Drag

[Rogue]

Is it my imagination that trucks in ATS have no drag?
They seem to be too free wheeling, even while hauling a heavy load.
There should be more drag if you let up on the gas, even on a level road.
The wind creates drag, the tires create drag, and the engine/♥♥♥♥♥♥ creates drag and the load creates drag.
It takes forever to slow down with out braking, even if you gear down.
imo

[Jackrabbit_V6/ RSProduxx]

it has more than ETS2 tbh... that one has literally none :)
but yes, i think deceleration just by the drivetrain should be looked at by SCS for sure... it´s just too weak

[room217au]

Originally posted by RoadHog:

The wind creates drag, the tires create drag, and the engine/♥♥♥♥♥♥ creates drag and the load creates drag.

There is wind resistance factor in the physics config but it seems that's only to inhibit acceleration - as if to give the impression that you're actually pushing into the wind. This factor is not influenced in any way by aero kits, cabin shape or dimensions of the truck.
The latest beta has changed code included that has increased the drivetrain load under deceleration, but to be honest I can't see or feel a difference.

Originally posted by RoadHog:

It takes forever to slow down with out braking, even if you gear down

Exhaust brake.
Trailer brake.
Engine brake.
Retarder.
My oldest boss always said "Gears to go. Brakes to slow". It's long been taught in my country that shuffling down through gears to decelerate is not only an increase in driver workload but also extra wear and tear on parts.

I wrote a mod that replaces the standard retarder sound with a big fat and loud engine brake - like the one in a Cummins engine. In ETS2 and ATS there is a delay between activation of an engine brake and the effect on the truck. The retarder has up to 5 levels of rsistance and it actuates immediately .. but mine SOUNDS like a cracklin' Jacob brake about to crush your vehicle with sheer noise.

[Airborne Trooper]

Extremely poor physics modelling in the game engine. Its really that simple. The model they use has no relationship with reality. They do a good job hiding this fact though which makes the game fun, for awhile.

My impression is that SCS was a group of pretty good 3d modellers that decided to make a "game".