Ron Garret writes:

So? That just shows that your sim isn't very good.

What happens when you let go of the controls on your Baron for 40
minutes?

Your other sources are wrong.

They are all wrong, but you are right?

You'll need a real airplane. Your sim is not adequate.

How do you know?

For some level of "constant" that is correct. You can leave it alone
for seconds to minutes, but not tens of minutes (unless you have an
autopilot and are willing to bet your life on its proper operation).

I'll have to try it.

It's not out of the question that all your sim experience would make you
a better IFR pilot than one who trained in a real airplane. Come to LA
and we'll find out.

As soon as I win the lottery.

When your gaze was going back and forth between the chart and the AI and
you forgot to look at the altimeter. (Go back a re-read the scenario.)

Why would the altimeter change? I was in level flight, nicely
trimmed.

Of course. Why would you doubt it?

Different aircraft behave in different ways.

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