24-06-2008, 01:36 PM
Thanks Peter, the solution is not at all obvious, I would never (in an exam situation) have thought to split the train and use the Goods Loop and Sidings to facilitate this. But now you have suggested it, it is the obvious and only realistic solution (though I expect there are others, no idea what though).
I think that has been an extremely valuable lesson, i.e. don't always expect the answers to jump out at you. I think that this points to experience being key and getting as much practice in as possible before the exams on as many layouts as possible.
However, in my day job if I saw a proposed layout that required this kind of freight movement through a station and across a section of mainline with 12 passenger movements an hour (plus 2 through freights) I would fall off of my chair!
Mainly because the 4 stone freight moves per day has just grown to 36!
1. arrive from A, at Goods Loop, leave 1/2 of wagons and proceed to stone yard
2. return from terminal stop on Up Main
3. shunt into Up Sidings
4. loco back onto Up Main, shunt onto Passenger Loop
5. reverse back to Goods Loop for remaining wagons
6. proceed to Stone Terminal
7. return from Stone Terminal, stop on Up Main
8. shunt into Up Sidings, pick up 1st 1/2 of wagons
9. return to A.
repeating this process 4 times a day...might infringe on capacity
As we discussed in the study group the operation in the stone terminal requires quite a bit of thought, and so will all of the necessary call-on, shunt signals, L.O.S. and stop boards etc around the Up Sidings and Goods Loop. I think I might be inclined to get as many marks as I could from other areas on the paper first, but then I suppose that there are quite a few marks to be had for getting the Stone Terminal operation "correct"...dilemma!
Steve.
I think that has been an extremely valuable lesson, i.e. don't always expect the answers to jump out at you. I think that this points to experience being key and getting as much practice in as possible before the exams on as many layouts as possible.
However, in my day job if I saw a proposed layout that required this kind of freight movement through a station and across a section of mainline with 12 passenger movements an hour (plus 2 through freights) I would fall off of my chair!
Mainly because the 4 stone freight moves per day has just grown to 36!
1. arrive from A, at Goods Loop, leave 1/2 of wagons and proceed to stone yard
2. return from terminal stop on Up Main
3. shunt into Up Sidings
4. loco back onto Up Main, shunt onto Passenger Loop
5. reverse back to Goods Loop for remaining wagons
6. proceed to Stone Terminal
7. return from Stone Terminal, stop on Up Main
8. shunt into Up Sidings, pick up 1st 1/2 of wagons
9. return to A.
repeating this process 4 times a day...might infringe on capacity
As we discussed in the study group the operation in the stone terminal requires quite a bit of thought, and so will all of the necessary call-on, shunt signals, L.O.S. and stop boards etc around the Up Sidings and Goods Loop. I think I might be inclined to get as many marks as I could from other areas on the paper first, but then I suppose that there are quite a few marks to be had for getting the Stone Terminal operation "correct"...dilemma!
Steve.