BRS and descent rate

"Teacherjh" wrote in message
...
Can a (properly constructed) canard deep-stall if the nose is brought
down, and
then up rapidly so that momentum helps carry it high enough (even after
the
canard stalls) so that the main wing stalls?

I don't think so, but I don't know for sure.

The problem with the deep stall is that the canard is still flying and even
as it stalls, it starts flying again before the main wing does. Since in
the momentum-driven stall you're talking about, the canard would not be
flying, I believe that the airplane would eventually pitch back down again,
given the large amount of drag being created by the main wing below and aft
of the CG. The canard would not be opposing the pitch-down moment, since it
wouldn't start flying until after the main wing had recovered.

Of course, if the CG were too far aft, that might not happen, but then if
the CG were too far aft, you'd probably be dealing with a more conventional
deep-stall condition anyway.

Pete