747 trim up works but trim down doesn't

[Ephedrin]

31 minutes ago, wsmeier said:

From my own two eyes. Keep in mind that I'm referring to the airplane being on the ground without any aerodynamic forces. The few times I've seen the trim work in one direction but not the other, a quick shove or pull of the yoke has resolved the issue for me.

I think I might have misread your post above. I thought you meant that to use the trim in flight you would have to actually steer the airplane into that up or down directions. There is a lot of misunderstanding regarding the use of trim in the sim community and so I‘m a bit quick sometimes to try to correct that. 😄 

[X_Man]

On 11/7/2018 at 8:21 AM, gstreet said:

I may be misunderstanding him but I think he is saying once he centers his control column the stabilizer trim works. I had this problem from walking around the aircraft on the ground with chaseplane using the arrow keys which moved my control column all the way down so I couldn’t trim up. As soon as I recentered it the trim worked. I assume this is the way the actual aircraft functions. 

That's exactly what I was trying to say LOL 🙂

[windshearDK]

I had that before pushback when I set the take of trim sometimes. Just move the yoke og what ever you control your plane with back and forward, and pronto you can now trim up.