Mechanics of Elevator Trim. In Detail.

Hi All,

This post is primarily directed toward student pilots like myself.

First, I am not asking because I want to know the answer (I already
know), but do a little experiment. I have maybe 7 or 8 different
sources of flight information that I rely on for ground school
(Jeppesen, FAA Handbooks, etc), and none of them said _how_ it worked
in sufficient detail, they only said what one must do to make the
plane pitch up or downard.

So for you students, please do not cheat and do what I did, which is
watch the airfoils move as you move the trim control. Also, it would
help if you did not think about the correct answer too much, which
would lead you to the correct answer, thereby defeating the purpose of
my experiment.

So, without cheating, and without asking an experienced pilot or
mechanic,...

What exactly happens when the trim is adjusted to point the nose
upward?

The more specific your answer about the mechanics on airfoil outside
the plane, the better. :)

And remember, no cheating!

Also, for experienced pilots that know the answer, please do not ruin
it by telling everyone before any answers have been given, though if
you are not certain of the answer and would like to speculate, that's
fine. :)

-Le Chaud Lapin-

Le Chaud Lapin <jaibuduvin@**********> wrote in news:426e092d-74b7-4668-
ab0a-0acb5fea7712@34g2000hsf.************.com:

> Hi All,
>
> This post is primarily directed toward student pilots like myself.
>
> First, I am not asking because I want to know the answer (I already
> know), but do a little experiment. I have maybe 7 or 8 different
> sources of flight information that I rely on for ground school
> (Jeppesen, FAA Handbooks, etc), and none of them said _how_ it worked
> in sufficient detail, they only said what one must do to make the
> plane pitch up or downard.
>
> So for you students, please do not cheat and do what I did, which is
> watch the airfoils move as you move the trim control. Also, it would
> help if you did not think about the correct answer too much, which
> would lead you to the correct answer, thereby defeating the purpose of
> my experiment.
>
> So, without cheating, and without asking an experienced pilot or
> mechanic,...
>
> What exactly happens when the trim is adjusted to point the nose
> upward?
>
> The more specific your answer about the mechanics on airfoil outside
> the plane, the better. :)
>
> And remember, no cheating!
>
> Also, for experienced pilots that know the answer, please do not ruin
> it by telling everyone before any answers have been given, though if
> you are not certain of the answer and would like to speculate, that's
> fine. :)
>
> -Le Chaud Lapin-

Good grief. Have you checked your room for solvents?



Bertie

On Jun 7, 10:08 pm, Le Chaud Lapin <jaibudu...@**********> wrote:

> What exactly happens when the trim is adjusted to point the nose
> upward?

What type of plane is this for? I have a Mooney and also fly a 182.
Both trim system are very, very different.

-Robert

"Robert M. Gary" <N7093v@**********> wrote in news:3a16db2f-b15a-4ae5-ab8c-
b46b82a16e3b@z24g2000prf.************.com:

> On Jun 7, 10:08 pm, Le Chaud Lapin <jaibudu...@**********> wrote:
>
>> What exactly happens when the trim is adjusted to point the nose
>> upward?
>
> What type of plane is this for? I have a Mooney and also fly a 182.
> Both trim system are very, very different.
>
> -Robert
>
>

But Le Claud Chapin has already demonstated that with his limited reading
he knows all about aviation. Don't confuse him with mere facts such as
different trim mechanisms. It will destroy his illusion of superiority in
understanding how he, not yet a pilot, better understands the mechanics of
aviation that those of us who are pilots.

On Jun 8, 11:07 am, "Robert M. Gary" <N70...@**********> wrote:
> On Jun 7, 10:08 pm, Le Chaud Lapin <jaibudu...@**********> wrote:
>
> > What exactly happens when the trim is adjusted to point the nose
> > upward?
>
> What type of plane is this for? I have a Mooney and also fly a 182.
> Both trim system are very, very different.

For sake of those of us who only own MSFS, let's say a C172.

