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Gavril T75

Discussion in 'Official Content' started by gabester, Sep 11, 2013.

  1. JDMClark

    JDMClark
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    Is it stable at those speeds? Or is it a little wavy.. Some mods with a lot of weight tend to not handle well. And 7 tons moving that fast would decimate something. Does the game handle its weight good? Had some issues with drowsys 6 ton truck where it would crash sometimes or the physics would get buggy
     
  2. Wheelie

    Wheelie
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    Would you say this is the only remaining factor before the race update (besides the GUI), or are there other things that are still on the to-do list?
     
  3. JDMClark

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    This is a bit of a stupid idea but I think it would be awesome.. Maybe like a progress/% bar on the main page showing how far you guys are into the next update. That would much better illustrate the position of the development to me.. But I don't think you guys would like that idea. Lol
     
  4. gabester

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    Very stable at high speed :) It handles really well, actually.

    Oh no, there's a massive amount of codework that still needs to be done (and I'm not a programmer). If the T75 being finished coincides with the codework needed for the race update, then it'll be included... otherwise it won't be released until it's done.
     
  5. JDMClark

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    One more question and I'll shut up.. For now.. Does the cabin flex and move some? Like an air ride or something? Like [insert video here] when semi's go over big bumps the cabin rocks back and forth.

    On phone can't post video but here's an example of what I'm saying.

    https://www.youtube.com/watch?v=JpQ6-oQcU9Q&feature=youtube_gdata_player
     
    #345 JDMClark, Jan 24, 2014
    Last edited: Jan 24, 2014
  6. gabester

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    It's got soft rubber mounts, so it does flex a little, but no, it's not air ride. You can rip the cab off the frame completely though :)
     
  7. JDMClark

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    Alright cool! Sounds like its going to be fun Gabe thanks for the hard work!
     
  8. Deleted member 31346234

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    Gonna enjoy this!! Thanks alot Gabester!!!;)
     
  9. JDMClark

    JDMClark
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  10. moosedks

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    yeah I think the point of exhausts like that is to put the smoke and soot over top the trailer. Gabe's would either get the trailer really dirty all the time or shoot smoke into the lane beside it.
     
  11. Bigrigger

    Bigrigger
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    This rig looks amazing, Gabester! If I needed a reason to buy BeamNG Drive, this would be it!:D Keep up the great work; very accurate and detailed, true-to-life vehicles, as always! Can't wait for the release!
     
  12. Ferrari

    Ferrari
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    Trailers? :)
     
  13. SixSixSevenSeven

    SixSixSevenSeven
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    Already been asked and discussed.
     
  14. jeffbox

    jeffbox
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    I don't know how i found this video, but is awesome.

     
    #354 jeffbox, Jan 26, 2014
    Last edited by a moderator: Oct 21, 2015
  15. Silent_alarm

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    I've never seen leafsprings and air bellows on the same axle to compensate for reid height sag. Oh, never seen but if i remember correclty, Tatra trucks have air and leafsprings on same axle if chosen from options list. But it's totally different style suspension anyways...

    The ALB (Load sensing brake pressure regulator) valve operates either via ride height sag or air bellow pressure

    -Leafsprings have more sag more when there is more weight. The valve is bolted to the mainframe and actuator beam is connected to the axle (or other way round, depending on manufacturer). More weight results in lower rideheight that makes the axle positioning closer to the frame, thus making the actuator beam push a lever on the valve and adjusting brake pressure.

    -A certain amount of air pressure is required in the air bellow for the ride to maintain the same height under the load or unloaded. In example rear axle ride height is set to be 60cm from bottom of the chassis to the ground unloaded and for achieving the required height 6 bar pressure in the air bellows is required. But under full load the bellows have 10 bar air pressure to maintain the 60cm height.

    Older trucks don't have these but these days it's legal requirement to be in newer trucks atleast here in europe. From early 90's atleast. When they came it was a huge fuzz because truckers weren't used to have these. They resulted in need of more force on brakepedal when unloaded even though the charasteristics remained the same under the load. Without the ALB valve it was really, really easy to lock wheels when unloaded. Vehicle equipped with ALB is intented to have same braking and brake pedal charasteristics on all possible load situations, nose heavy, tail heavy, evenly loaded, partially loaded, fully loaded or unloaded.


    And even my ex- Citroën ZX wagon had one on rear axle. If it got stuck to the loaded position it was really tailhappy while braking unloaded.

    EDIT: And since the discussion for flipping the semi is underway, usually the truck or truck with empty trailer doesn't flip over since the CG is pretty low, but it's the loaded trailer that causes the whole semi combo to flip over because load usually rises the CG. The same applys to dolly combo. Usually its either the truck or the wagon that flips over unless they haul exactly same kind of gargo when it's possible that you can flip both simultaneously. And if you want to have the most nerve wrecking cargo, it's partially filled ICB's from top to bottom. Those things are a disaster waiting to happen since the weight moves around like crazy and even causes huge forces that really test how well you have secured the load. And to make things even harder for modeling, single and double wheels have different kind of tolerance and behaviour towards sideway G's. Singles behave a bit smoother on the edge of the grip whereas doubles tend to grip more but when it breaks the grip the grip curve has more aggressive drop and the higher G's result in faster snap movement. And single wheels tend to bend more under the weight that makes it a bit easyer to flip over.
     
