The Pennsylvania Railroad (PRR) class T1 duplex-drive 4-4-4-4 steam locomotives, introduced in 1942 with two prototypes and later in 1945-1946 with 50 production examples, were the last steam locomotives built for the PRR and arguably its most controversial.

The Pennsylvania Railroad T1 might have been the fastest steam locomotive. Train fans are building an icon from scratch to go over 100 mph

It has been claimed that PRR T1 locomotives were capable of achieving speeds in excess of 140 mph (230 km/h) with lighter trains of six or seven cars, and the T1 Trust believes the original T1 design is capable of achieving this feat.

May 13, 2024 · The Pennsylvania Railroad T1 Steam Locomotive Trust brought the frame and four drivers for its 21st-century recreation of the PRR T1 class of 100-mph streamlined 4-4-4-4 passenger engines, all 52 of which were scrapped. Mounted on a low-boy trailer, the display was parked outside the Blair County Convention Center where the meetings took place ...

May 14, 2022 · HARRISBURG, Pa. — In the first public showing of the combined cab, boiler shell, and prow of its new streamlined steam engine, No. 5550, the Pennsylvania Railroad T1 Steam Locomotive Trust displayed its progress on a project whose backers hope …

Jun 20, 2020 · The PRR T1 was a duplex locomotive that utilized a 4-4-4-4 wheel arrangement and was designed to haul 880 trailing tons (798-t) at 100 mph (161 km/h). PRR envisioned using the engines to haul express passenger trains on the 713-mile (1,147-km) route between Harrisburg, Pennsylvania and Chicago, Illinois.

The Pennsylvania Railroad 'Duplex-Drive' Class T1 were a class of 4-4-4-4 tender steam locomotives equipped with Duplex-Drive, they were a real attempt along with the K5 Pacifics to replace the aging K4 Pacifics.

A long response in the Trainorders discussion of Caprotti valve gear include PRR engineer John Roller's method for dealing with wheel slip: "[H]e could control the PRR T1's slipperiness by letting the T1 boiler pressure come way down during station stops, helped by the injector.

May 3, 2024 · The nonprofit Pennsylvania Railroad T1 Steam Locomotive Trust will display its 64-foot-long, 35-ton fabricated frame at the Blair County Convention Center in Altoona on Saturday, May 11, from 10 a.m. to 4 p.m.

The Pennsylvania Railroad's class T1 4-4-4-4 Steam Locomotive. WOW! The highlight of the Altoona and Baldwin Locomotive Shops during the late steam years was the construction of 52 of these Greyhounds built for fast Passenger service.