Atlas O 21st Century (3-rail): track pieces, radii and turnouts
Atlas O 21st Century (3-rail) is a three-rail track system without roadbed for O scale.
The Trackplanner catalogue lists 46 pieces: 9 straights, 16 curves, 12 turnouts, 2 curved turnouts, 1 Y turnout, 5 crossings and 1 double slip. The curves come in 10 radii from 342.9 to 1371.6 mm.
Key facts
Scale
O scale
Rail system
three-rail
Roadbed
no roadbed
Status
current — in production and in the shops
Turnout motor
integrated (in the turnout or roadbed)
Pieces in the catalogue
46
Radii
10 · 342.9–1371.6 mm
Straight lengths
31.8 · 44.5 · 114.3 · 139.7 · 254 · 508 · 1016 mm
Turnout angles
7.66° · 11.54° · 22.5° · 30°
Pieces by type
Type
Count
Straights
9
Curves
16
Turnouts
12
Curved turnouts
2
Y turnouts
1
Crossings
5
Double slips
1
Radii
Radius
Angle
Articles
342.9 mm
45° · 22.5°
6043 · 6044
457.2 mm
30° · 7.5°
6066 · 6068
571.5 mm
30° · 7.5°
6045 · 6046
685.8 mm
22.5° · 11.25°
6060 · 6061
800.1 mm
22.5°
6064
914.4 mm
22.5° · 11.25°
6062 · 6063
1028.7 mm
22.5° · 7.5°
6011 · 6012
1143 mm
22.5°
6013
1257.3 mm
22.5°
6014
1371.6 mm
22.5°
6016
Turnouts and crossings
Article
Type
Angle
6075
Turnout left
30°
6076
Turnout right
30°
6085
Turnout left
30°
6086
Turnout right
30°
6070
Turnout left
22.5°
6071
Turnout right
22.5°
6072
Turnout left
22.5°
6073
Turnout right
22.5°
6024
Turnout left
11.54°
6025
Turnout right
11.54°
6021
Turnout left
7.66°
6022
Turnout right
7.66°
6077
Curved turnout left
—
6078
Curved turnout right
—
6074
Y turnout
—
6080
Crossing
—
6081
Crossing
—
6082
Crossing
—
6083
Crossing
—
6084
Crossing
—
6027
Double slip
11.54°
All pieces
Show all 46 pieces
Article
Type
Dimensions
6015
Straight
31.8 mm
6052
Straight
44.5 mm
6059
Straight
44.5 mm
6051
Straight
114.3 mm
6053
Straight
139.7 mm
6010
Straight
254 mm
6050
Straight
254 mm
6923
Straight
508 mm
6058
Straight
1016 mm
6043
Curve
R 342.9 mm · 45°
6044
Curve
R 342.9 mm · 22.5°
6066
Curve
R 457.2 mm · 30°
6068
Curve
R 457.2 mm · 7.5°
6045
Curve
R 571.5 mm · 30°
6046
Curve
R 571.5 mm · 7.5°
6060
Curve
R 685.8 mm · 22.5°
6061
Curve
R 685.8 mm · 11.25°
6064
Curve
R 800.1 mm · 22.5°
6062
Curve
R 914.4 mm · 22.5°
6063
Curve
R 914.4 mm · 11.25°
6011
Curve
R 1028.7 mm · 22.5°
6012
Curve
R 1028.7 mm · 7.5°
6013
Curve
R 1143 mm · 22.5°
6014
Curve
R 1257.3 mm · 22.5°
6016
Curve
R 1371.6 mm · 22.5°
6075
Turnout left
30°
6076
Turnout right
30°
6085
Turnout left
30°
6086
Turnout right
30°
6070
Turnout left
22.5°
6071
Turnout right
22.5°
6072
Turnout left
22.5°
6073
Turnout right
22.5°
6024
Turnout left
11.54°
6025
Turnout right
11.54°
6021
Turnout left
7.66°
6022
Turnout right
7.66°
6077
Curved turnout left
—
6078
Curved turnout right
—
6074
Y turnout
—
6080
Crossing
—
6081
Crossing
—
6082
Crossing
—
6083
Crossing
—
6084
Crossing
—
6027
Double slip
11.54°
Dimensions in mm, angles in degrees, from the Trackplanner catalogue. Where the data does not give a value unambiguously, the field stays empty.