Hornby TT is a two-rail track system without roadbed for TT scale.
The Trackplanner catalogue lists 25 pieces: 9 straights, 11 curves, 2 turnouts, 1 Y turnout and 2 crossings. The curves come in 5 radii from 267 to 640 mm.
Key facts
Scale
TT scale
Rail system
two-rail
Roadbed
no roadbed
Status
current — in production and in the shops
Turnout motor
sold separately
Pieces in the catalogue
25
Radii
5 · 267–640 mm
Straight lengths
41.5 · 83 · 92 · 166 · 332 mm
Turnout angles
14.52°
Pieces by type
Type
Count
Straights
9
Curves
11
Turnouts
2
Y turnouts
1
Crossings
2
Radii
Radius
Angle
Articles
267 mm
30° · 15° · 7.5°
TT8003 · TT8014 · TT8020
310 mm
30° · 15°
TT8004 · TT8015
353 mm
30° · 15°
TT8005 · TT8016
396 mm
30° · 15°
TT8006 · TT8017
640 mm
15° · 7.45°
TT8007 · TT8049
Turnouts and crossings
Article
Type
Angle
TT8008
Turnout left
14.52°
TT8009
Turnout right
14.52°
TT8043
Y turnout
—
TT8018
Crossing
—
TT8019
Crossing
—
All pieces
Show all 25 pieces
Article
Type
Dimensions
TT8011
Straight
41.5 mm
TT8012
Straight
83 mm
TT8037
Straight
92 mm
TT8001
Straight
166 mm
TT8002
Straight
166 mm
TT8013
Straight
166 mm
TT8029
Straight
166 mm
TT8039
Straight
332 mm
TT8010
Buffer stop (fits onto the track)
—
TT8003
Curve
R 267 mm · 30°
TT8020
Curve
R 267 mm · 15°
TT8014
Curve
R 267 mm · 7.5°
TT8004
Curve
R 310 mm · 30°
TT8015
Curve
R 310 mm · 15°
TT8005
Curve
R 353 mm · 30°
TT8016
Curve
R 353 mm · 15°
TT8006
Curve
R 396 mm · 30°
TT8017
Curve
R 396 mm · 15°
TT8007
Curve
R 640 mm · 15°
TT8049
Curve
R 640 mm · 7.45°
TT8008
Turnout left
14.52°
TT8009
Turnout right
14.52°
TT8043
Y turnout
—
TT8018
Crossing
—
TT8019
Crossing
—
Dimensions in mm, angles in degrees, from the Trackplanner catalogue. Where the data does not give a value unambiguously, the field stays empty.