFT CG other than the dreaded Flat Stall???

On a conventional airplane, the aft CG is determined by the lack of =
pitch stability as the CG is moved rearward.=20

Danny Maher ran a bunch of "trailer" tests and there were accidents but =
beyond that, just how do you determine what the aft CG is (other than =
use the numbers the factory provides).

Ronnie Brown=20

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<DIV><FONT size=3D2>There's been a lot of discussion the last couple of =
months=20
about flat stall on Velocities and it has even come up in the more =
recent VG=20
conversations.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>But I don't recall any discussions on how to =
determine where=20
the aft CG limit is.&nbsp; Just what phenomenon are we looking for when =
we are=20
on the ragged edge of AFT CG other than the dreaded Flat =
Stall???</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>On a conventional airplane, the aft CG is determined =
by the=20
lack of pitch stability as the CG is moved rearward.&nbsp;</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Danny Maher ran a bunch of "trailer" tests and there =
were=20
accidents but beyond that,&nbsp;just how do you determine&nbsp;what the =
aft CG=20
is (other than use the numbers the factory&nbsp;provides).</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Ronnie Brown</FONT>&nbsp;</DIV></BODY></HTML>

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