    #355 Silent_alarm, Jan 26, 2014
    Last edited: Jan 26, 2014
  16. rsb0204

    rsb0204
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    What do you mean? the T75 appears the same suspension setup as my rig.
    article3-image1_WxH_Torn.jpg

    Naw, hanging meat (like whole cow) is worse. no way to secure it, and all the weights up high.
     
  17. Silent_alarm

    Silent_alarm
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    That hanging meat thing would be illegal in Finland atleast :D (afaik)

    Even though that's a leafspring holding the axle on place, the suspension in picture is 2-link suspension. (Although usually trucks (and everything else link suspended have atleast 4 link so that the axle stays where it should) IT IS NOT A LEAFSPRING SUSPENSION that has airbellows for COMPENSATING spring sag. Even though there is half a leafspring holding the axle located, the springs are just holding the axle on place, acting as links and the axle is too close to the air bellows for the spring to really flex to be noticeable. You could change the leafspring to solid steel bar with similiar installing points and it wouldn't matter. Only reason for leafspring use at that point is better handling of vibration and sudden impact since the steel has spring quality. Solid hard steel would probably get tired of the vibration and snap when old. If you'd let all the air out of those bellows it would drop to bottom.

    Now THIS IS LEAFSPRING SUSPENSION WITH AIRBELLOW COMPENSATING (the double axles set)
    http://static.petrisimolin.com/gallery/data/images/sisua45-Hnaci_trakt-v.jpg

    Notice the driveaxles on both ends of leafsprings and airbellows on top of axles. The bellows are empty when truck is unloaded.

    That one is made by Tatra.


    And THIS IS LEAFSPRING SUSPENSION ON DOUBLE AXLES
    http://www.dendoff.com/pix/leafbig.jpg

    Notice the axles on both ends of leafsprings.

    And THIS IS LEAFSPRING SUSPENSION ON SINGLE AXLE
    http://i01.i.aliimg.com/photo/v1/133778339/Leaf_Spring_Suspension_Axle.jpg


    Hope this clarifys something ;)
     
  18. rsb0204

    rsb0204
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    I know what a leaf sping is lol. in your last post you said:
    i thought you thought the T75 had leafs, from all the pictures ive seen it seems to have a suspension like the one on my cascadia. thats why i posted the picture, so i wouldent have to explain what a 2 link is.

    they finaly illegalized hauling hanging meat here last year i think. now we haul tubs. but it was one of those things you dont forget. scary.
     
  19. Silent_alarm

    Silent_alarm
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    Yeah this was probably mostly just a case of "potato potato" :D

    Although i'm not sure does the Gavril T75 rear suspension count as leaf spring suspension technically/leagally since the leaf isn't the main suspension element (IMHO). But then few last post were pretty much infoblasting for some people outside the profession x)

    One thing i'd like to know is what kind of 13 speed we're getting. Is it synchronised or not and does it handle in game like a real one if it's unsynchronised. Because i really like the Fuller gearbox IRL, clutchsless shifting ability is something that i'd like to see, even though it's not recommended IRL by Eaton. But it makes all the difference in the right job. And above all, IRL like gearbox pattern! It's usually very overlooked point in driving games these days but i'd like to have vehicle specific gearbox patterns. Some cars have the pattern "upside-down" and so on.

    Actually i'm gonna use the search first and see if that has been suggested. If not, i'm suggesting it. We're gonna see real life based mods anyhow and even Scania and Volvo 12+r(+c) have different kind of gearbox patterns. BMW used to have 5 speed box in roadcars where 1st gear was located on down left (http://img.tarad.com/shop/a/autopartsprofessionalonline/img-lib/spd_2009010810021_b.jpg) and my dad told that in "jokamiesluokka" rallying (http://en.wikipedia.org/wiki/Folkrace) they used to modify some specific 4spd gearbox so that they replaced only the 1st gear so that it became more like 2½ because the modified engines had enough grunt to make the original 1st gear obsolete since they could launch on 2nd, but the gap between 2nd and 3rd was a bit too big. So the pattern went like this, left down (originally 2nd), left up (original 1st modified to 2½), right up (original 3rd, and right down (original 4th).
     
  20. rsb0204

    rsb0204
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    i belive gabe said this rig is getting a 15 speed. im an eaton man myself but i prefer thier 10 speeds. i float gears as well, cant double clutch only have 1 knee cap lol. im with you on the shift paterns, i know its kinda knit picky but it adds alot to a vehicle if its right. personaly i wouldent mind seeing a duplex...

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