4.5 LEVEL HELIX for Kato HO Unitrack (R490 mm, 19 1/"4 / R550 mm, 21 5/8")

PROSES Helix for Kato Unitrack (R490 mm, 19 1/"4 / R550 mm, 21 5/8", 4.5 Levels)

Optimize your layout with the PROSES Modular Helix V3, designed specifically for Kato Unitrack and compatible with track radii of 490 mm and 550 mm. This double-track, 4.5-level helix offers a high elevation gain while keeping the same large-radius, low-gradient design for smooth and dependable train operation.

Key Features

• Modular Design: 4.5 loops (levels) with quick and easy assembly
• Perfect for Kato Unitrack: Designed for Kato Unitrack double-track configurations using 490 mm and 550 mm radii
• Double-Track Layout: Ideal for continuous up and down traffic and realistic railway operation
• Low Gradient Design: Large radii provide very gentle inclines for reliable operation of long trains

Dimensions & Technical Details

• Track Radius:
– Inner: 490 mm (19 1/4")
– Outer: 550 mm (21 5/8")
• Track Bed Width: 15 cm (5 7/8")
• Number of Levels: 4.5
• Vertical Clearance Between Levels: 10 cm (4")
• Total Height: 50 cm (20")
• Overall Width: 120 cm (47")

Gradient

• Inner Track Gradient: 1.30%
• Outer Track Gradient: 1.16%

These very gentle gradients allow smooth and dependable operation, even for long passenger trains and heavy freight consists.

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 both permanent layouts and modular exhibition layouts.

Compatibility

Designed for Kato Unitrack double-track systems using Kato 2-270 and 2-210 curved tracks, providing a large-diameter helix with smooth transitions and excellent operational reliability.

🚂 PROSES Modular Helix V3 – Easy • Quick Build • Light • Durable