1. Do not share user accounts! Any account that is shared by another person will be blocked and closed. This means: we will close not only the account that is shared, but also the main account of the user who uses another person's account. We have the ability to detect account sharing, so please do not try to cheat the system. This action will take place on 04/18/2023. Read all forum rules.
    Dismiss Notice
  2. For downloading SimTools plugins you need a Download Package. Get it with virtual coins that you receive for forum activity or Buy Download Package - We have a zero Spam tolerance so read our forum rules first.

    Buy Now a Download Plan!
  3. Do not try to cheat our system and do not post an unnecessary amount of useless posts only to earn credits here. We have a zero spam tolerance policy and this will cause a ban of your user account. Otherwise we wish you a pleasant stay here! Read the forum rules
  4. We have a few rules which you need to read and accept before posting anything here! Following these rules will keep the forum clean and your stay pleasant. Do not follow these rules can lead to permanent exclusion from this website: Read the forum rules.
    Are you a company? Read our company rules

Question Seat harness

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

  1. frogger

    frogger New Member

    Joined:
    Mar 22, 2009
    Messages:
    5
    Occupation:
    retail
    Location:
    Geraldton Western Australia
    Balance:
    88Coins
    Ratings:
    +1 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    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 Well-Known Member Gold Contributor

    Joined:
    Jun 30, 2015
    Messages:
    552
    Location:
    Germany
    Balance:
    4,212Coins
    Ratings:
    +594 / 2 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino, Motion platform
    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

    Joined:
    Mar 22, 2009
    Messages:
    5
    Occupation:
    retail
    Location:
    Geraldton Western Australia
    Balance:
    88Coins
    Ratings:
    +1 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    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 Well-Known Member Gold Contributor

    Joined:
    Jun 30, 2015
    Messages:
    552
    Location:
    Germany
    Balance:
    4,212Coins
    Ratings:
    +594 / 2 / -0
    My Motion Simulator:
    2DOF, 3DOF, DC motor, Arduino, Motion platform
    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

    Joined:
    Mar 22, 2009
    Messages:
    5
    Occupation:
    retail
    Location:
    Geraldton Western Australia
    Balance:
    88Coins
    Ratings:
    +1 / 0 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    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.
    • Like Like x 1