2.5 LEVEL HELIX for Roco Line R3/R4

PROSES Helix for Roco-Line (R3 / R4 – 419.6 mm / 481.2 mm, 2.5 Levels)

Optimize your layout with the PROSES Modular Helix V3, designed specifically for Roco-Line R3 & R4 curved tracks (42423 / 42523 and 42424 / 42524), and fully compatible with any flex track.
This double-track, 2.5-level helix provides a compact, efficient, and reliable solution for gaining elevation while maintaining smooth train operation.

Key Features

• Modular Design: 2.5 loops (levels) with easy, flexible assembly
• Perfect for Roco-Line: Designed for R3 & R4 curved tracks or any compatible flex track
• Double-Track Layout: Ideal for continuous up/down traffic and realistic operations

Dimensions & Technical Details

• Track Radius:
– R3: 419.6 mm (16.5")
– R4: 481.2 mm (18.9")
• Segment Width: 15 cm (5.9")
• Vertical Clearance Between Levels: 10 cm (3.94")
• Total Height: 30 cm (11.8")
• Overall Width: 107 cm (42")

Gradient

• Inner Track Gradient: 3.8%
• Outer Track Gradient: 3.3%
Designed to ensure reliable operation even with longer trains.

Easy & Flexible Assembly

All PROSES helices can be assembled clockwise or anti-clockwise, allowing:
• Entry or exit from left or right
• Entry or exit from top or bottom

This flexibility makes the helix suitable for a wide range of layout designs—whether permanent or modular.