Dapol 4F-083-005

JNA-Y 'Hawk' Outer Wagon Network Rail Yellow 81705831101-7

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” Outer Wagon, Network Rail Yellow, product code 81705831101‑7. The model is supplied under Dapol part number 4F‑083‑005 and represents a current‑era railway engineering wagon.

The JNA‑Y is a modern Network Rail wagon that was created by converting earlier MRA side‑tipping ballast wagons. During a large‑scale rebuild programme completed in the early 2020s (approximately 2022), the original frames were stripped and fitted with new steel box bodies, extending the service life of around 300 wagons.

In real‑world service the wagons are used for carrying ballast, spoil and other infrastructure materials. They typically run in long rakes behind diesel locomotives, although single‑wagon movements are also common. The wagons are finished in Network Rail yellow and often appear weathered, reflecting their frequent use on engineering trains.

The Dapol OO‑gauge model is based on the widely used Dapol MRA chassis but incorporates a new body, upgraded bogies and buffer beams, and finely applied livery with printed detail. It features profiled wheels for smooth running, a heavy die‑cast sub‑floor for added weight, NEM pockets and self‑centering couplings, providing a high level of detail suitable for contemporary British railway layouts.