Hump Yard Grades

[cascaderailroad]

Bumping an old thread, as it is related

Try this gradient on this route ... hump yard decoupling speed is 5 mph, or less ... any faster and you will have roll trough's !

This WIP route gives a slow rolling speed of railcars ... holds 8700 railcars ... Careful: If you load it up with that many railcars and locos, your PC framerates will lock up !

https://www.cubby.com/pl/New+Folder+(3)/_e7d9f750513842bfb03c4d0c7375d28e

 

[bendorsey]

I agree with the 5 MPH max. Possibly even a little less.

Remember your high school physics? Kinetic energy equals 1/2 mass times velocity squared. Doubling the (down) grade quadruples the energy required to slow or stop the cars.

Ben

 

[JohnnyC1]

I can hump at 1mph, no stopping, down a 3% grade with 2 sets of retarders one at each track to slow the cars and 3/4 at the end to stop the car. I use the T12 hump track that will auto uncouple at the Hump Crest. Never had a run thru.

John

 

[cascaderailroad]

I could never get the retarders working in TRS2006, so if you try my route below, you will see that my hump is an extremely shallow grade, and is not very long at all ... and the coasting track is like a mile long, with a gradient of @ 0.002%, and I used a slight kickback at the yard exit (at one time).