PRR I1sa Decapod


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Select 2009, 2010, 2012 Pre Sp1, Mac 1 if you use:
Trainz 2009, Trainz 2010, Trainz 2012 - Build 49922 or Trainz Mac 1

Select 2012 Sp1, T:ANE, Mac 2 if you use:
Trainz 2012 Sp1 - Build 57720 or higher, Trainz New Era or Trainz Mac 2

How to find your Trainz build number:

  1. Open the Trainz App on your computer
  2. Before launching the game, locate the 5 digit build number on the bottom right corner of the launch window


  •  3 Part Echo Whistle
    3 Part Echo Whistle
  •  Animated Bell
    Animated Bell
  •  Animated Coal Load
    Animated Coal Load
  •  Auto Marker Lamp Placement
    Auto Marker Lamp Placement
  •  Auto Numbering Rolling Stock
    Auto Numbering Rolling Stock
  •  Auto Running Numbers
    Auto Running Numbers
  •  Auto Selecting Car Skins
    Auto Selecting Car Skins
  •  Bill & Steve Cab Figures
    Bill & Steve Cab Figures
  •  Blueprint Design
    Blueprint Design
  •  Caboose Brake Whistle
    Caboose Brake Whistle
  •  Caboose Vestibule Views
    Caboose Vestibule Views
  •  Doghouse Interior Views
    Doghouse Interior Views
  •  Multiple Outside Views
    Multiple Outside Views
  •  Photographic Texturing
    Photographic Texturing
  •  Reverse Headlight
    Reverse Headlight
  •  Show/Hide Brakeman
    Show/Hide Brakeman


A total of (598) I1s’ were constructed between 1916 and 1923 by Baldwin and Juniata. They were the largest 2-10-0 Decapods built in the US, producing 90,000 lbs of tractive effort. With large 30.5 x 32″ cylinders, a nearly 8′ diameter free steaming boiler and (10) 62″ drivers, the I1s were absolutely massive, taking advantage of the PRR’s heavy trackage and high allowed axle loads. Their power was undeniable, but they were not popular with the crews, for they were rough riding at all but low speeds. Because of the large boiler, the size of the drivers were limited, which made it impossible to mount counterweights large enough to balance the piston thrusts, resulting in the engine to pound constantly, giving them their nicknames: “The Holy Terror of the PRR”. In 1919, USRA Russian Decapod #1147 (eventually becoming Frisco’s #1630) was leased to the PRR for testing. It was found to be inadequate with the I1s producing practically twice the power. A test was performed in 1923 with I1s #4358 at the Altoona Test Plant. It was determined that at 21.36 mph, a total of 7000 lbs of coal were consumed in just 30 minutes! An average of 7 tons per hour! Eventually, (498) of the I1s’ were converted to I1sa’s, which utilized a 78% cut-off adjustment that increased the total tractive effort to a whopping 96,000 lbs! Their tenders were also found to be insufficient with the ferocious appetites for coal when assigned longer trains and longer distances. The standard 90F82 (9000 Gallons, Freight, 82″ Firing Deck) tender were swapped out for massive 210F82 (21000 Gallons, Freight, 82″ Firing Deck) welded tenders to accommodate for longer runs. Coal capacity was increased from 18.5 ton to 31 tons. The Coast to Coast Tenders as they were referred to were actually longer than the engine, and weighed more when loaded. After WWII, a number of modifications were made to the I1sa’s, including: Swapping the positions of the Headlight and Dynamo to make easier access for maintenance on the Dynamo, the tender lettering was spaced farther apart and many engines were equipped with cab signal systems. The whistles were also swapped on many engines. Originally equipped with a Banshee, crews expressed frustrations with them, and they were swapped out for traditional PRR 3 Chime whistles removed from older late 1800’s era passenger engines that were being scrapped. The PRR’s I1sa’s lasted until the very end of steam in 1957.

Today: Only (1) of the (598) PRR I1sa Decapods survive:

#4483 and a 90F82 tender are on display on a siding at the WNYRHS Headquarters in Hamburg, NY

PRR I1sa Decapod Heavy Coal Pack includes: Pre-War Engine, Short & Long Tenders, Post-War Engine, Short & Long Tenders, GLa Hopper, H21 Hopper and N5c Cabooses with and without Train Phone system

Coal Country used in the Promo video can be purchased HERE
A Steam Session is also available as a free add-on for Coal Country HERE

Product Installation

  1. Download the file included in your order confirmation email or from your account downloads.
  2. Launch your Trainz Content Manager.
  3. Drag the downloaded cdp file into the content manager window.
    While in content manager, go to FILE on the top left and select "import cdp" or "import content", find your downloaded cdp and select.

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