B748 - setting elevator trim

[Richard McDonald Woods 168]

I feel that I might be losing it🤣

How do I set the rudder trim value? I can find no mention in the PMDG manuals.

[downscc 1,327]

Rudder trim is aft on the center console.  Use the FCOM.

[skelsey 765]

Rudder trim should be zero for take-off and indeed in-flight unless the airframe is bent (I'm sure PMDG's engineering is impeccable!).

The only time it should be needed is for an engine failure. I've no idea about the -8, but on the -400 you would expect to need roughly 4 units for an inboard and 7 units for an outboard failure on takeoff (4-7... hmmm!).

Top tip: you get about one unit of trim per second when you hold the trim knob full left/right. Thus if you have an engine failure after takeoff, once you are safely airborne and you want to trim the rudder you can just hold the knob and count to 4 or 7 as appropriate and that should get you around the right ballpark.

[Richard McDonald Woods 168]

Thanks for the replies.

I think that I have lost it! I meant that I didn't know how to set the B748 elevator trim.

I shall start a separate post so as to not cause confusion.

[Ephedrin 418]

4 hours ago, Richard McDonald Woods said:

Thanks for the replies.

I think that I have lost it! I meant that I didn't know how to set the B748 elevator trim.

I shall start a separate post so as to not cause confusion.

Yoke buttons 😳

[Iceman2 110]

5 hours ago, Richard McDonald Woods said:

Thanks for the replies.

I think that I have lost it! I meant that I didn't know how to set the B748 elevator trim.

I shall start a separate post so as to not cause confusion.

Well that’s a whole different story. 

One tip though. You’ll need some hydraulics on before being able to move the elevator trim.

[scandinavian13 5,192]

Topic title updated.