Two questions..

[nighthawk123]

Can someone explain to me what does MASS, in wheel configuration actually do? I tested some tractors, in tug of war against each other, mt875e vs quadtrack 620, with morerealistic mod, and i couldnt move quadtrack with mt875e, even when quadtrack had its engine turned off, but then i changed Mass in wheel configuration from 0.5 to 3, and i managed to pull quadtrack without problems. I noticed that all big tractors have mass set to 0.5 in wheel configuration, so im not sure what it does, or is it good thing to mess with it

radius="0.88" tireType="crawler" forcePointRatio="0.2" initialCompression="14" suspTravel="0.2" spring="150" damper="20" frictionScale="2" mass="0.5"