"Corky Scott" wrote in message
...
On Fri, 10 Dec 2004 18:14:12 -0500, "Kyle Boatright"
wrote:

According to the early reports, the crashed T-34 had the Baron spar mod,
which is an appropriate and approved modification/structural improvement.
Despite that, you can still over G an airplane, and rolling pull out's
(and
the associated asymmetric G loading) are a worst case scenario. Whether
it
shows in the POH or not, all aircraft (including modern fighters) have a
substantially lower G margin under assymetric G loading.

KB

AVWeb has a story out today saying that the wing failed in an area
that was totally different from any of the previous failures and
different from the fix the AD covered.

Corky Scott

Which probably proves my point that if you go fast enough and pull hard
enough on the control stick, something will break. I don't have T-34 spec's
in front of me, but my guess is that the aerobatic g limit is something like
6, with an ultimate (failure) limit of 9 g's. In a rolling maneuver, each
of these figures is reduced by 1/3 or so, so in rolling flight, the wing's
designed failure point is roughly 6 g's... Exceed that, and you're likely
to have a very bad day.

The same concept applies to a C-172 or an Ercoupe, although the G limits
vary...

KB