Problems in a commercial flight

Ron Natalie writes:

Sometimes, and yes.

What makes them asymmetrical?

Spiral is not an oscillation. Spiral is a departure from positive
stability when you push things too far.

Spiral instability.

Absolutely and totally incorrect.

It depends on the aircraft, but my generalization is mostly valid.

You should go read a introductory
pilots book section on flight aerodynamics.

That's the problem with pilots' books: they never go past the introduction to
these complex topics.

Now your an aerodynamics expert?

I've never claimed to be an expert. But I do know something about it.
Asserting or sharing knowledge is not a claim of expertise.

--
Transpose mxsmanic and gmail to reach me by e-mail.

Mxsmanic wrote:
Ron Natalie writes:

Sometimes, and yes.

What makes them asymmetrical?

Spiral is not an oscillation. Spiral is a departure from positive
stability when you push things too far.

Spiral instability.

Instability is not necessarily an oscillation. You said oscillation.
You are wrong


Absolutely and totally incorrect.

It depends on the aircraft, but my generalization is mostly valid.

No it isn't. If you think the control surfaces can't move without
either the pilot or the autopilot acting on them, you're daft. It's
true in EVERY SINGLE AIRPLANE IN THE WORLD. Have you ever heard of
the concept of trim? This is a little aerodynamic device that moves
the control surface dynamically to obtain given stable position.

Further some airliners don't even have a direct connection between
the yoke/autopilot and the control surface. Instead, these are
connected to a servo tab that moves the surface by aerodynamic means.

You should go read a introductory
pilots book section on flight aerodynamics.

That's the problem with pilots' books: they never go past the introduction to
these complex topics.

Yes, but they explain the simple topics you don't seem to begin to
understand.