On 2023-03-01, Fons Adriaensen wrote:
What you do there is:
1) you push down on the yoke to recover airspeed,
Do that if you want to crash even sooner.
You also do that in order to avert an impending stall.
2) you use ailerons to level off,
You need to use ailerons, but certainly not to level off.
To level off from the spiral or as the case may be, from an excessive
roll. The fall is an another matter, to be dealt with separately.
3) apply lift and drag via flaps
Your flaps may be ripped off if you do that.
That's why you don't apply them in full, or willy-nilly.
This is all *so completely wrong* that I don't know where to start to
correct it.
Is it, though? I kind of think I know what you are talking about in
pilot training. However what I'm talking about is the optimized control
law of a modern fly-by-wire fighter jet, or say something like an
Airbus jumbo. Especially the former *will* know it's aerodynamically
"unstable" (so as to say it's more "general" in its solution), so that
in general the optimum path back from a death spiral will almost
necessarily go through things like intermittent stalls on all flight
control surfaces.
Sure, human pilots typically haven't been trained to do anything of the
like. Commercial pilots probably shouldn't, at all. But if you think
about how to control an aircraft in full, how to control its full
state space while observing the same, control theory wise, you'll fast
see the easy and safe manoeuvre taught to pilots is *not* the optimum
one. And in fact it's not what highly automated fighter jets such as the
F22 or the F35 really do; nor does any one of the modern Airbus jets.
They in fact employ spoilers and sometimes even flaps, by automation,
they do pull down even in a heavy spin in order to preserve planform
stressess, and so on.
Fons, surely it shows I've not flown an aeroplane in my life. But at the
same time, it surely also shows you've never written a line of code
which would automatically and optimally take an airplane optimally out
of <any untoward condition>. (Neither have I. But at least I've thought
about it all, rather systematically and seriously. I even see immediate
solutions which the pilot academy does not; say, spoiling your energy
from the death spiral by putting your craft into maximum structurally
permitted overall stall. You *can* do that and recover from it, you
know.)
I posted the essentials of getting out of a spiral a week ago.
Please then post a link into the archives. Apparently I could benefit
from them.
--
Sampo Syreeni, aka decoy - [email protected], http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
_______________________________________________
Sursound mailing list
[email protected]
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit
account or options, view archives and so on.
