POSKY B747-400v4 Ground Steering

[Capt.Propwash]

Craft: Project OpenSky - Boeing 747-400 v4 "DreamLiner"
found: http://projectopensky.com/downloads.php ... rthamerica

Direct DL: http://www.projectopensky.com/downloadf ... BOEING.zip

Problem: While on the ground, i have to "bump" my twiststick (Saitek ST-290 Pro) in the direction of travel that I want to go.  Left or Right.  The nose wheel will not go ~60 degrees in either direction and stay there through the turn.  It will go in the direction, then immediately it will go back to being straight forward.   What numbers do I need to change in the AIRCRAFT.cfg to get the nosewheel to turn more and STAY while I hold my "steering/rudder" in the desired direction?


Thanks.

[DaveSims]

Are you sure the yaw damper is off? 

[Capt.Propwash]

positive. AP is never turned on until i hit the runway and am "in position".  Once ATC gives me clearance to take off, "fly runway heading, climb and maintain 5000 feet" , i set Atitude, speed=250kias, +1800 vertical speed, yaw damper OFF.

[Fr. Bill]

Actually, if the AP is on and engaged, you should have the Yaw Damper ON...

...in fact, that's the only time it should be on!  8-)

[HoratioWondersocks]

[quote]Craft: Project OpenSky - Boeing 747-400 v4 "DreamLiner"
found: http://projectopensky.com/downloads.php ... rthamerica

Direct DL: http://www.projectopensky.com/downloadf ... BOEING.zip

Problem: While on the ground, i have to "bump" my twiststick (Saitek ST-290 Pro) in the direction of travel that I want to go.

[Hagar]

[quote][quote]Craft: Project OpenSky - Boeing 747-400 v4 "DreamLiner"
found: http://projectopensky.com/downloads.php ... rthamerica

Direct DL: http://www.projectopensky.com/downloadf ... BOEING.zip

Problem: While on the ground, i have to "bump" my twiststick (Saitek ST-290 Pro) in the direction of travel that I want to go.

[DaveSims]

Yeah, the POSKY team is rather sensitive to criticism and questions.  They do make nice models, just their support could be a little more...supportive.  I have heard of the POSKY 747 having taxi problems, mainly skidding through turns.  I always figured that was a FS fault for large aircraft until I got the RFP 747-200, and it turned perfectly.

[Groundbound1]

Are you using a different panel than what came with the model. The reason I ask is that some of the Posky models need a gauge/gauges to control things like wing flex and gear animations.

i.e:

[VCockpit03]
size_mm=512,512
pixel_size=512,512
texture=$Posky_ACU
background_color=0,0,0
gauge00=Posky744!PkyCALC, 140,80,140,80
gauge01=Posky744!PkyNosegearheight, 140,80,140,80
gauge02=Posky744!PkyBodygearheight, 140,80,140,80
gauge03=Posky744!PkyWinggearheight, 140,80,140,80
gauge04=Posky744!PkyLeftgearboggie, 140,80,140,80
gauge05=Posky744!PkyRightgearboggie, 140,80,140,80
gauge06=Posky744!PkyLeftwgearboggie, 140,80,140,80
gauge07=Posky744!PkyRightwgearboggie, 140,80,140,80
gauge08=Posky744!PkyNosegearsteerling, 140,80,140,80
gauge09=Posky744!PkyWINGROOTFLEX, 140,80,140,80
gauge10=Posky744!PkyRWINGMIDFLEX, 140,80,140,80
gauge11=Posky744!PkyRWINGTIPFLEX, 140,80,140,80
gauge12=Posky744!PkyLWINGMIDFLEX, 140,80,140,80
gauge13=Posky744!PkyLWINGTIPFLEX, 140,80,140,80
gauge14=Posky744!PkyRudder, 140,80,140,80




I discovered that only after installing an addon panel to a cargo version of a 747 model, and the nose wheel was locked at 90 degrees from straight. I added the gauges in question to the addon panel, and the problem was no more.

I don't know if this would cause the problem you're having, but I thought I'd throw it out there.

