Gavril T75

Test it with Reduced Tyre Friction because your suppose to get catastrophic understeer in a truck doing 60mph...I guess more trucks are set up that way..

 

I agree - the truck should initially understeer, assuming there is no prior swaying motion. However, I would expect it to tip over if you manage to induce significant oversteer, ie. if the truck's slip angle exceeds 70 degrees or so.

It may also be possible to completely spin out (> 180 degrees) and avoid tipping over if the rate of spin is high enough to give the truck gyroscopic stability.

 

I didn't see any attempt to jackknife the truck in the video either. Maybe they were trying to give an example of a proper stopping distance..?

 

Her are some crash tests

 

Truck mass center is pretty low to comparing how high they are.
But still, if truck is traveling 60mph and you turn wheel to dead end, i think than it will flip over in real life.
In here, if truck has been on accident without other vehicle, it has been fall over it side to taking corner too fast speed.
In semi trucks it is load of cargo what usually flip the trucks, but truck itself probably will flip too without trailer, i`m not sure, haven`t never seen flipped semi truck without trailer

Edit. When you whats that second clip, it look like truck is nearly to flip itself, but trailer take care of it and flip the truck over.
Still trying to find video where just truck without trailer fall sideways.





- - - Updated - - -

Great video to rollovers:

 

I agree with your logic...it has to do with the centre of mass and centre of gravity doesnt it...but you do make a good point for it..

 

Yeah a semi will flipp even without a trailer if u take a corner too hard. A little bit of skid and then flip. There aren't race cars meant to take a corner aggressively. I think a f coef of 1.25 might sound suitable according to what you've said Gabe.

What's the weight balance on the truck right now? Like how heavy Is the front half compared to the rear half?

 

The only reason they are flipping is because they are hauling a loaded trailer. Look at how high the center of mass is on a trailer. Bob tailing I don't think it would flip unless you were going pretty damn fast. Like 75, 80kmh. It takes so damn long to get to full lock I don't think it would understeer all that much haha. I used to drive a Sterling Acterra 5 ton with a 24' cube on it, and I've pushed it around corners at like 65-70kmh to the point a buzzer came on and a light on the dash lit up, it felt like it was getting light on the inside tires lmao. But that was only because it had a cube van that's like 8.5 feet tall and weighs probably as much as a small car.

 

Dont trucks usually have softer suspension or something so that the tractor unit does not shake the trailer unit to bits? I am just asking...okay..

 

Think for a sec. How does the weight get supported above the wheels then. They do have air bags for shock absorption on the rear axles (some older trucks just have shocks) which helps a bit. But generally no, the suspension in any commercial vehicle used to haul anything is going to be stiffer to compensate for the weight. Generally though I found that its only really bad when your empty or bob tailing, they ride pretty good with weight on them.

 

Didnt think about that...I didnt think it would be something like that I mean that tractor unit has to weigh in at 15,000lbs minimum and it would need hard suspension...

 

I road in a 90s semi with no trailer. Was a very stiff ride. Almost as stiff feeling as a civic si lol

 

Question to the people that know...what sort of suspension setup should Gabester build for this truck....

 

Omg that's awesome man!! When will we get to see a sneak peak of the interior? Looks gorgeous man what's the total weight it's came to be? And possibly what's the performance figures?

 

Will there Be new Cabs, Amber lights, And Shorter/ Longer Chassis?