-Le Chaud Lapin-

On Jun 9, 7:29 am, "Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way
D0t C0m> wrote:
> "Le Chaud Lapin" <jaibudu...@**********> wrote in messagenews:5c4deac0-2b92-46e8-865e-de41aca34bb7@m3g2000hsc.************.com...
> On Jun 8, 11:07 am, "Robert M. Gary" <N70...@**********> wrote:
>
> > On Jun 7, 10:08 pm, Le Chaud Lapin <jaibudu...@**********> wrote:
>
> > > What exactly happens when the trim is adjusted to point the nose
> > > upward?
>
> > What type of plane is this for? I have a Mooney and also fly a 182.
> > Both trim system are very, very different.
>
> For sake of those of us who only own MSFS, let's say a C172.
>
> Does MSFS emulate the servo tab on the elevator? What does it do when you
> change the trim in the air?
>
> Trying to emulate real life trim on a simulation system that uses spring
> centered control sticks isn't going to work like real life as you may
> already know.
>
> Should I post the spoiler on how a couple other mechanisims work (besides
> servo tabs)?
>

Why not? It woul be ejucational.

Cheers

On Jun 9, 7:29 am, "Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way
D0t C0m> wrote:
> "Le Chaud Lapin" <jaibudu...@**********> wrote in messagenews:5c4deac0-2b92-46e8-865e-de41aca34bb7@m3g2000hsc.************.com...
> On Jun 8, 11:07 am, "Robert M. Gary" <N70...@**********> wrote:
>
> > On Jun 7, 10:08 pm, Le Chaud Lapin <jaibudu...@**********> wrote:
>
> > > What exactly happens when the trim is adjusted to point the nose
> > > upward?
>
> > What type of plane is this for? I have a Mooney and also fly a 182.
> > Both trim system are very, very different.
>
> For sake of those of us who only own MSFS, let's say a C172.
>
> Does MSFS emulate the servo tab on the elevator? What does it do when you
> change the trim in the air?
>
> Trying to emulate real life trim on a simulation system that uses spring
> centered control sticks isn't going to work like real life as you may
> already know.
>
> Should I post the spoiler on how a couple other mechanisims work (besides
> servo tabs)?
>

I'll raise you one to make three additional trim systems. Any more?

Cheers

More_Flaps <Moreflaps@**********> wrote in
news:64b157a9-99f5-4429-9125-d1e2a5aea17d@t12g2000prg.************.com:

> On Jun 9, 7:29 am, "Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way
> D0t C0m> wrote:
>> "Le Chaud Lapin" <jaibudu...@**********> wrote in
>> messagenews:5c4deac0-2b92
> -46e8-865e-de41aca34bb7@m3g2000hsc.************.com...
>> On Jun 8, 11:07 am, "Robert M. Gary" <N70...@**********> wrote:
>>
>> > On Jun 7, 10:08 pm, Le Chaud Lapin <jaibudu...@**********> wrote:
>>
>> > > What exactly happens when the trim is adjusted to point the nose
>> > > upward?
>>
>> > What type of plane is this for? I have a Mooney and also fly a 182.
>> > Both trim system are very, very different.
>>
>> For sake of those of us who only own MSFS, let's say a C172.
>>
>> Does MSFS emulate the servo tab on the elevator? What does it do when
>> you change the trim in the air?
>>
>> Trying to emulate real life trim on a simulation system that uses
>> spring centered control sticks isn't going to work like real life as
>> you may already know.
>>
>> Should I post the spoiler on how a couple other mechanisims work
>> (besides servo tabs)?
>>
>
> I'll raise you one to make three additional trim systems. Any more?
>

I can think of four for a total of five, depending on whether you'd
consider hydraulic centering to be the same as a bungee trim system.
theothersa re of course, a tab system which is th emost common light
aircraft system. the trimmable stab, a'la Cub and most airliners and the
vane, like some early T-carts had.. There're probably some others, but i
can't think of any.


