I guess I misunderstood what was meant by re-blocking. I am interested in sorting cars, generating consists to deliver down the line. Ultimately, my goal is to have an operator work the yard while another operator picks up/delivers consists. I'm thinking at the minimum I could get away with just 1 track for a/d while two would be nice. The only part of the yard I'm wanting to be double ended is the a/d tracks, as I believe the sorting tracks can be stub ended. I'm not really looking to have huge amount of yard tracks like 15 or 30, etc. I'm happy with 4 to 5 tracks. I plan to include a small engine facility for maybe two or three engines.
Hi John --
One issue that really hasn't been explored enough is exactly how you plan to use this yard.
You seem to say that you want your yard to accommodate having two up to six foot trains arrive and drop off cars, the cars being sorted and a third up to six foot train depart. Six feet in H0 scale means that we are talking an engine, a caboose and about ten 40' cars.
What destinations and origins does your trains have?
Will you have staging (a track - visible or hidden, that represents "places further east/west/north/southwards"), so trains will be arriving from places further away or departing for places further away during your operating session, or will you be representing the connection to the rest of the world by starting a session with a train "having just arrived" or with cars that "arrived last night" in your yard and end the session with a train "about to depart" or with cars that "will be picked up tonight" in your yard ?
If you imagine a session - what trains will be coming into your yard?
Will some of the trains just stop to set out a block (group) of cars and/or pick up a block of cars, and then move on towards other places (i.e. staging), or will the trains always terminate in your yard?
How many trains will originate in your yard? Where will they be headed for? Will they originate from the yard, go out to some area, switch industries and then come back with cars picked up at the industries? Or will they take cars and just depart with them - i.e. go into staging?
How many different groups of cars will it be necessary for your yard to hold on to at the same time - e.g. "cars for the eastbound local", "cars for eastern destinations beyond the layout", "cars for westbound destinations beyond the layout", "cars for railroad Y" etc ? That tells you how many tracks you should have in your yard.
How many cars do you reckon will go into each block/group? Will each block go out on a separate train, or will one train take two or three blocks - e.g. will both cars for local industries and cars for an interchange track (for another railroad) go out on the same train?
It is not a given that you will need to have each block be 10 cars -
running more short trains may be more fun than running a few longer
Anyways - thinking about how traffic will move on your railroad will help you decide what functionality you will need for your yard.