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Thread: GS 4 seats

  1. #1
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    GS 4 seats

    So...I'm getting ready to put in a SimXperience order and I run across GS 4 seats.

    From the reviews I've been able to dig up the seat might even be better than a motion rig at half the cost. The sense I've gotten is the GS 4 and a standard motion system (like a SX Stage 1) is really the way to go. The seat is best for cornering/acceleration/braking (the more sustained forces) and the rig is best for bumps and road feel. SimXperience apparently contracted with the guy who makes/made the GS 4 and offered them for a while. Then they stopped offering the seats and put him to work on the new AccuForce wheel. There MAY be another seat offered in the future.

    Does anyone have any experience with the GS 4 that could add something here? Anybody got one to sell?? I found Bergisons GS4 homemade clone and it looks like I might have to look into making my own (not out of wood, of course). BTW the seat belt tension addition looks really good.

    So...there goes my 'plug and play' plan, as it looks like I could be spending a good part of my winter fabricating and wiring a seat. I would really have to read up on control circuits, unless someone here has done one and could tutor me. Or maybe I could find a sympathetic soul at X-Sim to help.

    My question for this post (aside from 'Where can I get a seat?') is: When SX was offering them there were modules in the SimCommander software for the seat. They say, if you have a seat, they still provide support but if I buy a current package and add a seat of my own will the current SimCommander software handle it? I'm assuming it's versatile enough that even if they don't provide a specific seat module it can be 'told' to control the Stage 1 AND a seat. Does anybody know?

    P.S. The guy who made the GS 4 seats was not very far from where I live. Just my luck/timing. Drats!

    Thanks.

  2. #2
    Junior Member
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    spain
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    Gs4 costs 3000 usd aprox
    Universal motion base + 2actuators costed me arroun 1500 usd.

    Gs4 is discontinued production

  3. #3
    Senior Member
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    May 2012
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    only my opinion but I'd stay clear of the seat, it uses low grade actuators that are also know to break
    ( although fairly inexpensive to replace)

    the seat rocker type setups are great + consider using a racing harness tethered to a spring mech
    ( to apply tension to body during breaking and cornering etc )
    [SIZE=5][/SIZE

  4. #4
    Quote Originally Posted by Adrianstealth View Post
    only my opinion but I'd stay clear of the seat, it uses low grade actuators that are also know to break
    ( although fairly inexpensive to replace)

    the seat rocker type setups are great + consider using a racing harness tethered to a spring mech
    ( to apply tension to body during breaking and cornering etc )
    I probably know how to do for Braking (relatively easy)... do you know how to implement for Cornering? This could be my next DIY project if I ever have time.

  5. #5
    Senior Member
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    It's my next project too

    I hope to get some cornering effect by routing the ends of the harness close to the rear centre of my rig
    Will test & adjust -may use bungee strap cord ( the common type with hooks on end although I intend to get them stitched with adjustable fanseners etc) should work to some degree
    [SIZE=5][/SIZE

  6. #6
    Quote Originally Posted by Adrianstealth View Post
    It's my next project too

    I hope to get some cornering effect by routing the ends of the harness close to the rear centre of my rig
    Will test & adjust -may use bungee strap cord ( the common type with hooks on end although I intend to get them stitched with adjustable fanseners etc) should work to some degree
    Let me know if you figure out how to do for the "cornering". Actually, I felt the cornering g-effect is good enough for me, once I turned up the lateral-g strength over 200%. I am pretty happy on that. The issue I have for the braking g-effect.
    Here is the CXC solution by adding single connect point with strong springs for tension:




    Attachment 18714Attachment 18715

    I think I may need to change my springs, tight into single point, and adjust the length accordingly:


    Attachment 18716

  7. #7
    Senior Member
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    yes nice find, they are doing something similar

    I don't really want anything else plugged into my PC, so this method I think would be best

    I assume springs may be a bit clunky ( when no one sitting in seat) so this is why I'm steering towards bungee cord with some time of plastic cord clamp ( so they can be adjusted so everything just right )
    [SIZE=5][/SIZE

  8. #8
    Quote Originally Posted by Adrianstealth View Post

    I assume springs may be a bit clunky ( when no one sitting in seat) so this is why I'm steering towards bungee cord with some time of plastic cord clamp ( so they can be adjusted so everything just right )
    Yes, need strong spring and not too tighten the belt. In worst case, I calculate as following. Say max braking at 5g (F1 car). Assuming upbody mas is half of your body, that give brake g force is 2.5g.
    To feel the 2.5g force on the seat belt, you need tighten belt. For my 150mm actuators, say max movement from mid point ~ 70mm (0.07m) so the springs travel distance would be 0.07m.

    F= - k x distance that leads: 2.5g = -k x 0.07 so k = 350 N/m or 700 lb/in. For three springs, with each would be with k = 233 lb/in. Now, this is worst case, basically I tighten up the belt and choking to "death". In reality, I cannot tighten belt like this, so I need to leave room for. So the spring travel distance would be far less than 70mm. Lets say half of 70mm, 35mm. I need three springs with each at least k= 2x233 = 466 lb/in spring. I will shop for those springs.

  9. #9
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    it depends how much motion you have set in your motion profile(s)

    ideally I imagine fastening race harness under light tension ( bit of stretch in cord or Spring ) then that increases noticable as body moves forward brake , decreases for body moving back ( accelerate ) , hopefully sideways too

    how long/tension of the cord + setting must work together - I'll keep same motion profiles and setup to that, I imagine it's tinkering + trial & error that will get good results I'd not bother trying to work it out on paper
    [SIZE=5][/SIZE

  10. #10
    Quote Originally Posted by Greg23 View Post
    My question for this post (aside from 'Where can I get a seat?') is: When SX was offering them there were modules in the SimCommander software for the seat. They say, if you have a seat, they still provide support but if I buy a current package and add a seat of my own will the current SimCommander software handle it? I'm assuming it's versatile enough that even if they don't provide a specific seat module it can be 'told' to control the Stage 1 AND a seat. Does anybody know?

    P.S. The guy who made the GS 4 seats was not very far from where I live. Just my luck/timing. Drats!

    Thanks.
    As I recalled that I read somewhere the sim-x products lisence key is transferable.
    If the original owner bought from Sim-x, then you are OK. If not, you may need to contact sim-x first before buying.

    Quote Originally Posted by Adrianstealth View Post
    it depends how much motion you have set in your motion profile(s)

    ideally I imagine fastening race harness under light tension ( bit of stretch in cord or Spring ) then that increases noticable as body moves forward brake , decreases for body moving back ( accelerate ) , hopefully sideways too

    how long/tension of the cord + setting must work together - I'll keep same motion profiles and setup to that, I imagine it's tinkering + trial & error that will get good results I'd not bother trying to work it out on paper

    I just realized that my SCN5 may not have enough torque to work with those springs. The F1 max braking force just too much for me anyhow. I probably need 1/3 of that at most.

    As you said, trial-error-feel method is the way to go....I will get a few sets of different springs to try.

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