CoasterForge

Parametric 3D roller-coaster designer. Pick a layout, watch the physics-driven supports and speed profile update, then cut the whole ride into bed-sized pieces ready for FDM printing.

Layout Coaster type

Track Builder

…or load a preset to edit

Segments (chained end-to-end)

Empty — add your first segment below.

Add segment — previewed live in the scene

Length (m) 10

Target pitch (°) 0

Peak angle (°) 20

Radius (m) 8

Turn angle (°) 90

Bank (°, 180 = fully inverted) 20

Roll to (°, 0 = level, 180 = inverted) 0

Turns 1.00

Direction

The green ghost piece in the scene shows exactly where this segment will sit — adjust the sliders to line it up, then place it. Every segment continues from wherever the last one finished, so the ride is always physically continuous.

Print scale Model scale Printer bed X × Y × Z (mm)

Only individual pieces need to fit the bed — the assembled ride is far larger. Default bed matches an Ender-3 V2 Neo.

Track geometry Track style Rail diameter (mm) 3.0 Rail gauge (mm) 11 Tie spacing (mm) 9

Ride physics Train mass (kg) 1600 Rolling friction 0.024 Lift chain speed (m/s) 2.2 Brake exit speed (m/s) 2.5

Supports (force-sized) Spacing, real-world (m) 6 Min / max post ⌀ (mm)

A-frame above height (mm) 45

Post ⌀ scales with a simplified cantilever-beam estimate: leg height × the simulated G-load at that point. Not a certified structural calc — a physically-motivated heuristic.

Ride stats

computing…

Export for printing

The kit cuts every rail run and tall support into bed-sized pieces, each with a matching sleeve connector for glue-up, plus an assembly manifest. Lift hill pieces are left open between ties so you can thread a real fine chain through before final assembly.

track

lift hill

brakes

supports

drag to orbit · scroll to zoom · right-drag to pan