Best diesel on trainz

[freightcar2]

Odd!

A Slug Unit, or "Master to Slave" units as called in the UK, are units that technically have no Prime mover. A large block of concrete usually acts as the weight of what would be the prime mover. It only has Traction motors, which draw power off the mother unit which has the prime mover. No slug can be operated as itself.
Personally, Slugs are useless units that serve no real road purpose unless they are needed for yard work. Some larger units like the ATSF's GP60Bs were units that had Prime Movers, but recieved all control from the mother unit.
My 2c.
Sean

So if they can't move on their own, how come the Trainz Slugs can move without being pulled by another loco?

 

[Michael_Evans]

Sean explained it better

 

[LVman]

Because trainz doesnt understand the physical difference. When the slug was created, it was given the file asset to act as if it were a locomotive with its own prime mover. Trainz hasnt the capability to understand if its a slug unit, or road unit. So that explains why it can move under its own power in trainz. in real life, the only way to make a lone slug move is to release the air and start pushin. (with human force.)
Sean