Michael wrote:
On May 30, 3:36 am, "Hilton" wrote:
Why? Because all posts have made the (probably) incorrect assumption that
the aircraft somehow fly wings-levels to its demise. That just won't
happen. Forget dihedral, that won't stop it going into a spiral.

You're right, of course. The only way that will happen is with
artificial stability augmentation (a single axis autopilot). With a
two axis autopilot the plane will hit at stall speed. It may or may
not be wings level, depending on the stall characteristics.

See, this is what made the question such a good one. It allows lots
of room to explore different aspects of aerodynamic stability.

Michael

I would respectfully disagree with you and Hilton on this one :-)There
should be no "of course" and no autopilot issues are involved in the
question that I can see.

The aircraft, if in trim at 110 kts will be trimmed for whatever angle
of attack is producing that airspeed. Unless there is something added to
the problem and assuming all factors normal with balance and stability
issues, what should be expected normally is a phugoid starting nose low
as the engine quits to recover the trim speed. I'm assuming no fuel
imbalance or rigging issues that could cause a bank input entry into the
problem.

So using just the aspects of the problem as presented;

Where the aircraft is along that phugoid and the exact airspeed to
expect at ground impact would depend on the altitude remaining and the
dampening properties present determining the decreasing phases of the
phugoid.

Just what is it that you are expecting to happen to cause the necessary
bank/lift imbalance to enter a nose low spiral?

--
Dudley Henriques