HO - Steam Loco Kits
PRR T1  Loco and Tender Kit 
  

Locomotives of the 4-4-4-4 type represented advanced mechanical engineering concepts of the very popular 4-8-4. Both wheel arrangements were similar, but testing showed that doubling up on cylinders and machinery produced great benefits to railway travel. This new development was to be dubbed "duplex".

Duplexes had lighter machinery, had a shorter cylinder stroke, utilized less wear and tear on the parts, had a lower piston thrust, had smaller cylinders, and had a rigid frame.

The first two T1 engines, which were experimental, were the 6110 and 6111 in the year 1942. The 6111 got a Franklin booster in its trailing truck, and with this addition was now able to carry up to 13,500 pounds. The total length of the engine along with the tender was 122 feet.

In 1945, the Pennsylvania Railroad placed an order for fifty engines. Altoona built the numbers 5500-5524 and Baldwin built 5525-5549. Then things started going wrong for the T1. Cost for poppet valve maintenance rose sharply, contour rotary cams were tried out, the economy was in a poor state after World War II, and some locomotives were fitted with Walschaert valve gear to become class T1a. By the mid-1950's, the T1's were all but obsolete.

Another problem that the T1 faced was being slippery on the rails due to weight transfer from front to back of the train. Plans were designed to make the train adhere more to the rails, but no feasible solution was ever found to save the T1. The T1 was popular in its day because it was an unusual engine; however its career was to be short-lived. Unfortunately, none of the T1's were ever saved.

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#529  PRR T1  Loco and Tender Kit
Kit includes die cast boiler, tender body and cylinders. Kit includes over 35 brass detail parts.  All the holes in body and tender are drilled for the brass superdetail parts. No soldering is required.  All supderdetail parts may be glued to the zinc casting using your favorite glue (ACC, Goo, Ambroid, 2 part epoxy, etc.). 

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Prototype Specifications	Model  Specifications
Cylinders 19-3/4" x 26" Steam pressure 300 lbs. Tractive force 64,650 lbs. Weight of engine 502,200 lbs. Wheel base 51' 11" Color: Brunswick Green	Length with Tender 17" Height 2-1/4" Minimum radius 22" Power Two Bowser DC-71 Drivers 80" Box Pok

Kit Parts Photos showing than as they 
are included with the kit

Complete Kit	Side Rod Kit	Miscellaneous Kit
Lead Truck Bag	Valve Gear Parts	Boiler Detail Parts
Trailing Truck Parts	Tender Parts	Decal #8001

Assembly Instructions for PRR T-1 Duplex
PDF file 1meg

Reference Manual Pages

Photo of Super detailed Model with parts in brass color
Model painted Brunswick Green

Loco 1	Loco 2	Loco 3	Loco 4
Loco 5	Loco 6	Loco 7	Loco 8
Loco 9	Loco 10	Loco 11	Loco 12
Loco 13
Tender 1	Tender 2	Tender 3	Tender 4
Tender 5	Tender 6	Tender 7

Model Photos of a PRR T-1 built by Tony Wasilewski

Photo 1	Photo 2	Photo 3
Photo 4	Photo 5	Photo 6

Prototype Photos

Photo 1

Photo 2

Photo 3

Photo 4