What Is the Horsepower of UP Steam Engine 4014?

The Union Pacific 4014 is a legendary steam engine that’s captivated the minds of train enthusiasts for decades. Known for it’s raw power and impressive performance, the 4014 is a true icon of the railroad industry. One of the most fascinating aspects of this magnificent machine is it’s horsepower, which measures an astounding 7,000 hp (5,200 kW). With such a formidable power output, the 4014 is capable of reaching a maximum speed of 80 mph (130 km/h), making it a force to be reckoned with on the tracks. Additionally, it’s tractive effort is measured at an impressive 138,240 lbf (614.9 kN), with a factor of adhesion of 3.91. These figures demonstrate the sheer might and capabilities of the Union Pacific 4014, solidifying it’s status as a true powerhouse of the rails.

How Much Horsepower Did the Pennsylvania T1 Have?

The Pennsylvania T1 locomotive, renowned for it’s power and performance, boasted an impressive amount of horsepower. It’s engine was capable of developing around 6,550 indicated horsepower (4,884 kW) at a speed of 85 mph (137 km/h). This immense power allowed the T1 to conquer challenging terrains with ease and pull heavy loads effortlessly.

Furthermore, the T1 engine boasted a maximum tractive effort of approximately 64,650 pounds-force (287.58 kilonewtons) when factoring in an efficiency factor of 85 percent. This measure indicates the locomotives ability to exert force on the train it was pulling. The T1s remarkable tractive effort allowed it to conquer steep gradients and maintain high speeds, making it a vital asset in the railroads operations.

The 2-6-6-6 Allegheny locomotives, classified as H-8s by the railroad, earned their iconic name by hauling West Virginia coal eastward. These mighty machines, known for their exceptional power, were tested and proven to generate an astounding 7,000 drawbar horsepower, making them the most powerful steam locomotives ever constructed.

How Much Horsepower Does a 2 6 6 6 Allegheny Have?

The 2-6-6-6 Allegheny locomotives, classified by the railroad as H-8s, were specifically designed to tackle the challenging terrain of West Virginia and haul coal eastward. These massive steam locomotives soon earned the name “Allegheny” due to their dominant presence on the tracks. What truly set the Alleghenies apart was their incredible horsepower.

During rigorous trials, it was demonstrated that these locomotives were capable of generating more than an astonishing 7,000 drawbar horsepower. This made the Allegheny locomotives the most powerful steam locomotives ever constructed. The immense power derived from their articulate wheel arrangement, featuring two sets of six driving wheels, which in turn enabled them to effectively navigate the steep gradients and curves of mountainous regions.

To put this extraordinary horsepower into perspective, it allowed the Alleghenies to handle exceptionally heavy coal trains, propelling them efficiently and swiftly over the demanding terrains. The locomotives immense power not only increased hauling capacity; it also improved overall operational efficiency.

The significance of the Allegheny locomotives record-breaking horsepower can’t be overstated. Their exceptional power revolutionized steam locomotive capabilities and solidified their position as the epitome of steam power in the railway industry. Furthermore, the Alleghenies etched their legacy not only in terms of power but also in their contribution to the economic growth and transportation of vital resources in the region they served.

Source: 2-6-6-6


In conclusion, the Union Pacific steam engine 4014 showcases impressive performance figures that attest to it’s incredible power and capabilities. With a maximum speed of 80 mph (130 km/h) and a power output of 7,000 hp (5,200 kW), this locomotive stands as a testament to the advancements in early 20th-century engineering. Additionally, it’s tractive effort of 138,240 lbf (614.9 kN) further emphasizes the sheer strength and force that this magnificent machine possesses. With a factor of adhesion of 3.91, the Union Pacific 4014 demonstrates it’s ability to maintain traction and control even under demanding conditions. Overall, the horsepower of the up steam engine 4014 is a remarkable feat that continues to captivate enthusiasts and historians alike, serving as a significant milestone in the development of locomotive technology.

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