The North Norfolk Railway (NNR) has unveiled a world-first in steam preservation: WD 90775, a 2-10-0 War Department locomotive, has been successfully adapted to run on both coal and oil, making it the first “dual fuel” steam engine of its kind.
In an effort to tackle increasing fire risks during long dry spells, the heritage railway has developed an innovative solution that allows the locomotive to switch from traditional coal firing to oil burning when conditions demand it.
A World-First for Steam Preservation
The unique system was developed by the dedicated engineering team at Weybourne, who proposed the idea to NNR management in spring 2024. Now, exactly one year later, WD 90775 has completed its first test runs as an oil-fired locomotive on Tuesday 1 April 2025.
Graham Hukins, NNR General Manager, commented:
“The team approached me with this idea last April, and it’s incredible to see it realised exactly a year later. Our ‘April Fuel’ initiative was born from a desire to be more resilient and proactive in the face of changing weather patterns and increased fire risk.”
How the Dual-Fuel System Works
Unlike full oil conversions, the NNR’s system is modular and reversible:
- A temporary oil tank is fitted into the tender’s generous coal space.
- A ground-level oil filling point is installed for easy replenishment.
- A specially designed burner unit sits inside the locomotive cab, delivering heat through the open firehole doors.
Chief Mechanical Engineer, Keith Ashford, explained:
“Our system offers the best of both worlds. It can be fitted in a couple of days when dry conditions make coal firing problematic, and it can be just as quickly removed when the weather turns. Because the burner is in the cab, the firebox remains untouched – allowing us to seamlessly revert to traditional coal firing.”
This contrasts with the approach being taken by the North Yorkshire Moors Railway, where sister engine Dame Vera Lynn is undergoing a permanent oil conversion.
Test Runs and Upcoming Service
WD 90775 successfully completed several oil-fired test runs this morning before returning to the shed, where the system will be temporarily removed. The loco is scheduled to return to service over the Easter holidays, operating as part of the NNR’s full timetable.
Built in 1943, WD 90775 is a key part of the railway’s operational fleet and is expected to feature prominently during the 2025 main season, which runs with daily services through to October.
Ride the NNR and See History in Action
Steam fans and families alike are encouraged to experience this historic development by visiting the North Norfolk Railway this spring and summer. Advance booking is recommended, with a 15% discount available for online bookings.
For timetables, events, and to book tickets, visit 👉 www.nnrailway.co.uk
