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matta757

Aircraft ground steering

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Hi,I need some help with steering. When I taxi (using my joystick only for ground steering, I fly with a yoke) in some planes I absolutely have the most difficult time steering and making corners and I usually end up in the grass. It's especially bad with the POSKY 767's. Anyone know how I can fix this? Is there something in the aircraft.cfg that I can edit?Any help is greatly appreciated!Thanks,Matt

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Hi Matt,Not sure if you've done the following.1. Calibrate your Joystick.2. Increase the joystick

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Hi Mike; wouldn't increasing the sensitivity excerbate the problem?

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I would like to see a good description of how ground steering is implemented in the sim. At least for the big iron with nose wheel steering, it doesn't appear that the aircraft tracks the nose wheel; rather it seems to rotate around the CG or ref point. It's hard to tell for sure.scott s..

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I have just started using the FSUIPC feature for mapping and calibrating joy sticks. I find that using it provides more joy stick accuracy all around. FSUIPC also provides a steering tiller feature (as you would find in the bigger birds) that provides even greater taxing control in my opinion.

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the problem with the Posky 767 (and all of their latest releases) is the FDE, the FDE designer still believes one can translate the heavy feeling an commercial airliner has to FS via his FDE's, so you find extremely low sensitivity values in the flight tuning section of the aircraft.cfg.I can't really help you with this issue tough,I stopped editing Posky FDE's a while ago, it's just too much work :)

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A good example would be the LevelD, PMDG and SSTSIM, which have correct pivot points for turning on the ground.

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Hi there,I don't know much about pivot pionts but when it concernes ground steering sensitivity, this can be altered in the aircraft.cfg file. However, change the values only for those aircraft which have this taxi sensitivity problem. In the aircraft.cfg file concerned go to the section [Contact_points].The first line (= nose gear properties) should be "point.0=" etc.The next figures after the 7th comma in that line denote the maximum nose wheel steering angle. Reduce this angle to about 35.00 or even less.Take heed however, because in some aircraft the nose gear has double wheels. Only if the next line: "point.1=" had almost all of it's values the same as "point.0=", then also alter the steering angle in that line to the same value as you have done in "point.0=".That should solve your ground steering problems !!Please also take into account that if you ever substitute your joystick for another or e.g. a yolk (or visa versa) then it may be necessary to alter these steering angle values again.Good luck.Hans

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Is your joystick a fairly basic one because if it is you want one with a handle that twists which makes taxxing much easier.Although there are ome planes ie DC3 that can be quite tricky even with a twistable(not sure how you describe this function)joystick.cheers Andy

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Oops ! Something went wrong here."In the aircraft.cfg file concerned go to the section ."The section should be: "Contact Points".Hans

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Hey guys,Thanks for all the suggestions... I tried differential braking, which until now I didn't even know what it was, and that made ALL the difference!Thanks,Matt

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>I would like to see a good description of how ground steering>is implemented in the sim. At least for the big iron with>nose wheel steering, it doesn't appear that the aircraft>tracks the nose wheel; rather it seems to rotate around the CG>or ref point. It's hard to tell for sure.>>scott s.>.>For the ones with tricycle landing gear that would be appropriate.

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Hi!Isn't it so that FS does not really have the ground behaviour of a tire simulated.FS just increases the rudder effectivity extremly on ground to move the nose left or right.But it has nothing to do with the tires and some points in the aircraft config.Ground behaviour is something really missing in FS.Antoher example is the extreme skid you get when doing an crosswind landing.So ground in FS is, as far as i know, just a different but also "in air" behaivour. But i am not a FDE expert.Florian

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Florian, you may be correct in what you say but if your problem is a too great steering sensitivity during taxiing, take offs and landings, then altering the maximum steering angle in the aircraft.cfg, as I have posted above, is definitely one of the best solutions.However, in general and with the heavier non GA aircraft types, my long FS experience tells me that nose wheel(s) skidding in (tight) corners or when landing with cross winds, is primarily caused by the weight on the nose wheel(s) being too light. Moving the contact points of the main gear a few feet towards the tail, usually solves this problem and will not influence the flight characteristics. Trial and error is the credo here but always back up your aircraft.cfg first.I cannot directly relate the above to something missing in an FS ground behavior functionality or it being technically performed in another way but moving the main gear contact points do certainly influence it.RegardsHans

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Hi!Okay seems you are fully right, as i said i am gauge porgrammer and have hardly no idea about all the FDE stuff.Maybe i have wrongly connected the original thread problem with the fs ground behaviour...regardsflorian

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