"Jim Macklin" wrote in message
news:J4Wlg.49291$ZW3.49195@dukeread04...
No, I said the buffet comes from the wing root, but the
actual stall is when the tail stalls and looses lift (down
force) and then the nose pitches down because the still
flying wing CP is behind the CG.

If that were true, then it wouldn't be possible to sustain a stall (in, say,
a C172) by maintaining back pressure on the yoke. But in fact, such a stall
can be sustained: the plane is stalled because the wings are past the
critical angle of attack; and the tail, which is *not* stalled and does
*not* lose lift, can hold that angle of attack if up-elevator pressure is
continued.

It is possible to stall the tail if the CG is too far forward. This is
especially likely during a landing flare, resulting in a sudden drop of the
nose. But that's not how a normal stall occurs.

http://www.faa.gov/library/manuals/a...83-25-1of4.pdf

Are you referring to the paragraph about stalls on p. 3-21? First, the
information there is partly incorrect--there is no reason to think that the
tail's (downward) lift ceases during a normal stall, and (as I mentioned
above) the sustainability of such a stall (by continued back pressure) shows
that the tail's lift does not cease. Second, the paragraph does not state
that the tail's alleged loss of lift begins the plane's stall, but rather
that it contributes to a stall *recovery*.

--Gary