Heljan OO Class 17 BR Green Fye D8539 is a detailed OO gauge diesel locomotive model designed for realistic railway modelling and authentic scale operation on 16.5 mm standard gauge track.

Featuring:

• Detail & Finish: British Rail green livery with full yellow ends and fine moulded bodywork capturing the distinctive centre‑cab design of the Class 17 “Clayton” diesel locomotive.
• Drive & Performance: Smooth motor operation with all‑wheel power pickup and flywheel for consistent running characteristics.
• Control & Compatibility: DCC‑ready with an 8‑pin decoder socket for digital control; also compatible with analogue DC once a decoder is installed. 
• Couplings & Integration: Fitted with NEM pocket mountings and tension‑lock couplers for seamless integration with other OO rolling stock.

Model Dimensions (Approximate):

• Length: 203 mm 
• Scale: OO (1:76) 
• Gauge: 16.5 mm 

Technical Specifications:

• Brand: Heljan 
• Model Type: Diesel Locomotive 
• Era / Prototype: British Rail Class 17 Clayton Type 1, used for light goods and passenger duties in the 1960s. 
• Control System: DCC‑ready with analogue DC compatibility 
• Decoder Interface: 8‑pin socket 
• Minimum Curve Radius: Radius 1 
• Lighting: Directional working lights 
• Material: Diecast chassis with detailed plastic body.
• Power Source: Track‑powered 
• Assembly: Ready‑to‑run 
• Included: Locomotive model only 

Ideal for modellers building detailed OO gauge layouts and collectors of classic British diesels seeking authentic period livery, flexible control options, and seamless integration with existing rolling stock.

Why this model matters

The British Rail Class 17 “Clayton” was a distinctive twin‑engined Type 1 diesel locomotive built in the early 1960s. Although its prototype design proved mechanically unreliable, it remains an interesting and visually unique part of BR’s history. This OO gauge model captures the full‑yellow‑ended livery and centre‑cab profile faithfully while offering modern control flexibility with its DCC‑ready interface and working lights, making it a compelling choice for enthusiasts focused on 1960s–70s layouts.

How to use it

Place the ready‑to‑run locomotive on clean OO gauge track. For analogue DC operation, use a standard controller. For digital operation, install a compatible 8‑pin DCC decoder before use. Maintain clean wheels and track for optimal pickup, check couplings when connecting to other stock, and store the model in a protective environment when not in use to preserve its detailed finish and mechanical components.