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Question Seat harness

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by frogger, Mar 7, 2019.

  1. frogger

    frogger New Member

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    hi all new here and slowly trying to learn the ropes. to start with im thinking i want to just have a harness that tensions as i pull positive Geforce in DCS world while using VR,

    i had 2 ideas in mind 1 is 2 loops that u wear like a back pack and the other is just 1 strap that goes across your chest. im wondering if a wiper motor is to powerful for this type of concept and would cause injury from to much pressure. sorry if its a silly question and i appreciate any help.
  2. MarkusB

    MarkusB Active Member Gold Contributor

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    A harness tensioner is a great idea, and wiper motors are definitely not too strong. You need to configure the movement range of the motors anyway. (I am using wheelchair motors for my harness tensioner, which are much stronger than wiper motors.)

    A good approach is to use a regular car harness. Generally recommended in this forum are 5-point harnesses, because they allow maximizing the "pull" effect since they have a fix point between your legs.
    I am using a 3-point harness simply because it is easier to close than the 5-point harness I tested before. But that's personal taste.

    BUT: If I understand you correctly, you want the tensioner to pull your torso backwards when the plane accelerates, so that you feel the forward acceleration. Is this correct?
    This will definitely not cause the desired effect. Your main sensation will not be the pressure of your torso against the backrest (which is the case with "real" accelerations). Instead you will feel the pressure of the belts against your body, which causes the opposite effect: In fact, harness tensioners are commonly used for simulating negative accelerations (i. e. braking). For forward acceleration, g-seat paddles are much better suited.
    • Agree Agree x 1
  3. frogger

    frogger New Member

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    Thats correct, acceleration and geforce pushing your body into the seat. i do see what you mean though about the opposite effect.
  4. MarkusB

    MarkusB Active Member Gold Contributor

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    It is possible to achieve what you have in mind: Let the motors pull your torso into the same direction as the real g-forces (surge and sway) would. But this is not possible with belts around your torso, because you will feel the belts themselves more than the movement of your body. I know because i tried.
    @SeatTime has found a solution that seems to work great, see the last couple of pictures here.
    Based on his idea and after multiple unsuccessful attempts with belts I also built such a kind of g-vest, see here. It also worked quite well, but I returned to a "traditional" harness tensioner and g-seat because putting on the g-vest was too cumbersome.
  5. frogger

    frogger New Member

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    thats a really cool idea thanks for the info , i should add while the harness idea is not so realistic its more to allow me to learn how the software and hardware work. i figured i could get started with the bare minimum that i already have , 1 motor a H bridge and an arduino board. my main goal is to have a G seat with paddles but i want to make sure i can understand the process first as im abit dyslexic and it takes me awhile to get through the manuals. again thanks for the good info it helps alot.
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