The Pennsylvania Railroad class Q1, #6130, was a single experimental steam locomotive designed for dual service. The locomotive entered service in 1942, and retired in 1949 after …

PRR Q-1 America's First Freight Duplex. The 1942-built Q1 was the PRR's first freight Duplex prototype. It was built with huge 77" drivers and streamlining. One of the handsomest …

The Pennsylvania Railroad class Q1, #6130, was a single experimental steam locomotive designed for dual service. The locomotive entered service in 1942, and ret... English

The Pennsylvania Railroad Class Q1 comprised of only one experimental 4-6-4-4 duplex drive steam locomotive. Used for freight on the PRR. Unlike the later Q2 duplex design, the Q1's …

The Q1. The next experimental locomotive on the PRR was the Q1 with a wheel arrangement of 4-6-4-4. The PRR was not the first railroad to come up with the idea of an opposing cylinder …

The Pennsylvania Railroad class Q1, No. 6130, was a single experimental steam locomotive designed for dual service. The locomotive was built by the PRR's Altoona Works, entered …

The Q1's drivers were tall for a freight engine. Its rear two cylinders were reversed under the cab (rods moving forward) to drive the two axles of the second group on the rigid frame. The …

The unusual PRR Q1 with its opposite facing cylinders and iconic streamlining. The PRR also desired to apply the duplex principle to freight haulage, and the Q1 was the first experiment in …

Apr 19, 2006 · THE Q1 DUPLEX 4-6-4-4 is a footnote to the Pennsylvania Railroad’s efforts to improve the performance of its M1-class locomotives. The railroad’s question: “Could a duplex …

In Whyte notation, a 4-6-4-4 is a railroad steam locomotive that has four leading wheels followed by six coupled driving wheels, a second set of four driving wheels and four trailing wheels. …