Pitch trim take off

[Zgredd 21]

Like before in A320 Extended, I have to set pitch trim -0.1 comparing to value set in MCDU. For example: in MCDU 0.8 and I have to set trim to 0.7 - only then copilot will accept it, reading checklist.

Is it ok?

[Aerosoft Team [Inactive Account] 51558]

Why do you think it is not okay?

[Zgredd 21]

I just don't understand it. Should't I set the same pitch trim value as set in MCDU?

[Cheyenne Chief Pilot 829]

For me it has worked with 0.8.

Do you use the numpad or a trim axis?

Anyway, a 0.1 difference should not matter at all.

[Zgredd 21]

For me it has worked with 0.8.

Do you use the numpad or a trim axis?

Anyway, a 0.1 difference should not matter at all.

I place mouse cursor over trim wheel in VC and set with mouse scroll wheel.

Of corse it's not a big difference, just I'm curious why it always have to be set -0.1, not the same value as in MCDU.

[Cheyenne Chief Pilot 829]

And do you read the scale next to the trim wheel or the figure shown on the lower ECAM - F/CTL page?

[Zgredd 21]

Yes of corse. I always check it on ECAM.

[Zgredd 21]

Between -0.1 and +0.8 is a very big difference!

No no. Not -0.1 and + 0.8. Look my 1st post. If +0.8 in MCDU then have to set +0.7 to push checklist forward. Always -0.1 difference.

[tup61 185]

The problem here is NOT a slight difference in trim. The problem is that the checklist stops and won't continue unless you set trim to 0.7 no matter what.

Just now I was ahead of the checklist and already set trim to 0.8 (as the MCDU tells me to, it always does btw, it never shows me another setting). I checked 0.8 on the MCDU F/CPL and it was spot on. When the checklist came to this 'trigger' it stopped... until I set pitch trim to 0.7 after which the setting was ackowledged. And then I set it to 0.8 again...

So I don't know if the problem is, as the OP says, the trim has to be set 0.1 lower (which isn't a big problem), but the problem is the checklist only seems to accept 0.7.

[Zgredd 21]

So I don't know if the problem is, as the OP says, the trim has to be set 0.1 lower (which isn't a big problem), but the problem is the checklist only seems to accept 0.7.

Belive me. Always -0.1.

[Cheyenne Chief Pilot 829]

Head-scratch time: For me it has always worked with 0.8 - before and after release.

EDIT: Tried 0.7 myself but this wasn't accepted by the checklist system.

[Zgredd 21]

EDIT: Tried 0.7 myself but this wasn't accepted by the checklist system.

With 0.8 set in MCDU?

[Cheyenne Chief Pilot 829]

Affirm.

[D192 83]

I don't even look at the numeric value to be honest - I always set the trim just below 1.0 and the checklist always accepts it.

[Kaplan 4]

Like before in A320 Extended, I have to set pitch trim -0.1 comparing to value set in MCDU. For example: in MCDU 0.8 and I have to set trim to 0.7 - only then copilot will accept it, reading checklist.

Is it ok?

Hi zgredd!

Why do you have -0,1 Do you change CG in % MAC to 29 in your mcdu?

THS Setting for takeoff is depends on the CG.

e.g CG 23 THS is 1,2UP

CG 33 THS is 1DN

[Zgredd 21]

I didn't change CG. I set fuel 9.0, no cargo, no passengers, in MCDU CG=26 and trim up0.8. I set flaps 1.

Trim wheel is set to 0 by default. +0.7 pushes checklist forward.

[Kaplan 4]

Hi Zgredd!

Try with Block 7.8 Flaps 2 THS UP0.6 Flex 55 THR RED/ACC 1990/2500 CG 25.0 Check if it works.

Block 7.8 Flaps 1 THS UP1,2 Flex 56 THR RED/ACC 1995/2300 CG 23.0

[Kaplan 4]

@ Kaplan,

The only important item in your example is missing...CG

Flap setting etc is totally irrelevant concerning trim setting, it's only CG that counts.

Sorry mate here you go CG25.0