What is the largest diameter curve on your layout (031, 072, etc) ? This information may help manufacturers in the real world. Mine is 042. JohnA
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080
Custom but normal (standard) for the mainline is O72.
George
027
John
O72
Atlas O sectional curves......0-108.... go big or go home !
0-27
Curt
Old Realtrak layout O-82 (may it rest in pieces)
New Atlas layout will have 108 in some stretches and 72 at the end of loops
O-42, though the next one will be O-72
o 128
Mainlines - O80 in the temporary section, O90 when complete. O72 in the yards, 054 for some spurs.
The mainline is O36, though I do have a piece of O72.
BTW, all O48 switches.
4x12 layout, so 042.
O-72 on 12'-by-8' layout.
O-54 on 10'-by-5' layout.
MELGAR
O72 on 9x14 layout
Realtrax o31
o 128
080
027
The largest curve is flex track, measured to be about 99" diameter. The tightest curve is O54 on a couple of industry sidings, other than that, O72 is the tightest curve.