Michael

On Jun 3, 4:55 pm, More_Flaps <Morefl...@> wrote:
> Here's my understanding : If the yoke gives force feedback of the out
> of trim condition (you hold attitude and then trim) then if you turn
> the trim the wrong while then holding attitude yoke pressure will
> increase -as Tina says.

In theory this is right - but in practice you will have to turn it a
long time before the increase is noticeable with certain trim systems.

> If it doesn't then you are not holding
> attitude OR the stick is not connected directly to the elevator
> surface (e.g. elevator is hydraulic or trim surface powered).

There is a third option - this is where the trim surface is not
connected to the elevator - which is indeed the case. The yoke forces
come from the elevator not being 'in trail' with the stabilizer in
such a system. Since the angle of the stabilizer changes very little
as trim is applied, the force on the yoke in a given position also
changes very little. If you move the yoke in the correct direction to
maintain the pitch attitude, the force on the yoke will change as it
should - but this is also the case in a primitive sim since the stick
has a spring return.

> I know
> the latter is the case for big planes (where elevator forces are too
> large for one armed man power) but what light piston single are you
> thinking about?

I'm thinking of the short wing Pipers - the most popular of which was
the TriPacer.

Michael