Double-Radius Curved Rail
R-21
A curve that sweeps wide around the outside of the Curved Rail. It gives you a relaxed, easy turn.
It turns in the same 45° steps, so 8 rails make 1 lap just like the ordinary Curved Rail. Only the size of the loop differs — where you have the space, it lets the line stretch out.
Dimensions
- Part number
- R-21
- Category
- Curves
- Ends
- ① slot · ② tab
- Shape
- radius 432mm · 45°
- Rail length
- 339mm
- Footprint
- 343mm × 165mm
- Flipping
- Can be flipped
Tips for building
- Connect 8 of these curving the same way and they close a full 360° loop.
Build with these exact dimensions
You can lay out every part, Double-Radius Curved Rail included, using real-world dimensions. It accounts for the free play in every joint, so you know whether the loop closes before you build.