Rolloing right problem
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F-16 keeps rolling right during flight, anyone else experienced this problem?
on crosswind landing (TE) it drifts into the wind direction right after touch down, why does it do that? -
F-16 keeps rolling right during flight, anyone else experienced this problem?
on crosswind landing (TE) it drifts into the wind direction right after touch down, why does it do that?Ypu probably have roll linked NWS turned on, so when on the deck, your aileron will control the rudder also.
This leads me to believe it’s an overall calibration problem. Go into the controller setup screen and make sure it’s centered. What stick do you have?
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Use rudder pedals, at that. Don’t use twist sticks like 'self.
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Thanks for the replies. I bought the cougar from ebay thinking it is the best. Every time I shutdown the pc I have to recalibrate the next time. Not sure why the calibration is not saved. I also have siatek rudders. I think the centering solved the roll issue but still at kunsan the jet drifts toward the sea when on three wheels. It does that regardless of approach method 360 or 180 both give drift toward the sea which I think is into the wind. It just doesn’t make sense, when I do turn the NWS “ON” then braking doesn’t make the jet drift but when the NWS is “OFF” then barking causes the drift. I also noticed that the nose wheel don’t steer in the external view, is that related to update 6? it used to steer before I install the Saitek rudders. I am referring only to the graphics and not the operation.
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NWS steers the jet, if it is turned on then the jet should not have uncommanded yaws. I dont really see a problem with what you described…
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I do not have a fix for you but the cougar should work ok after a pc restart. Do you have auto calibrate selected? Ive always had mine set that way. Maybe ask in the Cougar section
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I had the same problem years ago with the cougar.
I switched to MANUAL calibration…where it loads the calibration file and all was solved.
Try to check the curves and deaszones aswell. -
On the ground with crosswind, if I’m not mistaken your nose WILL point into the wind, unlike while in air.
This is due to “weathercock” effect. When on the ground with the wind from your right, your nose will tend to point to the right due to the larger surface of your jet aft of your CG (mainly your big vertical stabilizer). -
On the ground with crosswind, if I’m not mistaken your nose WILL point into the wind, unlike while in air.
Basically, in the air your nose will point “nowhere” … a/c will simply drift but heading will remains constant (only the track will be affected be wind direction and force). It is “the pilot” who will “put the nose on the wind” for drift compensation.
On ground, the nose will turn slightly into the wind (if the wind comes from the right, the nose will point on the right)
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Basically, in the air your nose will point “nowhere” … a/c will simply drift but heading will remains constant (only the track will be affected be wind direction and force). It is “the pilot” who will “put the nose on the wind” for drift compensation.
On ground, the nose will turn slightly into the wind (if the wind comes from the right, the nose will point on the right)
Yes, I stand corrected…
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Basically, in the air your nose will point “nowhere” … a/c will simply drift but heading will remains constant (only the track will be affected be wind direction and force). It is “the pilot” who will “put the nose on the wind” for drift compensation.
On ground, the nose will turn slightly into the wind (if the wind comes from the right, the nose will point on the right)
I see this is two months old and I go a little bit off-topic but I was searching about this matter and ended up here.
I have noticed in the impossible landing training mission that there is almost none, if any, tendency to veer into the wind while on the ground.
On a conventional aircraft rudder opposite to the wind is needed during the take-off and landing roll, as well as some aileron into the wind to keep the wings level. This is because of the positive directional stability design characteristics.
The F-16 doesn’t exhibit the big vertical fin of lets say an airliner, but anyway I’m surprised of not getting this tendency in Falcon BMS. Coming back to the Impossible Landing scenario, I even find the opposite. I need to step into the wind in order to prevent the plane of veering downwind.
Is this currently simulated in the flight model?
p.s. I saw this in another thread
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On this video you can see the nose still veering into the wind after touchdown.
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@Akbar:
I see this is two months old and I go a little bit off-topic but I was searching about this matter and ended up here.
I have noticed in the impossible landing training mission that there is almost none, if any, tendency to veer into the wind while on the ground.
On a conventional aircraft rudder opposite to the wind is needed during the take-off and landing roll, as well as some aileron into the wind to keep the wings level. This is because of the positive directional stability design characteristics.
The F-16 doesn’t exhibit the big vertical fin of lets say an airliner, but anyway I’m surprised of not getting this tendency in Falcon BMS. Coming back to the Impossible Landing scenario, I even find the opposite. I need to step into the wind in order to prevent the plane of veering downwind.
Is this currently simulated in the flight model?
p.s. I saw this in another thread
as you noticed in your attachment, the AC MAY drift Downwing and MAY veer upwind…so things are not so “easy”
indeed, two opposite forces are acting:
- the WIND is pushing the AC downind which produces a reaction force on the Wheels. The weehls beeing behind GC, the noze is then pushed downind.
- the winf is creating a force on the tail, therefore producing a TORQUE to the WIND
AFAIK the AC IS veering In the wind on the ground, but probably not with NWS on…just put NWS off and check again (NWS hydraulic may be too strong by default ? …)
and yes both those forces / torques are acting in the FM in the same time, which can produce different results depending on wind force and heading, runway conditions and speed / AOA of the AC.
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Hi Mav-jp,
Yes, I actually refer to the NWS off scenario. I first noticed it in the Impossible Landing training mission, just after landing and especially after lowering the nose before engaging NWS and under braking, but happens in all other crosswind scenarios as well, like the (dry) crosswind landing training mission.
It strikes me that there is literally no need to apply downwind rudder in BMS in order to keep the nose from veering into the wind, as, in any conventional aircraft, this is the standard control input (that would mean force 2 in your post [directional stability] stronger than force 1). In the video I posted you can see that this effect seems to be present in the F-16 In BMS I find that even rudder into the wind is needed to keep the centerline, what seems a litle bit odd.
I will try to find some other crosswind HUD tapes.
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Coming back on the subject.
After investigation, there is a bug in the AFM files…
This bug is concerning ONLY the behavior on ground with cross wind and NWS off
For those who want to have a correct wind / ground steering , in the AFM dat file
2.5 # TorqueGearz coefficientshall be set to
1.0 # TorqueGearz coefficient
dont mess with your files unless you are advanced user, again this bug is very minor
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Interesting. Now in looking at other A/C AFM files I see the Mirage is also at a 2.5, the F-18 is at a 2.8 and the A-10 is at a 3.0 for this same setting. Are those aircraft correct and only the F-16 was off?
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Interesting. Now in looking at other A/C AFM files I see the Mirage is also at a 2.5, the F-18 is at a 2.8 and the A-10 is at a 3.0 for this same setting. Are those aircraft correct and only the F-16 was off?
At first sight, All AC concerned though it needs a little bit of testing for other AC than F16
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Coming back on the subject.
After investigation, there is a bug in the AFM files…
This bug is concerning ONLY the behavior on ground with cross wind and NWS off
For those who want to have a correct wind / ground steering , in the AFM dat file
2.5 # TorqueGearz coefficientshall be set to
1.0 # TorqueGearz coefficient
dont mess with your files unless you are advanced user, again this bug is very minor
There’s certainly a few files to change there.