Why Do Steam Excursions Still Bring Diesel Locomotives Along?

Steam excursions often employ diesel locomotives for several practical reasons. These include increased reliability, enhanced pulling power, improved fuel and water management, and greater operational flexibility. Understanding these factors provides insights into why diesel support remains a common practice in the realm of historical rail travel.

Reliability and Safety

One of the primary reasons for bringing a diesel locomotive along is its role as a backup. In case the steam locomotive encounters mechanical issues or technical failures, the diesel can seamlessly take over, ensuring that the journey can proceed without significant disruptions. This reliability is crucial for maintaining the safety and smooth operation of the excursion, even in challenging conditions.

Assistance in Pulling Power

Steam locomotives, while historically renowned for their power, may not always have the necessary capability to handle heavy or lengthy trains, particularly on steep gradients. Diesel locomotives can provide the additional tractive effort needed to maintain speed and safety. This is especially important during seasonal changes or on routes with significant elevation variations, where steam engines might struggle to achieve the required performance.

Fuel and Water Management

Steam locomotives require frequent stops for water and fuel, which can disrupt the overall schedule. Diesel locomotives can help mitigate this issue by offering more consistent and efficient operations between stops. They can also carry additional supplies, ensuring that the trip can continue without the need for frequent refueling or refilling. This flexibility allows for a smoother and more efficient excursion experience, even in areas with otherwise limited resources.

Operational Flexibility

In some instances, diesel locomotives are used for switching or moving cars in rail yards or at stations, where steam engines may be less practical due to their size and operational complexity. Diesel engines are easier to maneuver and can perform these tasks with greater efficiency, making them a valuable asset for the overall operation of the railroad.

Realistic Operations

Many railroads historically operated both steam and diesel locomotives. Including a diesel in excursions can provide a more authentic representation of these mixed operations. This authenticity enhances the experience for historical rail enthusiasts and helps to showcase the evolution of railway technology.

While steam excursions like the Settle Carlisle run can often operate without a diesel assist, there are still valid reasons for maintaining this practice. For instance, the steep gradients and heavy loads on this route can make starting trains particularly challenging. In the last decade, there has been an increase in locomotive slipping incidents, which a diesel assist can help prevent.

The 2022 Jubilee 'Alberta excursion at Appleby was a noteworthy exception, as it navigated these challenges without a diesel. The absence of diesel assistance highlighted the capabilities of the steam locomotive, and the journey was praised for its smoothness and historical authenticity. The sound and performance of the LMS locomotive, operated on a sunny day after heavy rainfall, provided a memorable experience for all who were privileged to be aboard.

Overall, the use of diesel locomotives alongside steam engines in excursions enhances the reliability and efficiency of the passenger journey, while also preserving the historical integrity of railway operations.