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This is a starter kit for a Helix suitable for OO gauge British Outline 3rd and 4th radius curved track (Peco, Hornby or Bachmann) and has a track bed 135mm wide.  It comes complete with 2 straight entrance/exit Ramps. It can be built either rising clockwise or anticlockwise.

Our Helix kits are laser cut from 6mm thick Lightweight Poplar ply, not MDF.  Poplar ply being a lot more stable and longer lasting than other substrates.  They come complete with M8 threaded rods, washers and nuts. All joints are fully supported.

The starter kit is for the first circuit and a half rising at approx 80mm (approx 3 5/32 inches) per circuit, so in total it will rise approx 120mm (approx 4 23/32 inches) in height.  As you can see from the picture, you end up with 72mm from the top of the wooden track bed to the underside which is enough for clearance for steam, diesel and electric locos with Pantographs down, The loco pictures are on code 100 track on top of a 5mm foam bed.  

The Inner circuit based on 3rd Radius curves of 505mm has a gradient of 1 in 39 / 2.5%

The outer circuit based on 4th Radius curves of 571mm has a gradient of 1 in 44 / 2.2%.

This pack comes with the following:

                              16x 500mm Threaded Rods

12x 1/8 circle sections.

  2x  Straight sections.

12x  Connecting bridges including 11x inner segment guides, 11x outer segment guides, 2x inner Straight to Circle guides, 2x outer Straight to Circle Guides.

16x M8 Steel threaded rods cut to approx length required and all required nuts and washers


Additional complete circuits are available with each circuit rising approx 80mm, so a starter kit + one circuit would give you a rise of 200mm, a starter kit and two circuits would give you a rise of 280mm and so on.

Additional 1/4 and 1/2 circuits are also available.


You will need a level surface to start with of 1300mm x 1300mm and basic tools (a drill, 2x 13mm spanners, spirit level) and wood glue.

Other bespoke Radii are available to order please contact us for a quotation. 


Please Note:

All Helixes are made to order and will take 2 weeks to produce.

No Baseboards are included, they are available to special order, please contact us for more info.


NB: If you are going higher than the 500mm rods supplied, please call us to place your order rather than use this one so we can amend for 1000mm rods for a supplimentary charge.



Features / Specification

Please Note:  The pictures of the helix under construction were not fixed and have just been erected to show what comes with the kit, 

Helix Template download.

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Helix for HO/OO 3rd & 4th Radius Curve Starter Kit with 2 Straight Ramps

£75.95 inc. VAT