limit of trim = limit of travel?

Mxsmanic wrote in
:

writes:

The 182RG, the REAL airplane, has enough pitch trim to maintain slow
flight just above the stall.

I'll continue to experiment.


The trim on sims behaves nothing like it does in the real airplane almost
to the point of having a different purpose.


Bertie

wrote in news:3296b365-96bd-4b26-a9ba-
:

On Apr 26, 11:33 am, WingFlaps wrote:

Look at the size of a trim surface and the size of the elevator. Think
about which one is more powerful. You can't stall a 182 with full
trim, but you can with the yoke. OK?

Cheers


Don't give the impression that the trim tab is doing the flying. It's
not. Trim tab down moves the elevator up, and the elevator controls
the pitch. With some power applied the airplane could stall. Power
off, not likely; just a slow glide. The 182 has one of the most
powerful trims I've come across, apart from the 180/185 stabilizer
trim system that will keep you very busy in an overshoot.


Actually, there are plenty of airplanes with tabs not much bigger than trim
tabs that use them to fly the airplane. There is no connection whatsoever
between the surface and the stick. All done by the tab. I don;'t think
anyone is making any of them these days. Last new design I can think of is
the DC-8.



Bertie

WingFlaps writes:

No, that doesn't sound right.
The stall horn is supposed to sound before the stall speed is reached.

It does, but only a second or two before (assuming that airspeed is still
falling). If I take remedial action instantly the stall does not occur.

Mxsmanic wrote in
news
WingFlaps writes:

No, that doesn't sound right.
The stall horn is supposed to sound before the stall speed is reached.

It does, but only a second or two before (assuming that airspeed is still
falling). If I take remedial action instantly the stall does not occur.


A stall will never occur. Computers don;'t stal.


Bertie

Buttman wrote in
:

WingFlaps wrote:

On Apr 27, 7:03Â*am, Mxsmanic wrote:
I just tried a few experiments

No, that doesn't sound right.
The stall horn is supposed to sound before the stall speed is
reached.

Cheers

"supposed to", but doesn't always. I've flown planes (especially
cessnas with their crappy cereal-box-toy-quality plastic stall horns)
that don't go off at all, but will test fine on the ground.


What, you didn't stick chewing gum in them to fail them so your students
would learn what it was like when they failed?

Bertie

Buttman wrote in news:4813a805$0$30167
:

Stealth Pilot wrote:

oxygen is a valuable resource. please stop wasting it.
Stealth Pilot

someones grumpy...


There you go again. There's a deserving cockroach not getting his fair
share.


Bertie

Buttman wrote in news:4813aa40$0$30228
:

Bertie the Bunyip wrote:

Buttman wrote in
:

WingFlaps wrote:

On Apr 27, 7:03Â*am, Mxsmanic wrote:
I just tried a few experiments

No, that doesn't sound right.
The stall horn is supposed to sound before the stall speed is
reached.

Cheers

"supposed to", but doesn't always. I've flown planes (especially
cessnas with their crappy cereal-box-toy-quality plastic stall horns)
that don't go off at all, but will test fine on the ground.


What, you didn't stick chewing gum in them to fail them so your students
would learn what it was like when they failed?

Bertie

Oh bertie, you're such a card

I know. And you're such an idiot.


Bertie

On Apr 26, 1:50 pm, Bertie the Bunyip wrote:

Actually, there are plenty of airplanes with tabs not much bigger than trim
tabs that use them to fly the airplane. There is no connection whatsoever
between the surface and the stick. All done by the tab. I don;'t think
anyone is making any of them these days. Last new design I can think of is
the DC-8.

Bertie

Servo tabs. Sometimes with a spring onto the surface itself, for
low-speed control, and sometimes with no connection other than the
tab's hinge to the surface. But it does move the control surface,
which is what controls the airplane. The tab itself doesn't fly the
airplane. It actually moves in the opposite direction to the surface.

On Apr 26, 12:37 pm, WingFlaps wrote:

The idea was that if he looked at the area of the trim tab he would
realize it cannot generate full surface deflection. I've not tried
winding in full trim with power on to see if a stall results. I would
have guessed that Mr Cessna would not make the trim that powerful...

It's that powerful. With the trim centered, at full power, you're in
a climb. Rolling in full up trim will make the climb steep enough to
stall the airplane.

Dan

wrote in
:

On Apr 26, 1:50 pm, Bertie the Bunyip wrote:

Actually, there are plenty of airplanes with tabs not much bigger
than trim tabs that use them to fly the airplane. There is no
connection whatsoever between the surface and the stick. All done by
the tab. I don;'t think anyone is making any of them these days. Last
new design I can think of is the DC-8.

Bertie

Servo tabs. Sometimes with a spring onto the surface itself, for
low-speed control, and sometimes with no connection other than the
tab's hinge to the surface. But it does move the control surface,
which is what controls the airplane. The tab itself doesn't fly the
airplane. It actually moves in the opposite direction to the surface.


That's right. Lots of biggies used them in the old days. There are also
balance which just aid a conventionally controlled surface in a similar
way. Those I have flown. Generally htey also have a spring tab which is
adjacent and gears down the action of the servo or balance tab. Without the
spring tab the servo or balance tab would make the control surface more
sensitive at higher speeds, so the spring tab acts as a kind of artificial
feel.


Bertie