USRA Designs

USRA Mikado Steam Engine

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Rutland USRA Mikado 3d Model

All 3d modeling and renders done with Modo by Luxology

 

 

(If you just want to take a look at the pictures, go here) I have chosen to model Rutland's Mikados as they were in the early 20's, pretty much as they were when they were delivered from ALCO, the manufacturer. This means they will be configured as a "standard" USRA light Mikado and not reflect the many changes that were made to each engine over the years. For example,this means that:

 

  • The bell is on the front of the smoke box;
  • The injectors are below the cab and the starter is in front of the cab;
  • The whistle is at a 70 degrees pointing forward;
  • The fully mechanical cylinder cock valve and rigging is still in place;
  • The low water alarm added in the 20's on the engineer's side between the steam dome and the cab is not present;
  • Everlasting blow-off valve up front on either side of the firebox
  • and many more, that I don't know.
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    Even though this model will be a standard USRA Mikado (hopefully as produced by ALCO), identifying all the specific engine components and then finding adequate reference material has proven illusive. So to move forward, I have tried to identify components as best as I am able and to use the reference material I could find and make educated "guesses" where I could not. Some of these are as follows:

     

    Injectors - Nathan's non-lifting injectors 1918 Special A (USRA) model, see here

     

    Starter - Nathan Balanced Lever Starting Valve, Type 1921 (this was probably not the exact model used, but it was the best reference I could find)

     

    Brake components - Westinghouse No. ET-6 components with a 8 1/2" Cross Compound Air Compressor, see here

     

    Generator (dynamo) - The Pyle-National Company Type "K-2" Steam Turbine and Generator

     

    Lubricator - Nathan six feed Bull's Eye lubricator with six pint capacity located in cab.

     

    Rear frame cradle - Southern Railway Plans, PS-4 Frame Cradle, Back Section with modifications

     

    Stoker - Locomotive Stoker Company, Type D Duplex Stoker, see here

     

    Classification lights - as found on the USRA Pacific of the ACL #1504 on display in Jacksonville, FL (http://www.metrojacksonville.com/article/2008-oct-atlantic-coast-line-1504) Manufacturer unknown.

     

    Headlight - as found on the USRA Pacific of the ACL #1504 on display in Jacksonville, FL (http://www.metrojacksonville.com/article/2008-oct-atlantic-coast-line-1504) Manufacture unknown.

     

    Sander - United Metallic Packing Company Leach A-10 Double Trap

     

    Whistle - Nathan five tone whistle .

     

    Turret - According to Baldwin specifications for the USRA Mikado engines they built; "All steam valves attached to the cab turret which have no auxiliary valve in the cab are t have extensions running back through front of cab with handles on top of boiler" (Baldwin sup 206).

     

    For the model I have included the following connections:

    Dry pipe. Connect into cab (pipe size 3")

    Injector left. Valve- ball valve for maintenance, no operations connection into cab since injector has steam control (pipe size 3", taped)

    Injector right. Valve- ball valve for maintenance, no operations connection into cab since injector has steam control (pipe size 3", taped)

    Brake compressor. Valve with control into cab (pipe size 2", cast iron)

    Stoker. Valve with control into cab (pipe size 3", taped)

    Generator. Valve with control into cab (pipe size 1/2", cast iron)

    Draft blower. Valve with connection into cab (pip size 2", cast iron)

    Sander. Connection into cab, then distributed to sander

     

    See the render page for a look at the progress, here