Out of trim!

[Loadcontroller]

If we take a look on the loadsheet we can see whether the a/c is in/out of trim... with the zero-fuel weightlimits

Off course this gives a problem during take-off and landing if we succeed these limits....

From how many index's you should really start to panic...

A plane can't leave out of trim I know...

But from how many index's is it really unable to take-off or land...??

Suppose that we have limits +11,67/+59.55

[SN30952]

But from how many index's is it really unable to take-off or land...??Suppose that we have limits +11,67/+59.55

Did you make a mistake or what, Loadcontroller, and you can't catch sleep now?
What aircraft are you talking?

[Loadcontroller]

But from how many index's is it really unable to take-off or land...??Suppose that we have limits +11,67/+59.55

Did you make a mistake or what, Loadcontroller, and you can't catch sleep now?
What aircraft are you talking?

No, I'm under training for the moment and saw a movie at work about a/c out of trim with a lot of problems during take-off....

Off course my a/c will !!!! NEVER !!! leave out of trim....
Quiet stupid if you do that....

So do you have any idea....??

Airbus 320

[SN30952]

No, I'm under training for the moment

And is the training on manual loadsheets?

[Loadcontroller]

No, I'm under training for the moment

And is the training on manual loadsheets?

I still have to start with my training manual loadsheet...

and still have to learn everything

But I know the working of a loadsheet....

[SN30952]

I had some experiences when I was standing in front of the office and looking after the aircraft if it can take-off or not...
So I guess :
- you will never know the actual CG
- you don't have to be frightened, these limits are determined with some reserve...

TBSC, please warn me if for some reason beyond my free will, I happen to board an aircraft for which you prepared the LC, so I can get of in time. Thanks.

So I know:
- The CG might be changing all the time in flight, but it also corrected all the time. (it is not a basket hanging under a hot air balloon, isn't it?)
- And I'm frightened if you not stay within the limits, luckily the captain / pilot has to accept your LC, but he can also refuse it.

[744rules]

@loadcontroller,

these limits are there for some reason, and not just to keep you busy.

As said previously, a lot of factors can influence the (im)balance of the a/c (some a/c cannot fly empty, others have problems when fully loaded, .....)

I suggest you get your weight & balance course first. If you have more requests/questions, check with the trainers. After that, get some practice so you get familiar with different situations. Don't hesitate to ask some older colleagues some advice, especially if you're not sure about what you've been doing (better save than sorry)

Good luck, and keep them in trim

[SN30952]

You are right, the a/c is setting the trim permanently to balance every changes of CG. BUT only if once got airborne! The first seconds of the flight, when you get airborne can be hmmm... exiting if you set a wrong CG before the flight.
That is why you need the MACTOW from the load sheet not to get into trouble in that minute.

Indeed that is a critical moment, as well as the landing.
But a changing CG on ground can cause also trouble. I have seen the nose of a Caravelle going up, just by the movement of one person in the otherwise empty cabin. (As you know this aircraft type has stairs under the tail, and that person wanted to leave the aircraft by that stair).
You wrote MACTOW, TBSC. Is that Magyar for MAXTOW?

[744rules]

Fons,

I think he means % MAC (mean aerodynamic chord) at TOW

[SN30952]

Fons,
I think he means % MAC (mean aerodynamic chord) at TOW

Finding the Mean Aerodynamic Chord

Neutral Point and Static Margin Calculation.

Center of Gravity Calculator

The chord is the dimension of the airfoil from its leading edge to trailing edge.
An airfoil is the cross section of a wing.
Mean aerodynamic chord, is the chord located along the wing and has the aerodynamic property of the two-dimensional wing.

Center of Gravity. The c.g. is a point about which the nose-heavy and tail-heavy moments are exactly equal in magnitude. If the aircraft is suspended from the c.g., it will not have a tendency to pitch in either direction (nose up or down). The weight of the aircraft (or any object) may be assumed to be concentrated at its c.g.

Mean Aerodynamic Chord (MAC). The MAC is established by the manufacturer who defines its leading edge and its trailing edge in terms of inches from the datum. The c.g. location and various limits are then expressed in percentages of the chord. The location and dimensions of the MAC can be found in the Aircraft Specifications, the TCDS, the aircraft flight manual, or the aircraft weight and balance report.

The datum is an imaginary vertical plane from which all horizontal measurements are taken for balance purposes with the aircraft in level flight attitude. The datum is indicated in most Aircraft Specifications or TCDS. On some of the older aircraft, when the datum is not indicated, any convenient datum may be selected. Once the datum is selected, all moment arms and the location of the permissible c.g. range must be taken with reference to it.

The arm (or moment arm) is the horizontal distance from the datum to the c.g. of an item.

[Loadcontroller]

Ok thx guys... I've just started the training...

Thx for the reply's .... wish me good luck

Greetz...

[SN30952]

Ok thx guys... I've just started the training...
Thx for the reply's .... wish me good luck Greetz...

Yes we do, lucky guy.
Keep us posted on the progress.
And when encountering cool websites about the job and training, please post the links, Loadcontroller.