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 accumulating a relatively low 165,000 service miles.

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 pair of rear cylinders were located under the firebox. This limited the firebox size—A concept that was already proven to not work.

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

Q1型和Q2型蒸汽机车，是PRR于20世纪40年代后期至50年代初使用的两款“复式”轮式货运蒸汽机车。 Q1-6130号机车. 背景. 在Q1型蒸汽机车之前，PRR投入运用的最后一款量产快速客运蒸汽机车车型是1914年到1928年间制造的K4型蒸汽机车。 1929年，阿尔图纳工厂和BLW生产了共计2台的实验性K5型蒸汽机车，但它们被认为不足以值得改进。 此后，PRR的注意力转向了铁路电气化和FF1型、GG1型等型电力机车。 曾担当牵引美国总统沃伦·甘梅利尔·哈定葬礼专列的K4s …

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 streamlined engines built at that time.

“大引擎”S1-6100号蒸汽机车，是PRR配备的1台实验性质的“复式”传动蒸汽机车，旨在展示BLW首席工程师Ralph P. Johnson所支持的“复式”传动蒸汽机车的优势。 带有艺术装饰的S1-6100号机车流线型整流罩，由工业设计师Raymond Loewy设计。 牵引旅客列车中的S1-6100号机车. S1-6100号机车具有独特的6-4-4-6机车轮式，这意味着它有2对气缸，每对气缸驱动2对驱动轮。 为了在以超过160.93 km/h的速度牵引快速旅客列车时保证稳定性，S1-6100号机车未使用铰接， …

The PRR Q1 is a NJCB early Korean brass made in 1979(?). The Q2 and J1 are BLI run of mill with subpar Paragon decoders. These are the largest and most power...

This video covers the Pennsylvania Railroads Q1 Experimental Duplex Locomotive known as the Q1. This design paved the way for a follow up class of locomotive...

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 service in 1942, and retired in 1949.

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 arrangement. The B&O was the first with this idea with their George H. Harrison 4-4-4-4.