Oh no! A Carminite Ghastguard steal your locomotives' power.
Hence your acceleration is limited. This mod provide a more smooth startup of your locomotives and stocks.
Enjoy your game.
Drag the jar file as you install mod normally. And acceleration your locomotives will be limited.
Immersive Railroading provides a immersive physical system as its name shows. The total acceleration of stocks as following shows:
$Total_acceleration=Tractive_Acceleration+Resistance_Acceleration+Grade_Acceleration+Airbrake_Acceleration$
,where $Tractive_Acceleration$ is Tractive effort by your locomotives, $Resistance_Acceleration$ is the resistance, include friction, etc. $Grade_Acceleration$ is the acceleration due to gravity if the stocks are in a slope. $Airbrake_Acceleration$ is the effort of airbrake of your locomotives.
This mod only limit the first part: $Tractive_Acceleration$. Therefore, other physical system will not be changed if you use this mod.