John Bull (locomotive) - Operating Again After 150 Years

Operating Again After 150 Years

The John Bull had remained on static display for another 15 years, but the locomotive's significance as one of the oldest locomotives in existence, or its use on the first railroad in New Jersey, was not very plainly noted in the display's literature. As 1981 and the locomotive's 150th birthday approached, the Smithsonian started discussions on how best to commemorate the locomotive's age and significance. There was very little question that special publications and exhibits would be prepared, but museum officials were left with the thought that the exhibit could still be so much more than that.

Many superficial inspections were performed on the locomotive in 1980 and it was found to be in relatively sound mechanical condition. There wasn't a significant amount of deterioration noted in these early inspections, and when the wheels were jacked off the rails, as they had been 50 years earlier, the axles were found to be freely operable. One morning in January 1980, before the museum opened to the public, museum officials used compressed air to power the cylinders and move the wheels through the connecting rods for the first time since its last semi-operation. After the compressed air blew some dirt and debris out of the locomotive's exhaust stack, it was soon running smoothly.

The running gear seemed to be in good order, but it was still unknown if the boiler could still handle the pressure of steam and a live fire again. The museum asked the Hartford Steam Boiler Inspection and Insurance Company to inspect the locomotive's boiler for operation. The inspections were conducted after hours at the museum (from 6:30 p.m. to 4:00 a.m.) over three days and included electromagnetic, ultrasonic, and radiographic tests. The tests did reveal a few flaws, but it was projected that the engine could operate at a reduced boiler pressure of 50 psi (340 kPa or 3.5 kgf/cm²); as delivered to the Camden & Amboy, the boiler was rated for 70 psi (480 kPa) or 4.9 kgf/cm². The Smithsonian's staff, after a few further hydrostatic tests, were confident that the locomotive could again operate under its own power. The items that needed repair were repaired, and on Oct. 14, 1980, the locomotive was successfully field-tested on the Warrenton Branch Line in Fauquier County between Calverton and Casanova, Va. The site was selected because at the time, only one freight train per week used the branch line. On September 15, 1981, the locomotive operated under steam on a few miles of branch line near the Potomac River within Washington, D.C. With this exhibition, the locomotive became the oldest operable steam locomotive (and oldest self-propelled vehicle) in the world.

The original John Bull is housed on static display at the National Museum of American History in Washington, D.C. The replica of the John Bull, built in 1939, is owned and preserved by the Railroad Museum of Pennsylvania and is, as of 2009, their only operational piece of equipment.