[HoratioWondersocks]

Just a note to say that i do have quite a few Posky 747s and they DO taxi correctly, so i am sure you will get it sorted.
POSKY=Nice aircraft
BUT rather ferocious staff/developers sometimes.
Andy

[Capt.Propwash]

Are you using a different panel than what came with the model. The reason I ask is that some of the Posky models need a gauge/gauges to control things like wing flex and gear animations.

i.e:

[VCockpit03]
size_mm=512,512
pixel_size=512,512
texture=$Posky_ACU
background_color=0,0,0
gauge00=Posky744!PkyCALC, 140,80,140,80
gauge01=Posky744!PkyNosegearheight, 140,80,140,80
gauge02=Posky744!PkyBodygearheight, 140,80,140,80
gauge03=Posky744!PkyWinggearheight, 140,80,140,80
gauge04=Posky744!PkyLeftgearboggie, 140,80,140,80
gauge05=Posky744!PkyRightgearboggie, 140,80,140,80
gauge06=Posky744!PkyLeftwgearboggie, 140,80,140,80
gauge07=Posky744!PkyRightwgearboggie, 140,80,140,80
gauge08=Posky744!PkyNosegearsteerling, 140,80,140,80
gauge09=Posky744!PkyWINGROOTFLEX, 140,80,140,80
gauge10=Posky744!PkyRWINGMIDFLEX, 140,80,140,80
gauge11=Posky744!PkyRWINGTIPFLEX, 140,80,140,80
gauge12=Posky744!PkyLWINGMIDFLEX, 140,80,140,80
gauge13=Posky744!PkyLWINGTIPFLEX, 140,80,140,80
gauge14=Posky744!PkyRudder, 140,80,140,80




I discovered that only after installing an addon panel to a cargo version of a 747 model, and the nose wheel was locked at 90 degrees from straight. I added the gauges in question to the addon panel, and the problem was no more.

I don't know if this would cause the problem you're having, but I thought I'd throw it out there.

nope. i am using the panel that came with the plane.




[VCockpit03]
size_mm=512,512
pixel_size=512,512
texture=$Posky_ACU
background_color=0,0,0
gauge00=Posky744!PkyCALC, 140,80,140,80
gauge01=Posky744!PkyNosegearheight, 140,80,140,80
gauge02=Posky744!PkyBodygearheight, 140,80,140,80
gauge03=Posky744!PkyWinggearheight, 140,80,140,80
gauge04=Posky744!PkyLeftgearboggie, 140,80,140,80
gauge05=Posky744!PkyRightgearboggie, 140,80,140,80
gauge06=Posky744!PkyLeftwgearboggie, 140,80,140,80
gauge07=Posky744!PkyRightwgearboggie, 140,80,140,80
gauge08=Posky744!PkyNosegearsteerling, 140,80,140,80
gauge09=Posky744!PkyWINGROOTFLEX, 140,80,140,80
gauge10=Posky744!PkyRWINGMIDFLEX, 140,80,140,80
gauge11=Posky744!PkyRWINGTIPFLEX, 140,80,140,80
gauge12=Posky744!PkyLWINGMIDFLEX, 140,80,140,80
gauge13=Posky744!PkyLWINGTIPFLEX, 140,80,140,80
gauge14=Posky744!PkyRudder, 140,80,140,80


I thought there was another set of numbers somewhere like in the aircraft.cfg that controls the nosewheel steering angle.  Maybe the angle is off and that is why I am having to "bump" the gear in order to even turn; that is unless i decide to use Differential Breaks along with engine power to create the turn.  (toe break left, and run up engines 3 and 4 to bring it around .... vice versa to go to the right)

[Opa]

You might check the [contact_points] section the in aircraft.cfg file and experiment with some number changes - especially number 7.

This is a list of what each area means:

0 Class
1 Longitudinal Position (feet)
2 Lateral Position (feet)
3 Vertical Position (feet)
4 Impact Damage Threshold (Feet Per Minute)
5 Brake Map (0=None, 1=Left, 2=Right)
6 Wheel Radius (feet)
7 Steer Angle (degrees)
8 Static Compression (feet) (0 if rigid)
9 Max/Static Compression Ratio
10 Damping Ratio (0=Undamped, 1=Critically Damped)
11 Extension Time (seconds)
12 Retraction Time (seconds)
13 Sound Type
14 Airspeed limit for retraction (KIAS)
15 Airspeed that gear gets damage at (KIAS)

Good Luck!

PS - This tread may be of help - particularly the comments by John Hinson. Be sure to read the entire thread.

http://forums.flightsim.com/vbfs/showth ... t=steering

[1olehippy]

I've had ground handling problems with several different aircraft.  I find the easiest fix is in the aircraft cfg file.  Go to [brakes] & add the entry "differential_braking_scale = 1.0" that should solve a lot of troubles.

[krusbullen]

I have a similar problem. The nosegear turn but the aircraft just slides forvard and turn very slow. It goes more straight forward then turn. I have many Posky 747 and i have just noticed this on the JAL 747 400 freighter and the Emirates Sky cargo 747. The other works just fine.

I don