Looks good to me except that your turnouts will take up much more room than your plan displays and curves will need to be much broader.
I like the operations afforded by this design, but I would caution about the "around the edge" track plan. I too am working on a HCD layout. I would like to see some examples of up & over styles. I'll try to sketch out my ideas and get them posted.
thanks thanks for the im sure when i would draw it out on foam i would lose a good bit of room but for a rough idea at least in the right direction. i hope
Here's what the plan looks like to scale. I made a few changes just for visual appeal. Outside radius is 15, inside 13. All #4 turnouts.
A problem that I see is that if you are going counter clockwise, you can go from the inside loop to the outside loop, but you can't go back. If you are going clockwise, you can go from the outer loop to the inner loop, but you can't go back. An additional crossover could fix that.
Yes it does. I used Xtrkcad and their provided Unitrack library. Give me a few minutes and I'll see if I can export a quick parts list for you.
My only thoughts about the current yard / crossover arrangement: A train can leave the yard and gain immediate access to the outside loop. This is likely a "nice to have". If you move the yard lead to the right of the crossover then it or a yard lead can be longer. Since the yard is proportionately about right for the layout size that could be moot. A 2nd cross over could be added to the left so trains can move from between loops despite direction of travel. #6 Turnouts could be used for the crossovers if you preferred.
Sorry I didnt post this last night, but here's the parts list for the plan I posted: XTrackCAD Parts List bwotring85 Tue Feb 23 21:13:54 2010 Count | Description ------+--------------------------------------------- 31 | Kato Unitrack 20-000 Straight 9.75 248mm 6 | Kato Unitrack 20-020 Straight 4 7/8 124mm 8 | Kato Unitrack 20-132 Curve 13.75R 348mm 45° 14 | Kato Unitrack 20-140 Curve 15R 381mm 30° 6 | Kato Unitrack 20-160 Curve 19R 481mm 15° 3 | Kato Unitrack 20-220 Turnout 4-L 9 | Kato Unitrack 20-221 Turnout 4-R ------+---------------------------------------------