combat trim dampening

[FLS]

So, the red line indicators on the plane would line up center while inputs would vary?   Is that what happens?  My understanding might be wrong 

The red trim tab indicators show the positions of the trim tabs.

When you move your game controller the cockpit joystick moves. When you hold your controller in place the cockpit joystick stays in place. The cockpit joystick is showing you the current controller input seen by AH. When you hold your controller in place, press Trim Set, and release your controller to center, the cockpit joystick remains in place and does not return to center. AH is still seeing the same controller input, not the return to center.

When you experiment with Trim Set, compare the cockpit joystick position with your game controller position and the effect should be clear.

[muzik]

  When you have this bounce issue do you have flaps deployed?

Most likely. As I said, seems to happen coming out of hard turns/turn fights.

    With nose bounce I find it falls into 3 areas,rudder causes a side to side bounce and elevator causes an up and down bounce,then the combination of the 2 causes an oscillation of the nose.

I don't recall any other directional bounce than up and down oscillation that last for a second or so. It's a very noticeable oscillation that makes you hold fire until it stops; it's not a matter of simply being out of coordination with the shot and it's not a persistent problem with every encounter. It's a semi-rare occurrence that in hind sight seems to happen under specific circumstances.

Once you know which axis is the problem,you will need to adjust the scaling,deadpan and dampening to dial out the bounce.

I don't believe I have any issues with scaling or deadpan. I generally tend to keep a generous buffer zone.

[FLS]

Most likely. As I said, seems to happen coming out of hard turns/turn fights.

I don't recall any other directional bounce than up and down oscillation that last for a second or so. It's a very noticeable oscillation that makes you hold fire until it stops; it's not a matter of simply being out of coordination with the shot and it's not a persistent problem with every encounter. It's a semi-rare occurrence that in hind sight seems to happen under specific circumstances.

I don't believe I have any issues with scaling or deadpan. I generally tend to keep a generous buffer zone.

Could you be more specific about "buffer zone"? You want to have as little deadband and damping as you can get away with.

When you turn and slow down Combat Trim trims you for the slower speed. When you stop turning you accelerate and this raises your nose as the aircraft tries to maintain the trim speed. You push the nose down to stay level at the same time that CT is trimming the nose down for the acceleration. Now you are descending and accelerating faster. You pull the nose up and hopefully CT has trimmed you close to your speed and you are now relatively stable. If you have damping your reaction to CT will be late in proportion and if you have deadband you will be moving your stick through a region where it isn't changing input while you try to correct for CT.

Deadband and damping are best used as required to keep the auto pilot on and alleviate spiking. Scaling is a personal preference but it's important to understand how trim affects scaling. You only get the finer control at trim speed when the stick is near center. That's why CT is a good idea if you scale. If you need to have some deadband you might be more stable shooting with CT off and a little nose down trim to avoid the slack between pushing and pulling the stick.

 

[hitech]

Most likely. As I said, seems to happen coming out of hard turns/turn fights.

I don't recall any other directional bounce than up and down oscillation that last for a second or so. It's a very noticeable oscillation that makes you hold fire until it stops; it's not a matter of simply being out of coordination with the shot and it's not a persistent problem with every encounter. It's a semi-rare occurrence that in hind sight seems to happen under specific circumstances.

I don't believe I have any issues with scaling or deadpan. I generally tend to keep a generous buffer zone.

The condition you are describing sounds like you are simply releasing the stick to fast, and have nothing to do with the current trim setting.


HiTech

[FLS]

The condition you are describing sounds like you are simply releasing the stick to fast, and have nothing to do with the current trim setting.


HiTech

Whenever I see "nose bounce" my first thought is that it's not a bug it's a feature of the dynamic flight model, you push the air and it pushes back. Since that happens all the time I think  Muzik might have other issues but the reduced aerodynamic damping at lower speeds makes the bounce more apparent and could explain why it seemed a rare occurance.

[muzik]

The condition you are describing sounds like you are simply releasing the stick to fast, and have nothing to do with the current trim setting.


HiTech

That could be. I probably wouldn't pay much attention to how fast I nose over. Then is this an anomaly in the FM?

Nothing about that bounce indicated I was stalling, so as long as the flight surfaces still have lift it shouldn't it go where my controls pointed?

[hitech]

That could be. I probably wouldn't pay much attention to how fast I nose over. Then is this an anomaly in the FM?

Nothing about that bounce indicated I was stalling, so as long as the flight surfaces still have lift it shouldn't it go where my controls pointed?

Not immediately. You are dealing with rotational inertia.

[Triton28]

Flaps out with CT on, I get nose bounce too.  My solution has been to click CT off when I'm in a fight and trim the nose down.  No more nose bounce. 

[Randy1]

If you are manual trim with lets say takeoff trim, pick up more speed then hit CT, it can be slow to respond. 

It is very pronounced when there is a big difference in manual trim and the setting for say level flight.  On NOEs I have slammed a couple of planes in having the plane in manual heavy down trim then switching to auto level flight a few feet above the good earth.    The auto level is slow to respond to a mismatch in trim settings.

[Ack-Ack]

If you are manual trim with lets say takeoff trim, pick up more speed then hit CT, it can be slow to respond. 

It is very pronounced when there is a big difference in manual trim and the setting for say level flight.  On NOEs I have slammed a couple of planes in having the plane in manual heavy down trim then switching to auto level flight a few feet above the good earth.    The auto level is slow to respond to a mismatch in trim settings.

To prevent that, trim manually to approximate neutral before hitting any of the auto trim commands.

ack-ack

[colmbo]

Auto-angle is your friend.