[GUIDE] [1.19.2.1] Vehicle physics explained.

[Cadde]

Angle is how far something can turn/twist. So higher values means more movement and lower means less movement.
With less movement, you might also need to adjust springiness and dampening values as it could turn into ping-pong otherwise.

[BackToB]

Firstly: Thank you Cadde for this useful thread.

I am currently struggling with the maneuvrability of a downloaded mod truck, DAF XF Crawler (by mogome, Yuri Shitov, vovangt4).
After managing to get it working in ETS 2 I bumped into the ugly fact that the truck becomes hard to steer when attached to a loaded truck
while when the owned truck is not loaded I don't have this unsteerable artifact . I tried fiddling with the chassis data (8x8.sii) but so far no luck.
Can somebody point out to a solution?
Thank you all in advance.

BTW chassis data:

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SiiNunit
{
accessory_chassis_data : 8x8.daf.xf.crawler.chassis
{
	name: "@@chassis@@ 8x8"
	price: 38540
	unlock: 0
	info[]: "8x8"
	info[]: "1800 @@unit_l@@"
        detail_model: "/vehicle/truck/daf_xf/truck_crawler.pmd"
	model: "/vehicle/truck/daf_xf/truck_crawler.pmd"
	lods[]: "/vehicle/truck/daf_xf/crawler_02.pmd"
	lods[]: "/vehicle/truck/daf_xf/crawler_03.pmd"
	collision: "/vehicle/truck/daf_xf/truck_crawler.pmc"

	residual_travel[]: 0.12
	residual_travel[]: 0.12
	residual_travel[]: 0.12
	residual_travel[]: 0.12

	icon: "chassis_daf_xf_8x2"
	tank_size: 1800
	variant: crawler_8x8
	look: default
	defaults[]: "/def/vehicle/truck/daf.xf.crawler/paint_job/daf_cat.sii"
	defaults[]: "/def/vehicle/truck/daf.xf.crawler/engine/mx300.sii"
	extended_shadow_texture: "/vehicle/truck/daf_xf/shadow_8x8.tobj"
	extended_shadow_intensity: 0.97
	extended_shadow_fadeout_start: 10
	extended_shadow_fadeout_length: 0
	ui_shadow: "/vehicle/truck/daf_xf/ui_shadow_8x8.pmd"
	
	powered_axle[0]: true	# front axle
	powered_axle[1]: true	# front axle
	powered_axle[2]: true	# rear axle
	powered_axle[3]: true	# rear axle
		
	kerb_weight[0]:	5100.1
	kerb_weight[1]:	1350.1
	kerb_weight[2]:	2350.1
	kerb_weight[3]:	2350.1
        
        liftable_axle[0]: false
	liftable_axle[1]: false
	liftable_axle[2]: true
        liftable_axle[3]: true
}
}

UPDATE and SOLUTION:

The author/converter forgot to add these lines:

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	steerable_axle[0]: true
	steerable_axle[1]: true
	steerable_axle[2]: false
	steerable_axle[3]: false

Now the crawler is completely manouvrable and does steer as expected.

Hope someone else has some use of this info.

[mgysgtdev]

Could someone explain this?

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steering_ratio_coef:    0.95                        // Default: 0.95,   Defines upper limit of result coefficient (ratio against player).

I can't seem to understand it

[Cadde]

It means that's the upper limit of how fast the wheel will auto center. If that value was equal to 1.0, you wouldn't be able to overcome the auto centering of the wheel at speed.
The faster you go, the closer to that value you get.

[mgysgtdev]

thnx for the info so increasing the value will increase the auto centering force at speed? i have a real DAF wheel and those are pretty heavy so the FFB auto centering at speed won't move my wheel to center