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Description
PRR Class T1 4-4-4-4 Duplex Locomotives were designed for fast passenger service on the Pennsylvania Railroad. The T1 had it all, the latest technology and Raymond Loewy streamlining. They were big, fast and powerful, but very unorthodox. Too much experimentation and the advent of the diesel electric locomotive, led to their downfall, but for a short time they ruled the rails!

Specifications of the T1 Locomotive:

Cylinders .......................................... 19 3/4" x 26"
Drivers ............................................................ 80"
Steam Pressure .......................................... 300 lbs
Grate ........................................................ 92 sq ft
Engine Weight ....................................... 502,200 lbs
Tractive Force .......................................... 65,000 lbs
Tender ............................................. Class 180-P-84
Capacity Water ........................................ 19,200 gal
Capacity Coal ......................................... 42 1/2 tons
Total Tender Loaded Weight ........................ 221 tons
Total Length of Engine and Tender .................... 122 ft
Maximum Speed ....................................... 120 mph+

Some T1 history:
The first two T1 locomotives were 6110, and 6111. Both locomotives were experimental and built to Pennsy specifications by Baldwin Locomotive Works ( BLW ) of Philadelphia Pennsylvania in 1942. They arrived just in time to help out with WWII traffic. They were so big that they could only operate west of Harrisburg. 6111 was unique in that it was equipped with a Franklin booster in its trailing truck. The Franklin Booster added an additional 13,500 lbs. of tractive effort, giving her a total tractive force of 78,500 lbs, no other T1's were built with boosters. In the spring of 1944, after logging 120,000 miles of road service, 6110 was sent to Juniata test plant in Altoona Pennsylvania for extensive testing. 6110 met or exceeded all expectations of the Pennsylvania Railroad engineering department and based on these satisfactory tests, the Pennsylvania Railroad ordered fifty more T1's! The new locomotives were built between 1945 and 1946. The Juniata shops built locomotives 5500-5524, plus all the coal and water tenders, while Baldwin built the remaining locomotives 5525-5549. There were some minor design changes to the appearance of these 50 locomotives, mostly for ease of maintenance, but they still retained the almost shark like appearance of the original two prototypes 6110, and 6111. The T1's marked the end of an era for the Pennsy, they were a last ditch effort to build a steam locomotive that could compete with the new diesel locomotives. Sadly it was all too little too late and the T1's were the last steam locomotives ever built by the Juniata Shops. With all their beauty, power and technology, the T1's were just no match for the efficiency of the Diesel electric locomotive. In the end T1s were just too big and complicated as well as too difficult to maintain. All T1's were eventually retired and scrapped.

My illustration shows T1 No. 6110 and a proud crew member at the 31st railroad yard in Pittsburgh, the bridge in the background is the 28th Street Bridge [link] that connects Liberty Avenue and the Strip District with Polish Hill.

Adobe Illustrator 8.0, Apple Macintosh G3 iMac, OS 9.2.

Description
PRR Class T1 4-4-4-4 Duplex Locomotives were designed for fast passenger service on the Pennsylvania Railroad. The T1 had it all, the latest technology and Raymond Loewy streamlining. They were big, fast and powerful, but very unorthodox. Too much experimentation and the advent of the diesel electric locomotive, led to their downfall, but for a short time they ruled the rails!

Specifications of the T1 Locomotive:

Cylinders .......................................... 19 3/4" x 26"
Drivers ............................................................ 80"
Steam Pressure .......................................... 300 lbs
Grate ........................................................ 92 sq ft
Engine Weight ....................................... 502,200 lbs
Tractive Force .......................................... 65,000 lbs
Tender ............................................. Class 180-P-84
Capacity Water ........................................ 19,200 gal
Capacity Coal ......................................... 42 1/2 tons
Total Tender Loaded Weight ........................ 221 tons
Total Length of Engine and Tender .................... 122 ft
Maximum Speed ....................................... 120 mph+

Some T1 history:
The first two T1 locomotives were 6110, and 6111. Both locomotives were experimental and built to Pennsy specifications by Baldwin Locomotive Works ( BLW ) of Philadelphia Pennsylvania in 1942. They arrived just in time to help out with WWII traffic. They were so big that they could only operate west of Harrisburg. 6111 was unique in that it was equipped with a Franklin booster in its trailing truck. The Franklin Booster added an additional 13,500 lbs. of tractive effort, giving her a total tractive force of 78,500 lbs, no other T1's were built with boosters. In the spring of 1944, after logging 120,000 miles of road service, 6110 was sent to Juniata test plant in Altoona Pennsylvania for extensive testing. 6110 met or exceeded all expectations of the Pennsylvania Railroad engineering department and based on these satisfactory tests, the Pennsylvania Railroad ordered fifty more T1's! The new locomotives were built between 1945 and 1946. The Juniata shops built locomotives 5500-5524, plus all the coal and water tenders, while Baldwin built the remaining locomotives 5525-5549. There were some minor design changes to the appearance of these 50 locomotives, mostly for ease of maintenance, but they still retained the almost shark like appearance of the original two prototypes 6110, and 6111. The T1's marked the end of an era for the Pennsy, they were a last ditch effort to build a steam locomotive that could compete with the new diesel locomotives. Sadly it was all too little too late and the T1's were the last steam locomotives ever built by the Juniata Shops. With all their beauty, power and technology, the T1's were just no match for the efficiency of the Diesel electric locomotive. In the end T1s were just too big and complicated as well as too difficult to maintain. All T1's were eventually retired and scrapped.

My illustration shows T1 No. 6110 and a proud crew member at the 31st railroad yard in Pittsburgh, the bridge in the background is the 28th Street Bridge [link] that connects Liberty Avenue and the Strip District with Polish Hill.

Adobe Illustrator 8.0, Apple Macintosh G3 iMac, OS 9.2.