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Dapol 4F-083-003

JNA-Y 'Hawk' Inner Wagon Network Rail Yellow 81705831107-4

Manufacturer catalogue image - please note that pre-release images may be CAD renders or CGI/AI images rather than photographs

Prototype Era
Era 11 (2016 to 2026) The Last Days of Privatisation

Manufacturer description

The JNA-Y, commonly known as the “Hawk”, is a modern Network Rail engineering wagon and a familiar sight on today’s British railway. Introduced through a large-scale rebuild programme, these wagons were converted from the earlier MRA side-tipping ballast wagons, extending their working life and aligning them with modern engineering practices.    

Stripped back to their original frames and rebuilt with new steel box bodies, the JNA-Y offers a robust, high-capacity open wagon designed for loading and unloading by excavator or grab. The conversion programme, delivered for Network Rail in the early 2020s, has produced around 300 wagons, making the JNA-Y one of the most numerous contemporary engineering wagon types.   
 
In service, JNA-Y wagons are used for ballast, spoil and general infrastructure materials, typically operating in long rakes behind modern diesel locomotives, but can equally be spotted operating singly. Finished in Network Rail yellow and often heavily weathered, they are an essential component of the current-era engineering scene, making them an ideal addition to any modern image OO gauge layout. 

Engineering Prototype

We are delighted to launch the JNA-Y with the Engineering prototypes, showing both the conversions from the end and middle cars of the MRA, which have different buffer beams.

Specifications

• Utilising the highly acclaimed Dapol OO Gauge MRA model as a base, with a new body and improved chassis, Bogies and buffer beams
  
• Finely applied livery with accurately printed detail
  
• High level of detail on the body, bogies and buffers representing both MRA end and centre cars
  
• Profiled wheels for exceptionally smooth running
  
• Heavy dicast subfloor for added weight
  
• NEM pockets with self-centring couplings

Catalogue listing

Dapol JNA‑Y “Hawk” Inner Wagon – Network Rail Yellow, OO gauge, product code 81705831107‑4. Manufacturer part number 4F‑083‑003. The model represents a current‑era Network Rail engineering wagon.

The JNA‑Y, commonly called the “Hawk”, is a modern open wagon used on the British railway network for transporting ballast, spoil and other infrastructure materials. It was created through a large‑scale rebuild programme that converted the older MRA side‑tipping ballast wagons, stripping them back to their original frames and fitting new steel box bodies. Around 300 wagons were produced for Network Rail in the early 2020s, making the JNA‑Y one of the most common contemporary engineering wagons.

The Dapol model is based on the highly regarded OO‑gauge MRA kit. It incorporates a new body, improved chassis, bogies and buffer beams, and is finished in Network Rail yellow with fine printed detail. The model is available with both end‑car and centre‑car buffer beam variations, reflecting the two types of converted MRA wagons.

Key specifications:
- New steel box body on original MRA frame
- Profiled wheels for smooth running
- Heavy die‑cast sub‑floor for added weight
- NEM pockets equipped with self‑centering couplings
- Accurate livery and detailed fittings on body, bogies and buffers.