Methods for altitude changes

In rec.aviation.piloting Mxsmanic wrote:
writes:

Your understanding of real autopilots is extremely simplistic and
incorrect.

Explain the errors.

Why, you'll just argue about it?

All real aircraft piloted by humans have control pressure, including
aircraft with fly-by-wire systems.

Most, rather than all. And in some aircraft the pressure is simulated, simply
because the pilot expects it. Obviously, it wouldn't make sense to simulate
control pressure and then use that to control an autopilot. Besides, as I've
said, autopilots don't exist for the purpose of relieving control pressures.

Read my above sentence slowly and carefully.

Nowhere in there did I say anything about where the control pressure
comes from.

While it is true that "autopilots don't exist for the purpose of
relieving control pressures", it is also true that ice cream has no
bones.

Neither statement has anything to do with how autopilots work.

--
Jim Pennino

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In rec.aviation.piloting Mxsmanic wrote:
writes:

That's because you have never been in a real airplane.

No, it's because I know that there are many different types of airplane, and
that such generalizations are not universally applicable in consequence.

Other than maybe something exotic like a SR-71, they ALL do that.

I wonder if a pilot who had flown only SR-71s would insist that all aircraft
have unstarts.

Probably not, but he would agree with the previous poster's statements
you snipped out.

--
Jim Pennino

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In rec.aviation.piloting Mxsmanic wrote:
writes:

A couple.

How many is that? Didn't you say that real pilots learn this during their
training?

I already gave you the definition of "couple".

Have you forgotten it already?

Is your native lanuage something other than English?

--
Jim Pennino

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writes:

Why, you'll just argue about it?

Only if your explanation is unsatisfactory.

--
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writes:

I already gave you the definition of "couple".

Have you forgotten it already?

Is your native lanuage something other than English?

Put more simply, the amount by which the mixture must be adjusted in a
specific aircraft for specific conditions is _not_ a part of the training of
real pilots, contrary to the assertion made along those lines. QED.

--
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Mxsmanic wrote:

writes:


I already gave you the definition of "couple".

Have you forgotten it already?

Is your native lanuage something other than English?


Put more simply, the amount by which the mixture must be adjusted in a
specific aircraft for specific conditions is _not_ a part of the training of
real pilots, contrary to the assertion made along those lines. QED.

Incorrect. Nor are you qualified to gainsay me, as you have no aviation
experience. The end.

In rec.aviation.piloting Mxsmanic wrote:
writes:

Why, you'll just argue about it?

Only if your explanation is unsatisfactory.

Now you are argueing about argueing...

--
Jim Pennino

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"Mxsmanic" wrote ...

Autopilots certainly want to trim out control pressure. Think about what
would otherwise happen when you disconnect the autopilot. Duh.

It actually _does_ happen when you disconnect the autopilot, in some
aircraft.
The purpose of the autopilot is not to relieve control pressure, it is to
fly
the aircraft. In aircraft that use trim for the autopilot, the aircraft
may
be stable when you turn the autopilot off. However, in aircraft that
directly
manipulate the controls with the autopilot, the aircraft may suddenly
change
attitude when the AP is shut off, if the AP has been compensating for
something (such as an engine failure)

.... which implies control pressure ...

while it has been operating. This has
caused accidents.

I can see you have actually begun to learn something about autopilots. There
is more to the story, though. Would you believe some autopilots act on both
the control surface and the trim device?

Snowbird writes:

I can see you have actually begun to learn something about autopilots. There
is more to the story, though. Would you believe some autopilots act on both
the control surface and the trim device?

There are several ways to implement an autopilot. But no autopilot is
designed to relieve control pressures.

--
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In rec.aviation.piloting Mxsmanic wrote:
Snowbird writes:

I can see you have actually begun to learn something about autopilots. There
is more to the story, though. Would you believe some autopilots act on both
the control surface and the trim device?

There are several ways to implement an autopilot. But no autopilot is
designed to relieve control pressures.

Another true but worthless statement.

An autopilot is designed to control an airplane.

As a side effect of the design purpose, it will relieve control pressure.

--
Jim Pennino

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