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Support Troubleshooter Known Issues Bug reporting

D series has a massive steering pull. (solved)

Discussion in 'Troubleshooting: Bugs, Questions and Support' started by AllTerrainOutlaw, Jun 8, 2017.

  1. AllTerrainOutlaw

    AllTerrainOutlaw
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    okay before you guys say anything, no it is not torque steer. I tested that with the independent front suspension.

    So, i had tried to build an off-road rig with the live axle suspension with off road parts. and it always seemed to have massive pull even with the steering center set to 0 and toe set to 0. However if i make the center counteracting the pull it still pulls to the left. After extensive experimenting i found that the issue comes from a bad alignment with the front driver side wheel. as seen in the pic below.
    20170607215832_1.jpg

    As u notice the driver side front wheel toe is slightly turned out as the passenger side is straight.
     
    #1 AllTerrainOutlaw, Jun 8, 2017
  2. Rainvest

    Rainvest
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    Mess around with steering center as the default D series with a solid axle has something set to around -32. Or it's just a bug and i'm looking like a complete fool.
     
    #2 Rainvest, Jun 8, 2017
  3. Goosah

    Goosah
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    BeamNG Team

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    Because of the drag link steering design coupled with leaf springs, when the ride height changes, the axle moves straight up and down but the angle of the drag link changes, forcing the steering to the side. You have to tune the steering center for a given ride height. Adjusting steering center is like adjusting the drag link, toe is adjusting the tie rod. Set the toe until both wheels have equal toe readout in the real time alignment data (like 0.3 one side, -0.3 other side) then adjust steering center until the truck cruises straight.

    In reality, if you lift this type of truck without adjusting the drag link, the steering wheel would want to sit off center, but in game, a gamepad or kbd control forces the steering wheel to be centered. With a FFB wheel however, everything reacts exactly as it should.

    Pitman-Knuckle-Draglink.jpg
     
    #3 Goosah, Jun 8, 2017
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    • Informative Informative x 1
  4. firestarspelt

    firestarspelt
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    could you add rack and pinion
     
    #4 firestarspelt, Jun 8, 2017
  5. rocksim

    rocksim
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    Happens to me all the time.
     
    #5 rocksim, Jun 8, 2017
  6. Rainvest

    Rainvest
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    You are ingenious! No more tuning the dumb steering center like that with rack and pinion.
     
    #6 Rainvest, Jun 8, 2017
  7. AllTerrainOutlaw

    AllTerrainOutlaw
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    so i tuned the truck so that i do not notice a pull. im assuming that the initial start off steering pull is torque steer?
     
    #7 AllTerrainOutlaw, Jun 9, 2017
  8. AllTerrainOutlaw

    AllTerrainOutlaw
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    @Goosah so is it normal for the drag link to snap when i floor it then brake. 4wd is engaged.
     
    #8 AllTerrainOutlaw, Jun 12, 2017
  9. Car8john

    Car8john
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    It is?
    Huh
    Odd
     
    #9 Car8john, Jun 12, 2017
  10. Goosah

    Goosah
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    BeamNG Team

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    No oem pickup truck would ever have such an arrangement, because when the axle flexes, it will try to turn the rack around the pinion gear, causing bump steer. It would probably have even worse behavior!

    I could cheat and put the steering hydro on the axle itself, but I'm not going to. It's not realistic. I'd rather the game simulate every vehicle's strengths and weaknesses. In the end, it's more interesting and educational. No other vehicle sim on the market, to my knowledge, approaches the level of detail needed to show these weaknesses in real vehicles, we do and we're proud of it.
     
    #10 Goosah, Jun 12, 2017
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    • Agree Agree x 3
  11. firestarspelt

    firestarspelt
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    well there is aftermarket hydraulic steering
     
    #11 firestarspelt, Jun 12, 2017
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