Bertie

On Jun 9, 9:06 am, Bertie the Bunyip <A...@AA.AA> wrote:
> More_Flaps <Morefl...@**********> wrote innews:64b157a9-99f5-4429-9125-d1e2a5aea17d@t12g2000prg.************.com:
>
>
>
>
>
> > On Jun 9, 7:29 am, "Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way
> > D0t C0m> wrote:
> >> "Le Chaud Lapin" <jaibudu...@**********> wrote in
> >> messagenews:5c4deac0-2b92
> > -46e8-865e-de41aca34...@m3g2000hsc.************.com...
> >> On Jun 8, 11:07 am, "Robert M. Gary" <N70...@**********> wrote:
>
> >> > On Jun 7, 10:08 pm, Le Chaud Lapin <jaibudu...@**********> wrote:
>
> >> > > What exactly happens when the trim is adjusted to point the nose
> >> > > upward?
>
> >> > What type of plane is this for? I have a Mooney and also fly a 182.
> >> > Both trim system are very, very different.
>
> >> For sake of those of us who only own MSFS, let's say a C172.
>
> >> Does MSFS emulate the servo tab on the elevator? What does it do when
> >> you change the trim in the air?
>
> >> Trying to emulate real life trim on a simulation system that uses
> >> spring centered control sticks isn't going to work like real life as
> >> you may already know.
>
> >> Should I post the spoiler on how a couple other mechanisims work
> >> (besides servo tabs)?
>
> > I'll raise you one to make three additional trim systems. Any more?
>
> I can think of four for a total of five, depending on whether you'd
> consider hydraulic centering to be the same as a bungee trim system.
> theothersa re of course, a tab system which is th emost common light
> aircraft system. the trimmable stab, a'la Cub and most airliners and the
> vane, like some early T-carts had.. There're probably some others, but i
> can't think of any.
>

I'd count that as the same -the acutuating system doesn't count, just
the aerodynamic priciples. So, if you have four I'll raise you again
one to make five... Any raise on five basic methods?

Cheers

More_Flaps <Moreflaps@**********> wrote in
news:d998f060-3e6a-4b62-8179-88afe9032aa2@i36g2000prf.************.com:

> On Jun 9, 9:06 am, Bertie the Bunyip <A...@AA.AA> wrote:
>> More_Flaps <Morefl...@**********> wrote
>> innews:64b157a9-99f5-4429-9125-d1e2
> a5aea17d@t12g2000prg.************.com:
>>
>>
>>
>>
>>
>> > On Jun 9, 7:29 am, "Capt. Geoffrey Thorpe" <The Sea Hawk At Wow Way
>> > D0t C0m> wrote:
>> >> "Le Chaud Lapin" <jaibudu...@**********> wrote in
>> >> messagenews:5c4deac0-2b92
>> > -46e8-865e-de41aca34...@m3g2000hsc.************.com...
>> >> On Jun 8, 11:07 am, "Robert M. Gary" <N70...@**********> wrote:
>>
>> >> > On Jun 7, 10:08 pm, Le Chaud Lapin <jaibudu...@**********> wrote:
>>
>> >> > > What exactly happens when the trim is adjusted to point the
>> >> > > nose upward?
>>
>> >> > What type of plane is this for? I have a Mooney and also fly a
>> >> > 182. Both trim system are very, very different.
>>
>> >> For sake of those of us who only own MSFS, let's say a C172.
>>
>> >> Does MSFS emulate the servo tab on the elevator? What does it do
>> >> when you change the trim in the air?
>>
>> >> Trying to emulate real life trim on a simulation system that uses
>> >> spring centered control sticks isn't going to work like real life
>> >> as you may already know.
>>
>> >> Should I post the spoiler on how a couple other mechanisims work
>> >> (besides servo tabs)?
>>
>> > I'll raise you one to make three additional trim systems. Any more?
>>
>> I can think of four for a total of five, depending on whether you'd
>> consider hydraulic centering to be the same as a bungee trim system.
>> theothersa re of course, a tab system which is th emost common light
>> aircraft system. the trimmable stab, a'la Cub and most airliners and
>> the vane, like some early T-carts had.. There're probably some
>> others, but i can't think of any.
>>
>
> I'd count that as the same -the acutuating system doesn't count, just
> the aerodynamic priciples. So, if you have four I'll raise you again
> one to make five... Any raise on five basic methods?

Yeah, they;re essentially the same.

Go on. I'll call.


Bertie